MAGNETROL 384-2K00-003

Echotel® Model 300/301
Ultrasonic Non-Contact
Transmitter For Level/
Volume/Open Channel Flow
Software version 1.x
Instruction Manual and Parts List
DESCRIPTION
The Model 300/301 is a full-featured, powerful ultrasonic
system for measurement of liquid level, volume, or open
channel flow. Available as an integral or remote mounted
transmitter, this extremely versatile system is simple to
install and calibrate.
PRINCIPLE OF OPERATION
The Model 300/301 is a versatile system that utilizes noncontact ultrasonic technology to measure liquid levels in a
variety of applications. The system consists of a transmitter
and an ultrasonic transducer. The transducer contains a
piezoelectric crystal that has the ability to convert electrical
signals generated by the transmitter into ultrasonic pulses.
The unit operates by directing ultrasonic pulses, or sound
waves, through the air toward the liquid surface. They are
then reflected off the liquid surface as an echo, and returned
to the transducer. The piezoelectric crystal then converts the
returned echo into an electrical signal which is analyzed by
the transmitter. The elapsed time between the generation of
the ultrasonic pulse and the return echo is proportional to
the distance between the face of the transducer and the liquid surface.
TABLE OF CONTENTS
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Model Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Measurement Range Calculations . . . . . . . . . . . . . . . . . .3-4
Transducer Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Transmitter Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Electrostatic Discharge (ESD) Handling Procedure . . . . . .6
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-10
Software Configuration . . . . . . . . . . . . . . . . . . . . . . . .11-23
Pre-configuration Worksheet . . . . . . . . . . . . . . . . . . . . .12
Complete Menu Structure . . . . . . . . . . . . . . . . . . . .13-14
Measured Values Menu . . . . . . . . . . . . . . . . . . . . . . . . .15
System Configuration Menus . . . . . . . . . . . . . . . . . .15-21
I/O Configuration Menu . . . . . . . . . . . . . . . . . . . . . .22-24
Advanced Configuration Menu . . . . . . . . . . . . . . . . .25-26
Diagnostics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Modbus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27-32
Functions and Data Format . . . . . . . . . . . . . . . . . . . . . . .28
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28-31
RS-485 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32-33
Agency Approvals/
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .34
Dimensional Specifications . . . . . . . . . . . . . . . . . . . . .34-35
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
CAUTION: Please read the entire installation section
carefully prior to starting installation.
UNPACKING
Unpack the instrument carefully, making sure all components
have been removed from the packing material. Inspect all
components, and report any damage to the carrier within 24
hours. Check the contents of the carton, making sure it
agrees with the packing slip and the purchase order. Verify
that the model number imprinted on the nameplate matches
the number on the packing slip and the purchase order.
Report any discrepancies to the factory. Check and record
the serial number for future reference when ordering parts.
MODEL IDENTIFICATION
Each Model 300/301 Ultrasonic Transmitter has a nameplate
which shows the model number of the unit. Each model
number is coded to identify the options in that specific unit.
Listed below are definitions of each digit of the model number. By referring to these charts, the installer can determine
exactly which options the unit contains.
INTEGRAL MOUNT MODEL 300 TRANSMITTER
TRANSDUCER PART NUMBER
300-R
-45
384-
Transmitter type
300 - Integral mount transmitter
Transducer type
384 - 38 kHz Transducer
Transmitter housing
R - Aluminum die cast with dual
1" NPT conduits
Process connection
2 - 1" NPT Œ
5 - 2" NPT
Input power
0 - 120 Vac, 50/60 kHz
1 - 240 Vac, 50/60 kHz
2 - 24 Vdc
Kynar transducer material
Process output signal
1 - 4-20 mADC
3 - RS-485 with Modbus
5 - 4-20 mADC & RS-485 with Modbus
Relay output
0 - No relays
C - Two 10-amp SPDT relays w/ gold flash contacts
D - Four 10-amp SPDT relays w/ gold flash contacts
Transducer type
G - 2" NPT Kynar with 3" insertion length
L - 2" NPT Kynar with 10" insertion length
K
-
Transducer housing
0 - No housing (35' of cable potted
into the transducer)
1 - Cast aluminum, NEMA 4X/7/9
housing with 3/4" NPT single conduit
(cable ordered separately)
Y - 316 SS, NEMA 4X/7/9 housing with
3/4" NPT single conduit (cable
ordered separately)
Transducer mounting bracket 
0 - No mounting bracket
3 - Wall mount bracket for 2" NPT process
connection transducer
4 - Floor mount bracket for 2" NPT process
connection transducer
Transducer insertion length
003 - 3" (76 mm) length
010 - 10" (254 mm) length
Π1" NPT not available with Transducer housing codes 1 or Y
 Transducer mounting brackets not available with 1" NPT
transducers.
REMOTE MOUNT MODEL 301 TRANSMITTER
301-R
-400
Transmitter type
301 - Remote mount transmitter
Transmitter housing
R - Aluminum die cast with dual
1" NPT conduits
CONNECTING CABLE PART NUMBER
Input power
0 - 120 Vac, 50/60 kHz
1 - 240 Vac, 50/60 kHz
2 - 24 Vdc
Cable length in feet
10 feet (3 m) minimum, 500 feet (152 m) maximum length.
Example: 12-foot cable length = 037-3176-012
Output signal
1 - 4-20 mADC
3 - RS-485 with Modbus
5 - 4-20 mADC & RS-485 with Modbus
Relay output
0 - No relays
C - Two 10-amp SPDT relays w/ gold flash contacts
D - Four 10-amp SPDT relays w/ gold flash contacts
2
037 - 3176 -
MEASUREMENT RANGE CALCULATIONS
MEASUREMENT RANGE PARAMETERS
HOW TO CALCULATE
Ultrasonic non-contact devices are typically rated for a
maximum range in ideal conditions. Experience has shown
that maximum range must be reduced for certain factors.
Although the maximum range rating is somewhat conservative, each application must be evaluated for specific
conditions.
To estimate how successful a particular application may be,
using the chart on page 4:
The operating parameters listed below can impact the maximum range of measurement:
• Surface agitation
1. Select one condition from each of the operating
parameters that best describes your application.
2. Enter the corresponding performance multiplier value
in the application column.
3. Multiply all of the selected values together.
4. Multiply step 3 by 30' (maximum potential range);
this yields a value that is the maximum allowable
measurement range for this application.
• Vapors and steam (as measured by temperature
difference between liquid and air)
Example:
• Beam spread interference
The vessel is a closed-top tank, noninsulated, 22-feet tall.
• Transducer alignment
• Foam
• Dust
• Air movement
Surface agitation:
Expect slight agitation from fill
line. Performance multiplier 0.9.
Vapor and steam:
The process temperature is
+130° F, slight vapor is expected.
Performance multiplier 0.9.
Beam interference:
No interference exists.
Performance multiplier 1.0.
Transducer alignment:
The transducer will be perpendicular to the liquid surface.
Performance multiplier 1.0.
Foam:
None.
Performance multiplier 1.0.
Dust:
None. Performance multiplier 1.0.
Air movement:
None. Performance multiplier 1.0.
Ambient temperature:
0 to +120° F.
Performance multiplier 1.0.
Pressure:
Atmospheric pressure.
Performance multiplier 1.0.
• Ambient temperature
• Pressure
Sensor alignment
Beam spread
interference
Air movement
Beam spread
interference
Will the Model 300/301 work for this application?
Calculation:
Vapors
Surface
agitation
Dust
Multiply all values in the application column:
0.9 x 0.9 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x 1.0 x
30 feet (maximum) = 24.3 feet
Foam
The calculation yields 24.3 feet as the new maximum range.
Since the tank is 22 feet tall, this application will give satisfactory results.
NOTE: The performance multipliers provided are conservative estimates. Since these factors are subjective, the
values have been designed to provide very high confidence
of system success. Contact the factory if there are any
questions concerning the interpretation of any of these performance multipliers.
3
MEASUREMENT RANGE CALCULATIONS, cont.
Operating Parameter
Condition
SURFACE AGITATION: Surface agitation or waves can degrade the
performance. Moderate agitation results in only slight degradation
of performance. The worst case is when the surface is a good
reflector, but in the wrong direction. (See also transducer alignment.)
VAPORS AND STEAM: Vapors in the air space, above the process,
become apparent, and cause problems when the liquid process
temperature is well above the temperature of the airspace. The
greater the difference, the more expected vapor problems. The
problems result from condensation or layering in the sound path,
both of which attenuate the sound signal, degrading performance.
Avoid steam if possible.
To avoid these problems, ensure that the vessel is insulated so that
vapors are less likely to condense. If a vent is used, be sure that the
vent, which is where condensation will form, is well away from the
transducer.
BEAM SPREAD INTERFERENCE: It is strongly recommended that
nothing be allowed within the transducer’s beam, except the liquid
which is being monitored. Often, the signal from the liquid will be
strong, compared to the signal from other sources, such as ladder
rungs, filling process material, support struts, etc. For that reason,
some applications may provide satisfactory results, even with
interference. Interference from agitator blades is only an intermittent
interference that usually has little effect on performance.
It is recommended there be no interference within the 6° half angle
of the transducer beam. If interference is unavoidable, make the interference as far as possible from the transducer so that the real signal
at the longest distance is stronger than the interference signal.
Smooth, glasslike surface
1.0
Slight agitation, choppiness
0.9
Heavy agitation
0.8
Slight vortex (6°)
0.7
No condensation
1.0
Little condensation
0.9
Much condensation/
foggy appearance
0.8
No interference
1.0
Agitator at speed less than 60 RPM
1.0
Agitator at speed greater than 60 RPM
DUST: Dust attenuates the sound and results in poor performance.
Even barely perceptible haze in the air can cause significant
attenuation.
AIR MOVEMENT: The movement of air, as possible in an open top
vessel, can create a layer from which the sound will reflect. This will
be most noticeable in applications where vapors or steam tend to
form.
AMBIENT TEMPERATURE: The ambient temperature can have a
significant effect on the sound and on the transducer’s capability to
transmit and receive sound. The most noticeable effect on the
transducer is at the temperature extremes.
PRESSURE: Sound requires air molecules to be able to travel. Sound
will not travel in a vacuum. Likewise, higher pressures will allow
the sound to continue without decay, which can cause problems with
multiple echoes.
Consult
Factory
Interference outside 4°, far from
transducer (in bottom third of range)
0.8
Interference outside 4°, near to
transducer (in top third of range)
0.5
TRANSDUCER ALIGNMENT: Optimum performance is obtained when Beam perpendicular to liquid surface
the transducer is perfectly aligned. If the process is not perpendicular
to the sound beam, the sound will not reflect properly back to the
Beam 4° off from perpendicular
transducer. The effect is significant.
FOAM: Even small thicknesses of foam can attenuate the ultrasound
and render the system inoperative. If possible, moving the transducer
to an area in the tank where there is less foam will improve the
performance. Thick, heavy-density foams can sometimes produce
a reflection from the top of the foam. The multipliers shown at right
are general guidelines. For further assistance consult the factory.
Performance
Multiplier Application
1.0
0.5
No foam
1.0
Light froth, less than 0.25" thick
0.8
Light foam, less than 0.5" thick
0.5
Light foam, more than 1" thick
0.1
No dust
1.0
Haze, barely perceptible
0.7
Slight dust
0.4
Heavy dust
0.1
No air movement
1.0
Open vessel, but transducer below rim
0.8
Open air movement in sound path
0.7
-20° to +140° F (-29° to +50° C)
1.0
-40° to -20° F (-40° to -29° C)
0.9
+140° to +160° F (+50 to +70° C)
0.9
-10 to +50 psig (0.689 to +3.45 Bar)
1.0
Pressures outside above rating
Consult
Factory
Multiply all values together in the application column
Maximum Potential Range for Model 300/301
Maximum allowable measurement range for this application
4
X 30'
TRANSDUCER MOUNTING
CAUTION: Please read the entire installation section carefully prior to starting installation. Also read the Measurement
Range Calculations section on pages 3-4 to make sure that you have selected the proper level system for your application.
CAUTION: If equipment is used in a manner not specified by manufacturer, protection provided by equipment may be impaired.
GENERAL GUIDELINES
STANDPIPES
The unit can be provided as an integral mount Model 300
with the transducer connected to the transmitter housing, or
as a remote mount Model 301 with the transmitter mounted
as far as 500' (152 m) away from the transducer. Both the
transducer and the transmitter are approved for Class I,
Division 1, Groups B, C, & D areas.
In applications where the material level may come into the
dead band, the transducer must be mounted in a standpipe.
The diameter of the standpipe should be at least 8" (203
mm); and its length should be limited to 11" (279 mm) from
transducer face. Refer to Figure 2.
TRANSDUCER MOUNTING LOCATION
Proper mounting of the ultrasonic transducer is very critical
to the operation of any non-contact ultrasonic application.
Both the accuracy and the reliability of the Model 300/301
can be adversely affected if the transducer is mounted
improperly. This section must be followed carefully to make
sure that the optimum mounting location is chosen, and that
proper mounting techniques are used for the transducer.
2" NPT
Stand
pipe
Maximum 11"
(279 mm) or less
Transducer
Several factors should be considered when selecting the
transducer location:
8" (203)
Minimum I.D.
• Inherent dead band of the transducer
• Standpipes
• Application difficulties (foam, turbulence, vapors)
This end welded
or flanged
Figure 2
Transducer Mounting in Standpipe
• Ultrasonic beam angle
TRANSDUCER DEAD BAND
The transducer must be mounted directly over the liquid surface, as shown in Figure 1. Non-contact ultrasonic instruments require a “dead band” or “blind space” between the
face of the transducer and the maximum liquid level. The
minimum dead band for the Model 300/301 is 18" (457 mm).
This dead band should be taken into consideration when
mounting the transducer. If the level must be measured all
the way to the top of the tank, the transducer should be
mounted in a standpipe as shown in Figures 2 and 3.
APPLICATION DIFFICULTIES
Model 300
Flange
Air
Maximum range 30.0' (9.1 m)
Figure 3
Transducer Mounting for Tanks with Exhaust
Liquid
Dead band
18" minimum
(457 mm)
Maximum span
28.5' (8.7 m)
Typically the liquid surface is most turbulent at the fill point.
Foam on the other hand, is most likely to accumulate at the
opposite end of the fill. Since foam and turbulence can both
create difficulties in reflecting a strong ultrasonic signal back
into the transducer, it is best to pick a mounting location
away from these areas in the vessel.
Avoid installing the transducer in tank top openings that
exhaust heated air or vapors. The boundaries between the
vapors and the outside air often represent acoustic impedance gradients that can cause troublesome sound reflections. In those installations, the transducer should be mounted well away from the opening inside the tank, or in a standpipe as illustrated in Figures 2 and 3.
Figure 1
Typical Transducer Mounting
5
TRANSDUCER MOUNTING cont.
ULTRASONIC BEAM ANGLE
The transducer must be mounted such that the beam does
not touch the sidewall or obstructions (ladders, fill lines, submerged pumps, etc.) between the transducer face and the
liquid surface. The ultrasonic pulse is emitted with a beam
spread of 12° (6° radius) from the face of the transducer.
Objects that extend into the ultrasonic beam can produce
false echoes that may give erroneous level readings.
Table 1 can be used to determine how far away from the wall,
ladder, submerged pump, or other obstruction, the transducer must be mounted to avoid producing false echoes.
Generally speaking, the transducer should be mounted one
foot away for every 10 feet of height.
CAUTION: HAND TIGHTEN ONLY. Do NOT use a pipe
wrench or other tools when tightening the transducer. Do
NOT tighten by holding onto the transducer housing.
Avoid excessive twisting of the transducer cable.
Distance from
Transducer
Face (feet)
3'
6'
9'
12'
15'
18'
21'
24'
27'
30'
Minimum Distance
12° Beam
from Wall or
Diameter (feet) Obstruction (inches)
0.6'
4"
1.3'
8"
1.9'
11"
2.5'
15"
3.2'
19"
3.8'
23"
4.4'
26"
5.0'
30"
5.7'
34"
6.3'
38"
Table 1
Ultrasonic Beam Angle
CAUTION: Do NOT install transducers in the center of
domed roof tanks. Locate transducers 1' to 3' off-center
to minimize false/multiple echoes being reflected off the
domed roof.
TRANSMITTER MOUNTING
TRANSMITTER MOUNTING LOCATION cont.
CAUTION: The instrument is rated per IEC 1010 for use
in installation Category II, Pollution Degree 2.
If the unit is supplied as an integral Model 300, please skip
to the next section which covers proper ESD handling procedures. This section covers proper transmitter mounting
if the unit is a Model 301 remote transmitter.
TRANSMITTER MOUNTING LOCATION
The following guidelines should be taken into consideration when selecting the mounting location for the remote
mounted Model 301 transmitter:
2. Avoid locations that are exposed to intense direct sunlight. In locations where intense sunlight is a concern,
use a sunshade over the unit.
3. Also avoid locations that are subjected to flooding or
excessive vibration or shock.
NOTE: A switch or circuit breaker shall be installed in
close proximity to equipment and within easy reach of
operator. It shall be marked as the disconnecting device
for the equipment.
1. Keep the transmitter away from potential sources of
electromagnetic noise that may interfere with the performance of the unit.
ELECTROSTATIC DISCHARGE (ESD) HANDLING PROCEDURE
Magnetrol electronic instruments are manufactured to the
highest quality standards. These instruments utilize electronic components which may be damaged by static electricity
present in most work environments. The following steps are
recommended to reduce the risk of component failure due to
electrostatic discharge:
1. Ship and store circuit boards in anti-static bags. If an
anti-static bag is not available, wrap board in aluminum
foil. Do not place boards on foam packing materials.
6
2. Use a grounding wrist strap when installing and removing circuit boards. A grounded workstation is also recommended.
3. Handle printed circuit boards only by the edges. Do not
touch components or connector pins.
4. Ensure that all electrical connections are completely
made and none are partial or floating. Ground all
equipment to a good, earth ground.
WIRING
NOTE: Do NOT attempt to operate this unit at voltages other
than as ordered from the Model Identification as it will damage the unit.
NOTE: Proper routing of the wires into the 300/301 is critical to unit operation. The power and relay wiring should be
brought into the 300/301 through the 1" NPT conduit opening at the back of the unit next to the transformer. All other
wiring (transducer, 4-20 mA, and RS-485) should be routed
through the 1" NPT conduit opening in the front of the unit.
No cables should be routed through the bottom center entry
in the base of remote-mounted Model 301 units.
CAUTION: This instrument is grounded through green
head screw contact in the base. The power input must
include a ground wire connected to a good earth ground.
Failure to ground the instrument may allow a shock hazard to exist!
TRANSMITTER POWER WIRING
1. Ensure that power source is turned off from unit.
2. Pull the power supply wires through the conduit
connection.
3. Connect the positive (hot) supply wire to the L1 on terminal block TB1.
4. Connect the negative (neutral) supply wire to the L2/N
on terminal bock TB1.
5. Connect the ground wire to the green screw in the
housing base.
Line 1 (HI)
Line 2 Neutral
Ground
U.S.
Europe
U.K.
Black
White
Blue
Black
Brown
Blue
Green/Yellow
Green/Yellow
Green/Yellow
Table 2
Wiring Colors By Country/Continent
Relay 1 (TB2)
NO
CO
NC
NC
CO
NO
Relay 3 (TB5)
Relay 2 (TB3)
NO
CO
NC
NC
CO
NO
Relay 4 (TB4)
L1 (+)
Input power (TB1) Not used
L2/N (–)
Figure 4
Power Supply Board Wiring
7
WIRING cont.
Shield
TRANSDUCER
WIRING
(X1, X2 [GND], SHLD)
X1
X2
Active/Passive
mode switch
(+)
(–)
}
4–20 mA terminals
A
B
Not
used
}
RS-485 terminals
S
H
L
D
+ –
TEMPERATURE
SENSOR
WIRING
(+, –)
Shield
Orange with white stripe
White with blue stripe
Shield
White with orange stripe
Blue with white stripe
Transducer wiring (TB6)
+
–
X2
Shield
X1
Figure 5
Front Panel Wiring
TRANSDUCER WIRING
The transducer wiring section describes the proper wiring
procedures for connecting a remote Model 301 transmitter
with a Model 384 transducer. If you have an integral Model
300 unit, please proceed to Control Relay Wiring.
NOTE: Remote mount Model 301 transducer cabling should
be routed through the 1" NPT conduit opening in the front of
the unit. No cables should be routed through the bottom
center entry in the base of remote-mounted Model 301 units.
The transducer cable consists of two twisted pairs of wire,
wrapped with a shield. Each wire is labeled for identification.
Refer to Figures 5 and 6.
After running the transducer wiring through the conduit,
from the transducer to the transmitter, separate the
wires into two groups;
Group 1 – Signal Wiring (transducer), orange wire pair.
Group 2 – Temperature Compensation Wiring (temperature sensor), blue wire pair.
8
Figure 6
Optional Remote Transducer Housing Wiring
NOTE: It is imperative that Magnetrol cable, part number
037-3176 (Belden Type 8102 or Carol C0515/E111240), be
used. If connecting cable was not provided with unit, consult
the factory for specifications. Maximum total cable length is
500 feet (152 m). AVOID SPLICING CABLE.
To prevent electromagnetic noise from disrupting the normal
operation of the Model 301, each transducer cable must be
run in its own conduit, separated from power, relays, and
other transducer cables.
WIRING cont.
WITHOUT A TRANSDUCER HOUSING
1. Connect the orange with white stripe wire to the terminal marked X1 at TB6.
1. Connect two-wire leads to the desired relay connection
for relays 1– 4. Connect one wire to the terminal labeled
COM and the other to the terminal for the desired contact function, NC for normally closed or NO for normally open. Repeat this step for each relay.
2. Connect the shield wire to the terminal marked GND
at TB6.
2. Refer to Relay Settings in the I/O Configuration section
on page 22 for information on configuring the relays.
3. Connect the white with orange stripe wire to the terminal marked X2 at TB6.
3. Proceed to wire any remaining options the unit may
have.
Group 2
1. Connect the white with blue stripe wire of the twisted
pair to terminal labeled positive (+) at TB6.
2. Connect the blue with white stripe wire of the twisted
pair to terminal labeled negative (-) at TB6.
3. Proceed to the appropriate section for wiring options.
NOTE: Both groups of wire must be connected.
WITH A TRANSDUCER HOUSING
If transducer housing is provided, use the connecting cable
ordered with the remote transducer housing. Connect the
transducer cable between the terminal block in the transducer housing to TB6 in the transmitter. Be sure to connect
wires to appropriate terminals. Refer to Figures 5 and 6 on
page 8.
Group 1
1. Connect the orange with white stripe wire from the
transducer housing terminal marked X1 to the terminal
marked X1 at TB6 in the transmitter.
2. Connect the shield from the transducer housing terminal marked SHLD to the terminal at TB6 in the transmitter.
3. Connect the white with orange stripe wire from the
transducer housing terminal marked X2 to the terminal
marked X2 at TB6 in the transmitter.
Group 2
1. Connect the white with blue stripe wire of the twisted
pair from the transducer housing terminal marked positive (+) to the terminal labeled positive (+) at TB6.
2. Connect the blue with white stripe wire of the twisted
pair from the transducer housing terminal marked negative (-) to the terminal labeled negative (-) at TB6.
3. Proceed to the appropriate section for wiring options.
NOTE: In high humidity applications, it is recommended that
the wiring within the remote transducer housing be completely immersed in an insulating compound (3M #4441 Gella
Re-enterable Encapsulating Compound or equivalent).
NOTE: If the device to be operated by the relay has an
inductive load, a separate power supply should be used for
the Model 300/301 transmitter.
OUTPUT SIGNAL WIRING
4–20 mA DC Output
A shielded twisted pair should be used for the 4-20 mA output. The + and – connections are made at the terminal block
to the right of the 16-button keypad as shown in Figure 5 on
page 8. The shield is connected with a female disconnect to
a connector located in the housing base, just below the sensor connections. The loop is optically isolated, has nongrounded outputs, and can drive a 1000 Ω load.
NOTE: The output may be either an active or passive 4–20
mA. If passive mode, customer must provide loop power.
Figure 5 on page 8 shows the Active/Passive mode switch.
1. Cut approximately 8" of insulation off the twisted shielded cable.
2. Cut the shield wire down just short enough to crimp a
female disconnect (Sta-Kon®) connector. Crimp the connector on and push this over the male connector located at the base of the housing as shown in Figure 7.
3. The + and – wires should then be twisted together and
run up to the 4-20 mA terminal block located to the right
of the 16-button keypad as shown in Figure 7.
4. Connect the positive (+) shielded twisted pair wire to the
+ location on the terminal block.
5. Connect the negative (–) shielded twisted pair wire to
the – location on the terminal block.
NOTE: The shield should be connected to an earth ground
at only one location.
4
5
6
1
2
3
.
0
DEL
4-20 mA
Group 1
ENT
+
–
A
B
CONTROL RELAY WIRING
The Model 300/301 unit is supplied with four relays that can
operate as normal, independent contact closures or be used
as dedicated relays as follows:
Relay 1
Normal/Fault/Lead-Lag
Relay 2
Normal/Lead-Lag
Relay 3
Normal/Lead-Lag
Relay 4
Normal/Lead-Lag
Shield connection
(Cut to shortest
possible length.)
Relay connections are supplied on the main terminal board.
Refer to Figure 4 on page 7.
Figure 7
4-20 mA Wiring
9
WIRING cont.
OUTPUT SIGNAL WIRING cont.
RS-485 Output
A shielded twisted pair should be used for the RS-485 wiring.
The “A” and “B” connections are made at the terminal block
to the right of the 16-button keypad as shown in Figure 5 on
page 8. The shield is connected with a female disconnect to
a connector located in the housing base, just below the sensor connections.
1. Cut approximately 8" of insulation off the twisted shielded cable.
2. Cut the shield wire down just short enough to crimp a
female disconnect (Sta-Kon®) connector. Crimp the connector on and push this over the male connector located at the base of the housing as shown in Figure 7.
NOTE: If both the 4-20 mA and the RS-485 outputs are
being used, twist the shields together and follow Step 2
above.
3. The “A” and “B” wires should then be twisted together
and run up to the RS-485 terminal block located to the
right of the 16-button keypad as shown in Figure 7.
4. Connect the “A” wire from the control room converter to
the terminal marked “A” on the RS-485 terminal block
located to the right of the 16-button keypad as shown
in Figure 5.
10
5. Connect the “B” wire from the control room converter to
the terminal marked “B” on the RS-485 terminal block
located to the right of the 16-button keypad as shown
in Figure 5.
6. If connecting multiple Model 300/301 units in a daisychain configuration, be sure to connect the wiring in
parallel and have the ending unit with the termination
resistor jumpered. Jumpers should be removed from
other units in the daisy chain. The three termination
jumper pins (JP1) are located behind the black protective cover and just below the RS-485 terminal block.
The last unit in the daisy chain should have a jumper
between pins 1 and 2. All other units in the daisy chain
should either have a jumper between pins 2 and 3, or
have no jumper at all.
NOTE: Polarity among units in loop must be observed.
NOTE: If connecting several units, note the color wire used
for A and B and ensure that the same designated color is
used for each of the units.
SOFTWARE CONFIGURATION
GENERAL CONFIGURATION INSTRUCTIONS
PASSWORD
The Model 300/301 ultrasonic non-contact transmitter contains a microprocessor-based operator interface which
allows for easy configuration of level, flow, or volume control
applications. All calibration parameters for these applications
are entered via a keypad located on the front of the transmitter.
A password protection system restricts access to portions of
the menu which affect the unit’s operation and configuration.
The password will be requested whenever programming
changes are requested in a menu. Once the password is
entered in a specific menu, it is not requested again until you
exit that menu and go into a different menu to make
changes.
The primary structure of the software is broken down into six
main menu groups as follows:
The password can be changed to any number between 1
and 32767. This procedure is described under the ADV
CONFIG menu on page 25.
Measured Values
To view measured values
System Config
First time configuration
(Essential programming data)
I/O Config
Configure all input/output
functions
Advanced Config
Additional values that affect the
performance of the unit
Diagnostics
Test functions and unit performance data
UP arrow: Scroll to the previous menu item.
Run mode
Normal display. The unit will
default to this display after
approximately five minutes without any key stroke.
DOWN arrow: Scroll to the next menu item.
CAUTION: The Model 300/301 is shipped from the factory with the password 300. If the password is misplaced
or forgotten, please consult the factory for assistance.
OPERATOR KEYPAD
All unit configuration instructions in this manual will appear
on the instrument display. The following keys are used:
ENT
ENTER:
Enter the next menu level or confirm
information of the current menu item.
DEL
DELETE: To exit or back out of the current menu
level, or delete an entry.
0-9
Numeric input of data.
•
Decimal point.
For entering tag line data (see page 26).
KEY FUNCTIONS FOR ENTERING INPUT
NOTE: When a line ends with an up or down arrow, that line
may be scrolled up or down.
When the symbol
is displayed on the top line, push ENT
to program this selection, or press
to proceed to the
next selection.
When the symbol
is displayed on the bottom line, push
to change the selection; then push ENT to accept.
When the symbol
is displayed on the bottom line, enter
the value, then push ENT to accept.
NOTE: Pressing DEL will back you out of the configuration
menu and return you to run mode.
NOTE: If a key is not pressed for 5 minutes, the display
returns to the run mode.
11
MODEL 300/301 PRE-CONFIGURATION WORKSHEET
This page is designed to be a worksheet where all the system configuration data can be written down prior to entering
them into the unit. The system configuration is much faster
once all the data is known. This page can then be used for
future reference after the unit has been configured.
System configuration of the Model 300/301 is easily accomplished by inputting the following values as they relate to
your specific application:
Level Applications
Volume & Level Applications
Flow & Level Applications
Level units:
Range:
Span:
Level units:
Volume units:
Vessel type:
Vessel dimension:
Range:
Span:
Level units:
Flow units:
Primary flow element:
Reference distance:
Maximum head:
Low flow cutoff:
Units: A selection for level units is required regardless of
whether level will be the primary measurement. This is
because the Model 300/301 calculates volume and flow from
the level that is measured in the vessel, flume, or weir. One
of the four level units shown on page 13 must be selected.
Volume or flow units must also be selected if the Level Only
mode is not being used.
Model 300
Range: Range is defined as the distance from the face of the
ultrasonic transducer to the bottom of the level span. This
usually is the distance from the face of the transducer to the
bottom of the vessel. The maximum range for the Model
300/301 is 30' (9.1m).
Dead zone
Air
Span
Range
Liquid
Span: Span is the distance from the bottom of the level
measurement to the top. The maximum span is the range
minus the dead band (18") of the ultrasonic transducer. The
maximum span for the 300/301 is 28.5' (8.7m).
Vessel Type: The Volume & Level mode will require one of
the nine vessel types shown on page 13 to be selected.
Equations to calculate volume from level are stored in the
software. If the application has a vessel type that is not listed, then a custom table will need to be built using either a linear or spline curve.
Vessel Dimensions: Dimensional data will vary depending
on which vessel type is selected. See pages 18 & 19 for more
information.
Primary Flow Element: The Flow & Level mode will require
selection of one of the many flow elements to be selected
that are shown on page 14. Equations to calculate flow from
level are stored in the software. If the application has a flow
element that is not listed, then a custom table will need to be
built using either a linear or spline curve.
Reference Distance: The reference distance is the open
channel flow equivalent to the range. See above.
Maximum Head: Maximum head is the open channel flow
equivalent to the span. See above.
Low Flow Cutoff: The low flow cutoff will force a zero flow
value when the level is at or below this point.
12
SOFTWARE CONFIGURATION cont.
GENERAL PROGRAMMING MENUS
Following is an outline of the general menu structure used in
the Model 300. Even though all features are shown, certain
features will only affect specific models. For example, the
relay menu can be accessed in all models, but changes will
only affect the models with relays.
MEASURED VALUES
Use the UP and DOWN arrow keys to scroll through any portion of the menu; use the ENT key to make a selection. A
detailed description of each portion of the menu follows on
page 15.
Volume (Volume mode only)
Flow (Flow mode only)
Level
Distance
Loop
Temperature
Previous menu
Range Setting
SYSTEM CONFIG
Level Units
Mode Setup
Inches
Feet
Centimeters
Meters
Span Setting
Previous Menu
Level Only
Volume Units
Vessel Type
Volume & Level
NOTE: Use
keys to move up or
down in the menu
ENT
tree. Use the
key
to accept a value or
to move right in the
menu tree. Use DEL
to delete a keystroke
or to move left in the
menu tree.
Manual Set
Auto Set
Previous Menu
Manual Set
Auto Set
Previous Menu
Cubic Feet
Cubic Inches
Gallons
Milliliters
Liters
Rectangular
Horizontal/Flat
Horizontal/Elliptical
Horizontal/Spherical
Spherical
Vertical/Flat
Vertical/Elliptical
Vertical/Spherical
Vertical/Conical
Custom Table
Table Type
(Custom table
only)
Linear
Spline
Range Setting
Manual Set
Auto Set
Previous Menu
Span Setting
Previous Menu
Flow Units
Flow Element
Flow & Level
Manual Set
Auto Set
Previous Menu
Cubic Feet/Second
Cubic Feet/Minute
Cubic Feet/Hour
Gallons/Minute
Gallons/Hour
Million Gallons/Day
Liters/Second
Liters/Minute
Liters/Hour
Refer to list on page 14
Custom Table
Table Type (Custom
table only)
Reference
Distance
Maximum Flow
Maximum Head
Low Flow Cutoff
Data Entry
(Custom
table only)
Data Entry
(Custom
table only)
Linear
Spline
Manual Set
Auto Set
Previous Menu
Manual Set
Auto Set
Previous Menu
13
SOFTWARE CONFIGURATION cont.
GENERAL PROGRAMMING MENUS cont.
I/O CONFIG
Relay Settings
Fault Relay #1 (#1 only)
Enable/Disable (#1 only)
From page 13
Enable/Disable
Level
Volume (Volume &
Level mode only)
Flow (Flow & Level
mode only)
Flow Element
(flow mode only)
Controlled by (Volume
& Flow modes only)
Relay On Point
Select Relay
Relay Off Point
Relay Action
DNRG<Set Point
DNRG>Set Point
Relay On Delay (0–255)
Relay Off Delay (0–255)
Fault Mode
Off on Fault
Hold on Fault
Previous Menu
Lead-Lag Mode
Previous Menu
H-Flume
6"
9"
12"
18"
24"
30"
36"
54"
Off
1–2
1–2–3
1–2–3–4
2–3
w/#1 as fault relay
2–3–4
}
4–20 mA Settings
Enable/Disable
Controlled by
(Volume & Flow
modes only)
4 mA Point
20 mA Point
Fault Mode
Previous Menu
Level
Volume (Volume &
Level mode only)
Flow (Flow & Level
mode only)
Baud Rate
Comm Port Setup
Previous Menu
V-notch
22.5°
30°
45°
60°
90°
120°
22 mA
3.5 mA
Hold
Address (0-247)
Parity
Previous Menu
1200
2400
4800
9600
Odd
Even
None
ADVANCED CONFIG
Calibrate
Gain Limit (Range 0–32)
Starting Gain (0 – Gain limit)
Damping (1–60)
Echo Loss Delay (1–150)
Level
Loop
Flow
Change Password
Enter Old Password
Enter New Password
Enter New Again
Previous Menu
Adjust Loop Points
3.5 mA offset
Enter Tag Line
Change Tag
Default Display
Previous Menu
DIAGNOSTICS
Test Relays
Select Relay (1–4)
Test 4–20 Output
Enter Loop Value (3.5–22)
Gain/% Signal
View Version
Previous Menu
14
Palmer Bowlus
4"
6"
8"
10"
12"
15"
18"
21"
24"
27"
30"
Parshall
1"
2"
3"
6"
9"
12"
18"
24"
36"
48"
60"
72"
96"
120"
144"
Rectangular
w/End
Contractions
Rectangular
w/o End
Contractions
Cipoletti
22 mA offset
Manning
Custom Table
SOFTWARE CONFIGURATION cont.
MEASURED VALUES MENU
The Measured Values Menu can be accessed by pressing the
ENT key from the run mode. You may scroll though the
measured values by using the up and down arrows. The
items displayed in the Measured Values Menu will differ
depending on whether Level Only, Vol & Level, or Flow &
Level has been selected in the System Config section
described later in this manual.
Measured Values Menu
Display
Keystroke
Comments or Additional Keystrokes
Magnetrol Int’l
xxxx units
Press ENT
Enters the Measured Values Menu.
Measured Values
Press ENT
Displays the first item (Level) in the Measured Values Menu.
Level
xxxx units
Press
Indicates the level of material in the vessel. Pressing
to the next menu item.
Distance
xxxx units
Press
Indicates the distance from the face of the transducer to the target. Pressing
allows you to continue to the next menu item.
Loop
xxxx
Press
Indicates the milliamp current loop output. Pressing
the next menu item.
Temperature
xxxx F
Press
Indicates the air temperature at the transducer. The temperature units are in ° F or ° C
depending upon whether English or metric units of level are chosen. Pressing
allows you to continue to the next menu item.
Previous Menu
ENT to select
Press ENT,
, or DEL
allows you to continue
allows you to continue to
Pressing
will cycle back to the Level display, or press ENT or DEL to continue
to the next configuration item.
SYSTEM CONFIGURATION MENU—LEVEL ONLY
This System Configuration menu is used for basic setup of
the unit. Refer to pages 13 and 14 for the complete menu
layout. The Model 300/301 is capable of being configured in
three different modes of operation—Level Only, Volume &
Level, or Flow & Level. The System Configuration Menu is
for selecting the measurement units and calibrating the sys-
tem to measure Level Only (refer to page 15-16), Volume &
Level (page 17), or Flow & Level (page 20).
The following table is a step-by-step procedure for using the
Level Only menu. It is assumed that you are starting from the
RUN mode.
System Configuration Menu (Level Only)
Display
Keystroke
Comment and/or Additional Keystrokes
Magnetrol Int’l
xxxx units
Press ENT
At start up, the unit is in the run mode displaying Magnetrol Int’l. Pressing ENT
allows you to enter the main menu.
Measured Values
ENT to Select
Press
Allows you to enter the System Config menu.
System Config
Press ENT
Enters the first display (Level Units) of System Config. menu.
Level Units
Inches
Press ENT or
If inches are the desired Level Units press
to continue to the next item. To
change units, press ENT and to select Feet, Centimeters, or Meters. Press ENT
to select desired Level Units.
Enter Password
(if units changed)
Enter Valid Password
(factory default is 300)
Entering a valid password and pressing ENT sets your unit selection and
continues on to the next item.
Mode Setup
Level Only
Press
Press
to continue to the next item. This section covers a Level Only configuration. Turn to page 17 if a Volume & Level configuration is desired, or page 20
for Flow & Level.
Continued on page 16
15
SOFTWARE CONFIGURATION cont.
SYSTEM CONFIGURATION MENU—LEVEL ONLY cont.
System Configuration Menu (Level Only) cont.
Display
Keystroke
Comment and/or Additional Keystrokes
Range Setting
xxxx units
Press ENT or
Press ENT to change the range setting. If setting is correct press
to continue to Span Settings. Refer to Figure 9.
NOTE: It is recommended to use Manual Set (as opposed to Auto Set) when changing the range or span settings.
Manual Set
xxxx units
Auto Set (If chosen)
xxxx units
Press ENT or
Press ENT to manually set the range setting. An
will appear in the bottom line
of the display. This allows you to change the range value. Measure the
distance from the face of the transducer to the maximum distance to be
measured. Enter value and press ENT. If Auto Set is preferred press .
Press ENT or
The liquid surface must be at the maximum distance to be measured.
Check to see that the distance being displayed is correct. When you press the
ENT key, that distance will be set as your range and the program will continue
on to the next selection. To continue without making changes press .
NOTE: The span value is automatically set ONLY when the entered range value has decreased from its previous value.
Span Setting
xxxx units
Press ENT or
Value shown will be 18 inches less than the range setting. This is the maximum
span value available. If you want to reduce the span, press ENT. Refer to Figures
9 and 10. If the present setting is correct press
to continue to Previous Menu.
Manual Set
xxxx units
Press ENT or
Press ENT to manually set the span setting. Measure the distance from the
maximum range that was set to the highest point to be measured. Enter value
and press ENT. If Auto Set is preferred press .
Auto Set (If chosen)
xxxx units
Press ENT or
The liquid surface must be at the highest level to be measured.
Check to see that the level being displayed is correct. When you press the ENT
key, that measurement will be set as your span and the program will continue on
to the next selection. To continue without changes press .
Previous Menu
ENT to select
Press ENT
Pressing the ENT key will set all values and return to System Config. Press DEL
to return to the run mode.
Maximum span should
never be great enough to
allow level measurement
inside the nozzle, where
the ultrasonic transducer is
mounted.
18"
(457 mm)
NO
YES
Range
Span
Figure 9
16
Figure 10
SOFTWARE CONFIGURATION cont.
SYSTEM CONFIGURATION MENU—VOLUME AND LEVEL
This menu is used to select the measurement units and configure the system to measure Volume & Level. Refer to page
15 for Level Only applications or page 20 for Flow & Level
applications.
Following is a step-by-step procedure for using the Volume
& Level menu. It is assumed that you are starting from the
RUN mode.
System Configuration Menu (Volume and Level)
Display
Keystroke
Comment and/or Additional Keystrokes
Magnetrol Int’l
xxxx units
Press ENT
At start up, the unit is in the run mode displaying Magnetrol Int’l. Pressing ENT
allows you to enter the main menu.
Measured Values
ENT to Select
Press
Allows you to enter the System Config menu.
System Config
Press ENT
Enters the first display (Level Units) of System Config menu.
Level Units
Inches
Press ENT or
If inches are the desired Level Units press
to continue to the next item. To
change units, press ENT and to select Feet, Centimeters, or Meters. Press ENT
to select desired Level Units.
Enter Password
(if units changed)
Enter Valid Password
(factory default is 300)
Entering a valid password and pressing ENT sets your unit selection and
continues on to the next item.
Mode Setup
Level Only
Press ENT
Then press
Volume Units
Cubic Feet
Press ENT or
If cubic feet are the desired Volume Units, press
to continue to the next item.
To change units, press ENT and
to select cubic inches, gallons, milliliters, or
liters. Press ENT to select desired Volume Units.
Vessel Type
Rectangular
Press ENT or
Press ENT, , then ENT to change present setting. You may select Rectangular,
Horiz/Flat, Horiz/Ellip, Horiz/Sphere, Spherical, Verti/Flat, Verti/Ellip, Verti/Sphere,
Verti/Conical or Custom Table (Refer to Figure 12 for Custom Table). If the
present setting is correct (Rectangular), press ENT, input vessel dimensions, and
then press
to continue to next selection.
Radius=
xxxx units
(Vessel Dependent)
Enter value and press ENT
The values requested may vary depending on the type of vessel selected. Refer
to vessel drawing for proper dimensions.
Width=
xxxx units
(Vessel Dependent)
Enter value and press ENT
The values requested may vary depending on the type of vessel selected. Refer
to vessel drawing for proper dimensions.
Length=
xxxx units
(Vessel Dependent)
Enter value and press ENT
The values requested may vary depending on the type of vessel selected. Refer
to vessel drawing for proper dimensions.
Range Setting
xxxx units
Press ENT or
Press ENT to change the range setting. If setting is correct, press
to Span Settings.
then ENT to change to Volume and Level mode.
to continue
NOTE: It is recommended to use Manual Set (as opposed to Auto Set) when changing the range or span settings.
Manual Set
xxxx units
Press ENT or
Press ENT to manually set the range setting. An
will appear in the bottom line
of the display. This allows you to change the range value. Measure the distance
from the face of the transducer to the maximum distance to be measured. Enter
value and press ENT. If Auto Set is preferred press .
Auto Set (If chosen)
xxxx units
Press ENT or
The liquid surface must be at the maximum distance to be measured. Check to
see that the distance being displayed is correct. When you press the ENT key,
that distance will be set as your range and the program will continue on to the
next selection. To continue without making changes press .
NOTE: The span value is automatically set ONLY when the entered range value has decreased from its previous value.
Span Setting
xxxx units
Press ENT or
Value shown will be 18 inches less than the range setting. This is the maximum
span value available. To reduce the span press ENT. If the present setting is
correct press
to continue to Previous Menu.
Manual Set
xxxx units
Press ENT or
Press ENT to manually set the span setting. Measure the distance from the
maximum range that was set to the highest point to be measured. Enter value
and press ENT. If Auto Set is preferred press .
Auto Set (If chosen)
xxxx units
Press ENT or
The liquid surface must be at the highest level to be measured. Check to see
that the level being displayed is correct. When you press the ENT key, that
measurement will be set as your span and the program will continue on to the
next selection. To continue without changes press .
Previous Menu
ENT to select
Press ENT
Pressing the ENT key will set all values and return to System Config. Press DEL
to return to the run mode.
17
SOFTWARE CONFIGURATION cont.
Rad
Rad
Side View
Side View
Ellipse Height
VERTICAL/ELLIPTICAL
Width
VERTICAL/SPHERICAL
Length
Rad
RECTANGULAR
Top View
Length
VERTICAL/FLAT
Rad
Side View
HORIZONTAL/FLAT
Rad
Length
End
Top View
Rad
Conical Height
Side View
VERTICAL/CONICAL
HORIZONTAL/ELLIPTICAL
Figure 11
Vessel Drawings
18
SOFTWARE CONFIGURATION cont.
SYSTEM CONFIGURATION MENU—VOLUME AND LEVEL cont.
Length
Rad
Rad
Side View
HORIZONTAL/SPHERICAL
SPHERICAL
Figure 11
Vessel Drawings cont.
P9
P8
P2
P7
P6
P5
Transition
point
P4
P3
P1
P1 P2
Use where walls are not perpendicular to base.
Concentrate at least two points at beginning (P1) and end (P9);
and three points at either side of transition points.
LINEAR
SPLINE
Figure 12
Custom Table (Volume and Level)
19
SOFTWARE CONFIGURATION cont.
SYSTEM CONFIGURATION MENU—FLOW AND LEVEL
This menu is used to select the measurement units and configure the system to measure Flow & Level. Refer to page 15
for Level Only applications or page 17 for Volume & Level
applications.
Following is a step-by-step procedure for using the Flow &
Level menu. It is assumed that you are starting from the RUN
mode.
System Configuration Menu (Flow and Level)
Display
Keystroke
Comment and/or Additional Keystrokes
Magnetrol Int’l
xxxx units
Press ENT
At start up, the unit is in the run mode displaying Magnetrol Int’l. Pressing ENT
allows you to enter the main menu.
Measured Values
ENT to Select
Press
Allows you to enter the System Config menu.
System Config
Press ENT
Enters the first display (Level Units) of System Config menu.
Level Units
Inches
Press ENT or
If inches are the desired Level Units press
to continue to the next item. To
change units, press ENT and to select Feet, Centimeters, or Meters. Press ENT
to select desired Level Units.
Enter Password
(if units changed)
Enter Valid Password
(factory default is 300)
Entering a valid password and pressing ENT sets your unit selection and
continues on to the next item.
Mode Setup
Level Only
Press ENT
Then press
Flow Units
Cubic Feet/Second
Press ENT or
If Cu ft/second are the desired Flow Units, press
to continue to the next item.
To change units, press ENT and
to select Cu Ft/minute, Cu Ft/hour,
Gals/minute, Gals/hour, Mil Gals/day, Liters/sec, Liters/minute, or Liters/hour.
Press ENT to select desired Volume Units.
Flow Element
Palmer Bowlus 4"
Press ENT
Press
to select the proper type and size of flow element. Flow elements are
listed on page 14. Press ENT to select desired flow element.
Reference Dist
xx.xx units
Press ENT
The display will show Manual Set which allows you to enter the reference (range)
value. Refer to Figures 14 and 15 for flume and weir side views.
twice, then ENT to change to Flow and Level mode.
NOTE: It is recommended to use Manual Set (as opposed to Auto Set) when changing the Reference Distance.
Manual Set
xxxx units
Press ENT or
Press ENT to manually set the reference distance. An
will appear in the
bottom line of the display. This allows you to change the reference value.
Measure the distance from the face of the transducer to the maximum distance
to be measured. Enter value and press ENT. If Auto Set is preferred press .
Auto Set (If chosen)
xxxx units
Press ENT or
The liquid surface must be at the point of zero flow. Check to see that the
distance being displayed is correct. When you press the ENT key, that distance
will be set as your reference and the program will continue on to the next
selection. To continue without making changes press .
Maximum Flow
xx.xx units
Press
The unit will automatically display a value for Maximum Flow that is based on the
Flow Element and Reference DIstance that was entered. This can be decreased
if desired, by entering a new value and pressing ENT.
Maximum Head
xx.xx units
Press
The unit will automatically display a value for Maximum Head that is based on the
Flow Element and Reference DIstance that was entered. This can be decreased
if desired, by entering a new value and pressing ENT.
Low Flow Cutoff
xx.xx units
Press
When the flow values fall below the Low Flow Cutoff value, the flow value is
driven to zero. The unit will automatically display a value 0.10 for the Low Flow
Cutoff. This can be changed if desired, by entering a new value and pressing ENT.
Previous Menu
ENT to select
Press ENT
Pressing the ENT key will set all values and return to System Config. Press DEL
to return to the run mode.
20
SOFTWARE CONFIGURATION cont.
SYSTEM CONFIGURATION MENU—FLOW AND LEVEL cont.
Concentrate points as follows:
A. At least two points at beginning (P1 and P2);
B. At least two points at end (P9 and P10);
C. Three points at approximate average flow rate (for
example, P3, P4, P5); and at transition point (P7)
and points on either side (P6, P8).
P10
Transition
point
P9
P7
P5
P8
P6
P4
P5
P4 Average flow rate
P3
P3
P2
P2
Concentrate points along curve
P1
P1
SPLINE OR LINEAR
SPLINE
Figure 13
Custom Table Flow and Level
Reference
(range)
Ultrasonic
Transducer
Dead band
18" (457)
minimum
Flow
Throat
Water surface
Maximum head/
maximum flow
Figure 14
Flume (side view)
Drawdown
Dead band
18" (457)
minimum
Maximum head/
maximum flow
Reference (range)
Ultrasonic
Transducer
Crest
Maximum head, H
Maximum
crest height,
2–3 H
3–4 H
minimum
Channel floor
Figure 15
Weir (side view)
NOTE: Install the transducer at the point recommended by
the flume/weir manufacturer to insure proper flow measurement; or consult factory for transducer location.
21
SOFTWARE CONFIGURATION cont.
I/O CONFIGURATION MENU
This menu is used to configure the relay settings, 4–20 mA
output, and communication parameters of the Model
300/301. Refer to pages 13 and 14 for the complete menu
layout. The first part of this section shows how to configure
each type of relay (fault, alarm, and lead lag). The second
part shows how to configure the 4-20 mA and RS-485 outputs. The I/O Configuration Menu can be entered from the
RUN mode by pushing ENT and the pressing
twice.
RELAY SETTINGS
The 300/301 transmitter can be provided with four relays,
two relays, or no relays. The relays can be configured to be
fault (diagnostic) relays, alarm relays (controlled by level, volume, or flow), or lead lag (pump control) relays.
Fault Relay Configuration
Relay #1 is the only relay that can be used as a fault relay to
indicate when the diagnostics of the 300/301 have determined that there is a fault condition. There are six fault conditions that will change the state of relay #1 when a fault
occurs: echo loss, ringdown, transducer fail, no transducer,
bad transducer, and temperature fail. See the
Troubleshooting section for details on each of these fault
conditions.
I/O Configuration Menu (Fault Relay #1 Setting)
Display
Keystroke
Comment and/or Additional Keystrokes
I/O Config
to select
Press ENT
Enters the Relay Settings menu.
Relay Settings
to select
Press ENT
Allows entry into the Select Relay submenu.
Select Relay
to select
Press ENT
Allows configuration of relay.
Press ENT
Enters a submenu to configure relay #1.
Fault Relay (#1)
Disable
Press ENT
Moves the
to the bottom line of the LCD. This allows relay #1 to be enabled
if it is to be used.
Fault Relay (#1)
Disable
Press
Pressing
Fault Relay (#1)
Enable
Press ENT
Moves the
Fault Relay (#1)
Enable
Press
Moves to the next item.
Relay On Delay
1 sec
Press ENT
or
A one-second delay on the relay is preset from the factory to prevent relay
chattering during turbulent process conditions. Press
to keep this at one
second, or press ENT to change it to a different (0-255 seconds) value.
Relay Off Delay
1 sec
Press ENT
or
Press
to keep this at one second, or press ENT to change it to a different
(0-255 seconds) value.
Previous Menu
to select
Press ENT
Reverts back to the Select Relay submenu.
Select Relay
1
22
enables the relay.
to the top line of the LCD.
SOFTWARE CONFIGURATION cont.
I/O CONFIGURATION MENU cont.
Alarm Relay Configuration
Any of the relays can be configured as alarm relays. Each
alarm relay can be configured to be controlled by Level,
Volume (when in Volume & Level mode), or Flow (when in
the Flow & Level mode).
The alarm relays can be configured to have the same on and
off points, or different on and off points.
I/O Configuration Menu (Alarm Relay Setting)
Display
Keystroke
Comment and/or Additional Keystrokes
I/O Config
to select
Press ENT
Enters the Relay Settings menu.
Relay Settings
to select
Press ENT
Allows entry into the Select Relay submenu.
Select Relay
to select
Press ENT
Allows configuration of relay.
Press ENT or
2, 3, or 4
Press ENT to begin configuring relay #1 (if it was not used as a Fault relay) or
enter 2, 3, or 4 to configure the other relays.
Fault Relay (#1)
Disable
Press
Fault Relay (#1) will be displayed only if you are configuring relay #1. Press
to keep it disabled as a fault relay, and proceed to configure it as an alarm relay.
Enable/Disable
Disable
Press ENT
and
Enables the relay. After enabling the relay press ENT again to move the
up to the top line, and then press
to proceed to the next item.
Controlled By
Level
Press ENT
or
If the unit is in the Level Only mode, this screen will not be shown. If the unit is
in the Volume & Level, or Flow & Level modes, the relay can be used to
control level, volume or flow. Pressing
will set the relay to be controlled by
level. Press ENT, , ENT, and
if controlling by volume or flow if desired.
Relay On Point
xxxx units
Press ENT
Inserts a
on the bottom line of the LCD which allows the value to be changed.
Enter the value for the on point and then press ENT and .
Relay Off Point
xxxx units
Press ENT
Inserts a
on the bottom line of the LCD which allows the value to be changed.
Enter the value for the off point and then press ENT and .
Relay Action
DNRG < Setpoint
Press ENT
or
This screen will only appear if the “Relay On” and “Relay Off” points are the
same. Select either “DNRG<Setpoint” to have the relay de-energize at a value
that is less than the set point (low level fail-safe), or “DNRG>Setpoint” to have
the relay de-energize at a value that is greater than the set point (high level failsafe).
Relay On Delay
1 sec
Press ENT
or
A one-second delay on the relay is preset from the factory to prevent relay
chattering during turbulent process conditions. Press
to keep this at one
second, or press ENT to enter a different (0-255 seconds) value.
Relay Off Delay
1 sec
Press ENT
or
Press
to keep this at one second, or press ENT to enter a different (0-255
seconds) value.
Fault Mode
OFF on FAULT
Press ENT
or
If the unit detects one of the six fault conditions described in Fault Relay
Configuration (page 22), the alarm relays can either be configured to turn OFF
(de-energize) or to HOLD their current state. The factory default setting is OFF.
Previous Menu
to select
Press ENT
Reverts back to the Select Relay submenu.
Select Relay
1
Lead-Lag Relays
As shown in the General Programming Menu on page 14, all
four relays can be included in a lead-lag group for pump control. The factory default setting is OFF for the lead-lag mode.
To set-up relays in a lead-lag group, the lead-lag mode must
be changed to one of the following five selections: 1-2, 1-23, 1-2-3-4, 2-3, or 2-3-4. If relay #1 is configured as a fault
relay (page 22), then 2-3 and 2-3-4 are the only two possible
relay groupings for lead-lag control of pumps. If relay #1 is
not configured as a fault relay, then the lead-lag group selections are 1-2, 1-2-3, or 1-2-3-4.
back
When configuring the lead-lag mode you will see the following warning message: No Alarm Relays in LeadLag Group.
This message means that any relays that are included in the
lead-lag group must have different on and off points. The
software does not allow any individual relays in the lead-lag
group to have the same on and off points. See Figure 16 on
the next page for further explanation.
23
SOFTWARE CONFIGURATION cont.
I/O CONFIGURATION MENU cont.
Lead-Lag Relays cont.
Since the configuration for relays in a lead-lag group is the
same as alarm relays, refer to page 23 for configuration.
The DNRG < Setpoint screen will not be shown since leadlag relays cannot have the same value for “Relay On” and
“Relay Off.”
As shown in Figure 16, all the RELAY OFF points in the leadlag group should be the same value. This allows the lead-lag
cycle to reset when more than one relay comes on. The RELAY
ON points for the second, third, and fourth relays (if used), are
staggered above the RELAY ON point for the first relay.
On point for second
lead-lag relay
On point for first
lead-lag relay
Off point for both
lead-lag relays
Figure 16
Lead-lag Relay Configuration
4-20 mA OUTPUT AND RS-485 SETTINGS
The 4-20 mA output can be controlled by either level, volume, or flow depending on which mode was selected in the
System Configuration Menu.
The RS-485 menu configures the Modbus digital communications port of the unit.
I/O Configuration Menu (4-20 mA Output Settings)
Display
Keystroke
Comment and/or Additional Keystrokes
I/O Config
to select
Press ENT
Enters the Relay Settings menu.
Relay Settings
to select
Press
Scrolls to the 4-20 mA Settings submenu.
4-20 mA Settings
to select
Press ENT
Enters the 4-20 mA Settings submenu.
Enable/Disable
Disable
Press ENT,
Enables the 4-20 mA output. Press ENT and
Controlled by
Level
Press ENT or
If unit is configured in the Level Only mode, this screen will not be displayed.
Press
to have the 4-20 mA controlled by level, or ENT, , ENT,
to have it
controlled by volume or flow.
4 mA Point
xxxx units
Press ENT
Inserts a
on the bottom line of the LCD which allows entry of the 4 mA point
value. After entering the 4 mA value, press ENT and .
20 mA Point
xxxx units
Press ENT
Inserts a
on the bottom line of the LCD which allows entry of the 20 mA point
value. After entering the 20 mA value, press ENT and .
Fault Mode
Press ENT
Determines the status of the 4-20 mA if a system fault is detected. Use the
to select either Hold, 22 mA, or 3.5 mA then press ENT and .
Previous Menu
to select
Press ENT
Reverts back to the 4-20 mA Settings menu.
Display
Keystroke
Comment and/or Additional Keystrokes
I/O Config
to select
Press ENT
Enters the Relay Settings menu.
Relay Settings
to select
Press
Scrolls to the Communication Port Setup submenu.
Comm Port Setup
to select
Press ENT
Enters the Communication Port Setup submenu.
Address (0-247)
1
Press
or ENT
This screen is used to set the address for this particular unit during polling. Enter
the address via the keypad. Make sure that no other unit uses this same address.
Baud Rate
Press
or ENT
Set the baud rate (communication speed) for the unit. Baud rates of 9600, 4800,
2400, or 1200 are available. Enter the baud rate via the keypad. This value must
match the Modbus settings of your system.
Press
or ENT
Set the parity bit at Even, Odd, or None via the keypad. This value must match
the Modbus settings of your system.
Hold
to proceed to the next item.
I/O Configuration Menu (RS-485 Settings)
twice
9600
Parity
Even
Previous Menu
to select
24
Press ENT
Reverts back to the Communication Port Setup.
SOFTWARE CONFIGURATION cont.
ADVANCED CONFIGURATION MENU
The Advanced Configuration menu sets many parameters that
are not normally used in the operation of the unit. The
Advanced Configuration menu can be accessed from the run
mode by pressing ENT and or until the display shows:
The entire Advanced Configuration menu is shown below,
followed by the configuration instructions for each item.
Adv Config
to select
Advanced Configuration Menu
Menu Display
Menu Item Explanation
Adv Config
to select
Enters the Advanced Configuration menu. Press ENT.
Calibrate
xxxx units
Used to adjust for the speed of sound if the ultrasonic signal is going through media other than air.
NOTE: It is strongly recommended to consult the factory prior to using this feature!
Gain Limit
Used to limit the gain to a value between 0 and 32. Since the unit adapts its gain to suit the application, it is not
recommended to use this feature unless instructed to by the factory.
32
Starting Gain
0
Used to adjust the starting gain to a value between 0 and 32. Since the unit adapts its gain to suit the application,
it is not recommended to use this feature unless instructed to by the factory.
Damping (1-60)
6
Used to set the damping (1-60 seconds) for the unit. This value can be changed depending on how turbulent the
process is, or if the rate of fill is very fast or slow.
Echo Loss Delay
1 sec
Used to set a delay (1-150 seconds) of the Fault Alarm (relay #1) when an echo loss occurs.
Default Display
Level
Allows the default display to be changed from Level to Loop (4-20 mA), or Volume or Flow if in the Volume or
Flow mode.
Change Password
to select
The factory preset password is 300. This screen is used to change the password for security purposes.
Adjust Loop Pts
to select
Offsets to the mA current loop can be made.
Enter Tag Line
to select
Used to replace the “Magnetrol Int’l” tag with a user-defined tag such as vessel number or location. Any
alphanumeric characters can be entered as a tag.
Previous Menu
to select
Reverts back to the beginning of Advanced Configuration.
Calibrate
NOTE: It is not recommended to use the calibrate feature
unless specifically directed to do so from the factory.
The Model 300/301 performs level measurement by timing
how long it takes for a round trip ultrasonic pulse to travel
from the face of the transducer to the liquid surface and
back. The measurement assumes that this round trip is in air
where the speed of sound is 1128 feet/second. This speed of
sound is altered when going through gases other than air.
The Calibrate mode can be used to adjust for the speed of
sound when going through homogenous (not stratified layers) gases other than air. However, since most gases exist as
stratified layers of vapors above the liquid surface, the
Calibrate mode is rarely used.
When entering the Calibrate mode, the display will indicate
the distance that the 300/301 has measured from the face of
the transducer to the liquid surface. If this distance is in error,
measure the actual distance and enter this value.
NOTE: Using the Calibrate mode may cause false level readings. Consult factory for reset procedures.
Gain Limit
This displays the value of maximum gain that the unit will use.
This value is from 0-32 and the unit steps up in single-gain
increments until a suitable signal is received. Limiting the gain
to a lower value may help with secondary echo problems.
Enter a value between 0 and 32. Enter Password will be displayed and your chosen password must be entered at this
time. Press ENT to acknowledge the password.
Gain Limit cont.
The Model 300/301 adapts its gain to suit the conditions of
the application. There are 32 gain steps. The higher the number, the higher gain/drive required to detect an acceptable
signal.
Starting Gain
The gain starts out at a value of zero and adjusts itself to a
value (between 0 and 32) such that it can reliably measure
the liquid surface. Approximately once a minute it will reinitialize the gain starting from zero to make sure that the unit is
measuring the proper distance. This is particularly helpful in
tall vessels or those applications with turbulent surfaces. A
higher Starting Gain value will decrease the time for the unit
to achieve the proper Gain value. Adjusting the starting gain
should not be done without consulting the factory.
Damping
The factory default value is 6 seconds for damping. This
value can be changed (from 1-60) depending on the rate of
fill (or empty) of the vessel. Larger damping values can be
beneficial if the liquid surface is turbulent due to the vessel
fill, or agitation from a mixer.
Echo Loss Delay
Used to set a delay (1-150 seconds) of the Fault Alarm (relay
#1) when an echo loss occurs. This helps to avoid a fault
alarm if the 300/301 momentarily loses the ultrasonic signal
due to excessive turbulence, foam or other application
parameters.
25
SOFTWARE CONFIGURATION cont.
ADVANCED CONFIGURATION MENU cont.
Default Display
The factory default is for the unit to display Magnetrol Int’l on
the top line of the LCD while in the run mode, and a level
reading on the bottom line. The bottom line can be changed
to display the mA current loop output value instead of the
level reading. When using the Volume & Level mode, the
default display can be changed to be volume. When using
the Flow & Level mode the default display can be changed
to be flow.
Change Password
Allows for the factory preset password of 300 to be changed
to another value for security purposes. The password can be
any number between 1 and 32767. The format is to enter the
old password, enter the new password, and then enter the
new password again.
Adjust Loop Points
Offsets to the mA current loop can be made if necessary.
This is done by reading the mA current output with a
DVM, and adjusting the 3.5 mA and 22 mA endpoints with
Adjust Loop Points cont.
the
or
keys. These values are set at the factory and
should not need to be adjusted. Contact the factory prior to
making any adjustments to the loop output.
Enter Tag Line
The upper line of the LCD display while in the run mode is a
programmable label referred to as the tag. It is preset at the
factory as “Magnetrol Int’l.” If desired, this tag can be
changed to be any alphanumeric string of 16 characters.
Press ENT and then use or to scan through the characters. Pressing ENT will enter a character and move the cursor
to the next position on the LCD line. Upper and lower case
letters are provided as well as numbers and many ASCII characters. Pressing DEL moves the cursor back one position.
Pressing the
once will start a scrolling of the characters,
and pressing it twice will start a fast scrolling. When close to
the desired character, press ENT and use or to reach the
desired character. A blank space may also be used. The blank
space is found in between the ! and the
while scrolling
through the characters.
DIAGNOSTICS MENU
The Diagnostics Menu provides a method of testing the
instrument’s functionality. It also has useful information for
troubleshooting. Access to Diagnostics Menu is obtained
from the run mode by pushing either the or arrows until
the display shows:
Diagnostics
to select
Diagnostics Menu
Display
Option
Action if ENT is pressed
Comments
Test Relays
to select
Press ENT to change
or or to continue.
Select relay to test, press ENT, then
use or to energize relay.
Allow user to energize any relay
individually. Press ENT when complete.
Test 4-20 mA Loop
to select
Press ENT to change
or or to continue.
Enter desired current output and
press ENT.
Allows user to output desired 4-20 mA
to an external device. Press ENT when
complete.
Gain/ % Signal
xx
xxx
Press
or
to continue.
This is a read-only screen that cannot
be changed.
The gain will increase (from 0 to 32) to
keep the % signal strength at a desired
level for peak performance.
View Version #
xxxxxxxxxx
Press
or
to continue.
Display software version number.
Previous Menu
to select
Press ENT to return to
previous menu or or
to review selection.
26
MODBUS PROTOCOL
IMPLEMENTATION
CONFIGURATION
This protocol guide explains the operation of the Modbus
protocol per Modicon document PI-MBUS-300 Rev J.
The Modbus port on the Model 300/301 must be configured
to establish communications. The keypad allows the user to
set the Magnetrol Modbus port to match the Modbus master. See page 24 for configuration instructions.
The Magnetrol implementation of the Modbus protocol provides a standard form of digital communications. An effort
has been made to parallel current implementations to the
greatest extent possible, so that Magnetrol products communicate with existing Modbus masters.
Check compatibility carefully to ensure that the Model
300/301 is configured for the data format expected by the
host computer. Exceptions made because of the unique
requirements of the Magnetrol installation have been noted.
This is no guarantee, however, that the interpretation made
here will be the same as that followed by the Modbus master.
The Magnetrol implementation of the Modbus protocol provides for the passing of measured and calculated variables,
configuration information, and diagnostics in data registers.
Data is sent in these registers as floating point values, integer
values, numeric codes related to configuration lists, status
summary words (packed bits), or individual flags (single bits).
Magnetrol addresses provide unique identification for the
host. This address may range from 1 to 247 and must be
unique. Each Model 300/301 only responds when a query
has been sent to its unique address by the host.
Magnetrol units support the Remote Terminal Unit (RTU)
mode of transmission. RTU provides improved error detection capabilities and higher throughput than the ASCII mode.
The RS-485 port must be configured for a transmission
speed (baud rate). Allowable values are 1200, 2400, 4800, or
9600 bits per second.
One master and up to 31 units may be multi-dropped on a
single RS-485 communication bus.
The Modbus functions implemented in Model 300/301 are
listed in Table 3.
Table 3 Modbus Functions
Function
Code
Function
01
02
03
04
05
06
15
16
Read
Read
Read
Read
Write
Write
Write
Write
Information Type
1-bit coils
1-bit coils
16-bit register/integer
16-bit register/integer
16-bit register/coils
16-bit register
16-bit register/coils
16-bit register
MODBUS
Nomenclature
Read coil status
Read input status
Read holding registers
Read input registers
Force single coil
Preset single register
Force multiple coils
Preset multiple registers
Exception:
Because the Model 300/301 does not distinguish between inputs and outputs, function codes 01 and 02 (as they apply to bits) and
function codes 03 and 04 (as they apply to numeric values) refer to the same data registers.
27
FUNCTIONS AND DATA FORMAT
The Modbus data in the Model 300/301 is arranged in integer register, floating point registers, and status bits. The
assignments for these registers are found in the tables on
pages 30 and 31. Function codes 03, 04, 06, and 16 are used
with integer registers.
Function codes 01, 02, 05, and 15 are used with status bits.
Both integer and floating-point registers have space
reserved to reorder the registers for maximum communication throughput.
A complete description of all the preceding commands,
except floating point, can be found in Modicon Modbus
Protocol Reference Guide, document number PI-MBUS-300
Rev J.
1. Integer Data: A scaled number from 0 to the maximum
Modbus integer.
2. Character Data: Two ASCII characters per 16-bit register (i.e., date, password).
3. Coded Data: Multiple choice configuration data chosen
from a coded list.
4. Packed Bits: Register form of 16 packed single bits
The integer, character, and coded data registers contain all of
the information needed to configure and read process data.
Any integer register may be read with function code 03 or
function code 04. These same registers may be written one
at a time with function code 06 or multiple registers can be
written with function code 16.
INTEGER REGISTERS
Integer registers are the most commonly used type of
Modbus data and are supported by most Modbus hosts. In
the Magnetrol implementation, the Modbus registers are
arranged in one of the following four formats:
PROGRAMMING
The serial communication for the Model 300/301 is designed
to communicate with a host computer over two wires in a
multidrop system.
Each transmitter in the system is assigned a unique address
that the computer uses to communicate with that transmitter.
COMMAND/RESPONSE SEQUENCE
RXD/TXD +
RXD/TXD –
The system uses half duplex communication with the host
computer acting as the master and the 300/301 transmitters
acting as the slaves. The 300/301 transmitter is designed for
1 master computer and up to 32* slaves. Each slave has a
unique address between 1 and 247 associated with it. The
address is used to wake up the transmitter and interrogate it
for data.
The host will send down a command to the unit using the
address to wake it up. The unit will then analyze the command and retrieve the appropriate data. After sending back
a response, the unit will return to the sleep mode.
Only the host computer can issue a command. Each command contains the unit address, the function code, the data,
and the error checking valve. Magnetrol products support
the CRC error checking valve.
Figure 17
*See cable requirements for the maximum number of units allowed
for intrinsically safe operation.
Command to Transmitter
Command from Host
• Transmitter Address
• Function Code
• Data Bytes
• Error Check
Response from Transmitter
• Transmitter Address
• Function Code
• Data Bytes
• Error Check
Response to Host
Figure 18
28
PROGRAMMING cont.
CHARACTER FRAMING
MEMORY MAP
The Model 300/301 is factory configured for 9600 baud,
even parity, and 1 stop bit. In serial communication, the bits
are sent out one at a time, least significant bit first. These are
surrounded by a start bit (always low) and a parity bit or a
stop bit (if a parity bit, it will be followed by a stop bit)
(always high).
Modbus sets up the data in a memory map. The memory
map is set up in registers that are 2 bytes in length. The read
only registers are numbered form 30001 to 39999. The
read/write registers are numbered from 40001 to 49999. In
order to access these registers; an offset is sent. For example, if the data in register 30001 is to be read, an offset of
0000 is sent.
Start
0
1
2
3
4
5
6
7
Stop
Parity
Stop
Figure 19
MESSAGE FRAMING
All messages start and end with an idle time of 3.5 character
times. For the 300/301 this value is approximately 4 ms at
9600 baud. This will let all the units know that the next byte
to follow is the address field.
3.5 Character
11 Bit Times
Times
Address
Less than 1.5
Character Times
Function
Data
3.5 Character
Times
CRC Check
Individual bits in the bit registers are addressed by a separated map. The read only bits are numbered from 10000 to
19999 and the read/write bits are numbered from 0 to 9999.
In the XXXX unit, both addresses will access the same bit.
The offset for these bits is the same as the registers. For
example, if 10003 is to be read, and offset of 0002 is sent.
MODEL 300/301 MODBUS MAPPING
A maximum and minimum value of 0 indicates that the value
is Read Only. Care must be taken when disabling relays. The
relay will hold the last state when it is disabled. RS-485 is
used for external communications using Modbus.
The Model 300/301 Transmitter uses the Modbus RTU protocol. The user must enter the BAUD rate and the parity that
the master will be using. See page 24 for configuration
instructions. Each of these parameters must be set at the
unit before communication can occur.
1. BAUD rate: 1200, 2400, 4800, 9600.
2. Parity: Odd (8, O, 1), Even (8, E, 1), or None (8, N, 2).
Figure 20
Because of this method for determining the address byte,
the entire message must be sent in a continuous stream. If
an idle time of more than 1.5 character times occurs before
the completion of the message, the next byte received will
be assumed an address byte and the previously received
bytes will be ignored.
29
PROGRAMMING cont.
MODEL 300/301 MODBUS MAPPING cont.
1-BIT COIL VALUES
Command
Register #
Comments
Forces Loop to Loop Force Value
00001
Forces loop to loop force value
On/Off
Enables loop control
On = Enable; Off =Disable
Relay #1 diagnostic test
On = Enable; Off = Disable (normal operation)
Enables Loop Control
00002
Relay #1 to Force On Value
00003
Force On Value (Relay #1)
00004
Off = De-Energized; On= Energized
Relay #2 to Force On Value
00005
Relay #2 diagnostic test
On = Enable; Off = Disable (normal operation)
Force On Value (Relay #2)
00006
Off = De-Energized; On= Energized
Relay #3 to Force On Value
00007
Relay #3 diagnostic test
On = Enable; Off = Disable (normal operation)
Force On Value (Relay #3)
00008
Off = De-Energized; On= Energized
Relay #4 to Force On Value
00009
Relay #4 diagnostic test
On = Enable; Off = Disable (normal operation)
Force On Value (Relay #4)
00010
Off = De-Energized; On= Energized
Enable Relay #1
00011
Off = Disable; On = Enable
Relay Action for Relay #1
00012
Off = DNRG <Set point; On = DNRG > Set point
Relay #1 as Fault Relay Setting
00013
Off = Normal; On = Fault (Read Only —Functions 1 or 2)
Enable Relay #2
00014
Off = Disable; On = Enable
Relay Action for Relay #2
00015
Off = DNRG < Set point; On = DNRG > Set point
Enable Relay #3
00016
Off = Disable; On = Enable
Relay Action for Relay #3
00017
Off = DNRG < Set point; On = DNRG > Set point
Enable Relay #4
00018
Off = Disable; On = Enable
Relay Action for Relay #4
00019
Off = DNRG < Set point; On = DNRG > Set point
16-BIT REGISTER VALUES
Command
30
Register #
Comments
Damping
Units
Lead–Lag Relay Select
40001
40002
30003
Lead–Lag Relay Quantity
30004
On Time Delay — Relay #1
Off Time Delay — Relay #1
On Time Delay — Relay #2
Off Time Delay — Relay #2
On Time Delay — Relay #3
Off Time Delay — Relay #3
On Time Delay — Relay #4
Off Time Delay — Relay #4
Current Relay Status
40005
40006
40007
40008
40009
40010
40011
40012
30013
Loop Control Bits
40014
Output damping values in seconds
1 = inches; 2 = feet; 3 = centimeters; 4 = meters
Refer to Lead–Lag group size table*
(read only—functions 3 or 4)
Refer to Lead–Lag group size table*
(read only—functions 3 or 4)
Time delay before relay energize (seconds)
Time delay before relay de-energize (seconds)
Time delay before relay energize (seconds)
Time delay before relay de-energize (seconds)
Time delay before relay energize (seconds)
Time delay before relay de-energize (seconds)
Time delay before relay energize (seconds)
Time delay before relay de-energize (seconds)
Data contained in lower byte
All “Off” = 0000; All “On” = 000F
Bit 0: Set to 0
Bit 1: 1 = enable; 0 = disable
Bit 2: Set to 0
Bit 4–3: Fault mode: 01 = 22 mA
10 = 3.5 mA
11 = Hold
Bits 5–7: Set to 0
Bits 8–15: Set to 0
Minimum
Decimal
Value
Maximum
Decimal
Value
Maximum
Hex
Value
1
1
3
60
4
15
0 x 3C
0 x 04
0 x 0F
2
4
0 x 04
0
0
0
0
0
0
0
0
0
255
255
255
255
255
255
255
255
15
0
26
0
0
0
0
0
0
0
0
0
x
x
x
x
x
x
x
x
x
FF
FF
FF
FF
FF
FF
FF
FF
0F
0 x 1A
PROGRAMMING cont.
16-BIT REGISTER VALUES cont.
Command
Register #
Comments
Relay #1 Control Bits
40015
Relay #2 Control Bits
40016
Relay #3 Control Bits
Relay #4 Control Bits
40017
40018
Diagnostic Bits
30019
Relay #1 Force Control Bits
40020
Relay #2 Force Control Bits
40021
Relay #3 Force Control Bits
Relay #4 Force Control Bits
Level Reading
Flow/Volume Reading
4–20 mA Reading
Range
Span
4–20 mA Force
4 mA Point
20 mA Point
Relay #1 Off Point
Relay #1 On Point
Relay #2 Off Point
Relay #2 On Point
Relay #3 Off Point
Relay #3 On Point
Relay #4 Off Point
Relay #4 On Point
40022
40023
30024
30025
30026
40027
40028
40029
40030
40031
40032
40033
40034
40035
40036
40037
40038
40039
Bit 0: 1 = enable; 0 = disable
Bit 1: Relay action
0 = DNRG < set point
1 = DNRG > set point
Bit 2: Set to 0
Bit 4–3: Fault Mode: 00 = De-energize
01 = Hold
Bits 5–15: Set to 0
Bit 0–7: Set to 0
Bit 8: 1 = No return signal; 0 = No error
Bit 9: 1 = Ringdown error; 0 = No error
Bit 10: 1 = Transducer fault; 0 = No error
Bit 11: 1 = No transducer; 0 = No error
Bit 12: 1 = Bad transducer; 0 = No error
Bit 13: 1 = Temperature fault; 0 = No error
Bit 14–15: Set to 0
(read only — functions 3 or 4)
Bit 0: Force relay to forced state
1 = enable; 0= disable (normal operation)
Bit 1: Forced relay state
1 = Energize; 0 = De-energize
Bits 2–15: Set to 0
Level reading (level in inches x 10)
Flow/volume reading (x 10)
4–20 mA reading (x 10)
Range value (x 10)
Span value (x 10)
Loop value for loop diagnostics (x 10)
4 mA Point (level in inches x 10)
20 mA point (level in inches x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Point in inches (x 10)
Minimum
Decimal
Value
Maximum
Decimal
Value
Maximum
Hex
Value
0
27
0 x 1B
0
3
3
35
0
0
0
0
0
0
0
0
0
0
220
4800
4800
4800
4800
4800
4800
4800
4800
4800
4800
0 x DC
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
0 x 12C0
*LEAD-LAG GROUP SIZE (REGISTER 30003, 30004)
Lead-Lag Relay Select
0 x 03
0 x 07
0 x 0F
Lead-Lag Relay Quantity
2
3
4
With Relay 1 set as a Fault Relay
0 x 06
0 x 0E
2
3
Description
Relays 1 & 2
Relays 1, 2, & 3
Relays 1, 2, 3, & 4
Relay 2 & 3
Relay 2, 3, & 4
31
RS-485 WIRING
Standard Beldon 8451 shielded, twisted pair, 22-gauge
stranded conductors may be used for interconnection of
units. Order cable through Magnetrol (part number, 0097146-001), specify length at the time of order; 10 feet (3 m)
minimum, 5000 feet (1524 m) maximum.
The preferred method of wiring is that all units be wired in
parallel. It is permissible to have branches, not exceeding
five feet, from the main wiring trunk. One master with a maximum of 31 slave devices is allowable.
1. Connect terminal A from the master device to terminal
A on all slave devices.
3. Connect shielding from ground of master to ground on
all slave devices.
NOTE: Polarity among units in loop must be observed.
The master device and last (farthest) slave device in the loop
must have a termination resistor. This resistor is provided in
the Model 300/301 by jumper placement of JP1. The termination jumper JP1 is located under the shield, below the RS485 terminal block. The jumper JP1 should be in positions 2
and 3 (factory position) for all slave devices except the last
(farthest) device in the loop, which should have the jumper in
positions 1 and 2.
2. Connect terminal B from the master device to terminal
B on all slave devices.
TROUBLESHOOTING
Process
APPLICATION CHECKLIST
Check for the following sensitivities before proceeding to the
next section:
Vapors ____________________________________________
Mild _________________
1. _____ Check for foam.
2. _____ Are vapors present? Visible vapors may cause
false level reflections, invisible vapors may alter
speed of sound.
Excessive _________________
3. _____ Is liquid surface turbulent?
Foam _____________________________________________
Surface Agitation ___________________________________
Angle of Repose ____________________________________
Temperature _______________________________________
Pressure ___________________________________________
Obstructions _______________________________________
If any of the above sensitivities are present, consult the factory for recommendations.
INSTALLATION CHECKLIST
Cable
1. _____ Was Belden 8102 used? If other cable was used,
permanent damage may have been done to the
transmitter.
2. _____ Is transducer wiring run in a dedicated conduit?
3. _____ Is transducer shield connected at both ends?
Transducer
1. _____ Check transducer alignment. Is it vertical?
2. _____ Is transducer mounted hand tight?
Overtightening may cause ringing, some installations may require using a shock absorber.
3. _____ Is minimum nozzle diameter 8 inches?
4. _____ Is maximum nozzle height 11 inches?
4. _____ Does the tank have a mixing blade? Could it be
providing false level readings or creating a vortex resulting in echo loss?
Transmitter
Enter the specified menu, and obtain the following information before consulting the factory.
Measured Values Menu
Level _____________________________________
Temperature _______________________________
Distance __________________________________
System Configuration
Range ____________________________________
Span _____________________________________
Diagnostics Menu
Gain ______________________________________
Signal Strength __________________________%
OTHER INFORMATION
1. Is transmitter indoors or out? ______________________
2. What is the distance from the
transducer face to current level? ___________________
3. What is the transmitter’s
serial number? ___________________________________
5. _____ Check beam path for obstructions, including
tank wall. Refer to page 6 for Ultrasonic Beam
Spread.
4. What is the temperature?
6. _____Check transducer housing for moisture.
5. What is the media
being measured? _________________________________
32
a. At transmitter _________
b. At transducer ______
TROUBLESHOOTING cont.
Following are troubleshooting displays which could appear on the Model 300/301.
Display
Cause
Solution
FACT PARAM FAIL
The factory parameters dealing
with level measurement are corrupt.
Press ENT to continue. This loads the default values for the
factory parameters.
TAG LINE LOSS
The tag line characters are corrupt.
Press ENT to continue. This loads the default tag line into long-term
memory. If you are using a custom tag line, the tag line must be
re-entered.
SYS PARAM FAIL
The main parameters, which store
range, span, and communications,
etc. are corrupt.
Press ENT to continue. This loads default values for the main
parameters. Verify all of the items in the System Config menu.
STRAP TABLE FAIL
There is an error in the custom
table (linear or spline) entry.
Press ENT to continue; the table is cleared. If a custom table is not
being used, then this error can be ignored. If you are using a custom
table, the table has to be re-entered.
FV PARAM FAIL
The flow or volume parameters
are corrupt.
Reconfigure flow and volume settings.
LOOP PRESET FAIL
The loop presets are corrupt.
The loop will have to be recalibrated in the Advance Config menu
under Adjust Loop Points.
RELAY PARAM FAIL
The parameters for Relays
are corrupt.
Press ENT to continue. The relays are disabled, and the settings are
set to default values. Reconfigure the relays from the I/O Config menu.
LOOP PARAM FAIL
The 4–20 mA loop parameters
are corrupt.
Press ENT to continue. The loop is disabled and the settings are set
to default values. Reconfigure the 4-20 mA from the I/O Config menu.
TRANSDUCER FAIL
NO TRANSDUCER
OR
BAD TRANSDUCER
The unit was not able to detect a
transducer connected or was not
able to determine the transducer’s
frequency.
Ensure that the transducer is connected properly to the unit. Try
replacing the transducer. Return the unit for repair.
ECHO LOSS
The unit is not able to detect a
return signal from the transducer.
Ensure that the level to be detected is within the range and span of
the unit. Check the application for foam, obstructions, or heavy
vapors.
RINGDOWN
The transducer is ringing long
enough to ring into the level span of
the unit.
Try decreasing the span to increase the dead band (range minus span)
of the unit. Try replacing the transducer because the current transducer may have a problem that causes it to ring an extra long time.
TEMPERATURE FAIL
The signal from the temperature
Check to see that the transducer wires are connected properly. Ensure
transducer in the transducer is out
that the transducer wires are not shorted or open.
of range. Either a short or open lead
detected.
INVALID PASSWORD
The password entered is not valid.
Retry the previous operation and enter the proper password.
LOOP OUT RANGE
The calculated value for the loop
output is greater than 20 mA or
less than 4 mA. The loop output will
be in its fail-safe mode.
If the level is within a normal operating range, adjust the loop
parameters to allow proper tracking of the level.
33
SPECIFICATIONS
TRANSDUCER SPECIFICATIONS
TRANSMITTER SPECIFICATIONS
Description
Supply Voltage
Power Consumption
Analog output signal
Active mode
Analog output signal
Passive mode
Digital output
Relays
Fail-safe
Ambient Temperature
(Electronics)
Display
Keypad
Humidity (Electronics)
Fuse (Non-replaceable)
Specification
Description
120 Vac +10%/-15%, 50-60 Hz
240 Vac +10%/-15%, 50-60 Hz
24 Vdc +/-20%
12 watts maximum
4–20 mA (isolated)
maximum 1,000 Ω loop resistance
4–20 mA (isolated)
loop resistance dependent on
power supply
RS–485 with Modbus
10 amp SPDT resistive (none, 2, or 4)
User selectable for analog
and relay outputs
Specification
Transducer Frequency 38 kHz
Maximum Range
30 feet (9.1 m)
Maximum Span
28.5 feet (8.7 m)
Dead Band
18 inches (460 mm) minimum
Ambient Temperature
(Transducer)
-40° F to +163° F (-40° C to +73° C)
non-operational to +250° F (121° C)
Temperature
Compensation
Automatic over range of transducer
operating temperature
Operating Pressure
–10 to +50 psig (–0.689 to +3.45 Bar)
Beam Angle
Conical 12°
Cable length
500 feet maximum (between transducer
and electronics)
-40° F to +160° F (-40° C to +71° C)
FM AGENCY APPROVALS
Two-line alphanumeric LCD
(16 characters per line)
16-button
99% non-condensing
3
⁄8 amp, 250 Vac Slo-Blo® for AC units
11⁄2 amp, 250 Vdc Slo-Blo® for DC units
Model
Approval
Indoors and outdoors
NEMA Type 4X and IP 65
Hazardous locations
Class I, Division 1, Groups B, C, & D
Class II, Division 1, Groups E, F, & G
Class III
300-RXXX-45X,
301-RXXX-400
and
384-XKXX-0XX
PERFORMANCE SPECIFICATIONS
Description
Response time
Accuracy
Specification
2 seconds typical
± 0.25% of calibrated span
CSA AGENCY APPROVALS
Model
These units have been tested to EN 50081-2 and EN 50082-2 and
are in compliance with the EMC Directive 89/336/EEC.
DIMENSIONAL SPECIFICATIONS
Approval
300-RXXX-45X,
301-RXXX-400
and
384-XK0X-0XX
Non-hazardous environment
Type 4X enclosure
Hazardous environments
Class I, Division 1, Groups B, C, & D
Class II, Division 1, Groups E, F, & G
Class III
384-XK1X-0XX
and
384-XKYX-0XX
Hazardous environments
Class I, Division 1, Groups C & D
Class II, Division 1, Groups E, F, & G
Class III
Inches (mm)
5.93
(151)
5.93 (151)
3.87 (98)
Rotation
clearance
3.87 (98)
Rotation
clearance
8.46
(215)
1" NPT
8.46
(215)
10.68
(271)
12.25
(311)
1" NPT
1" NPT
(plugged)
1" NPT
2.37
(60)
2 Holes
.38 (10) Dia.
2" NPT
Process
Connection
3.00 (76) or 10.00 (254)
Insertion Length
3.00
(76)
2.00
(51)
3.75
(95)
3/4" NPT
2.12 (54) Insertion Diameter
Model 300 Integral Mount
Model 301 Remote Mount with Bracket
Figure 21
Transmitters
34
Plug
3.50
(89)
SPECIFICATIONS cont.
DIMENSIONAL SPECIFICATIONS
Inches (mm)
3/4" NPT
3/4" NPT
2" NPT
Process
Connection
2" NPT
Process
Connection
3.00 (76) or 10.00 (254)
Insertion Length
Insertion Length
10.00 (254)
384 Transducer with
2" NPT without Housing
384 Transducer with
1" NPT without Housing
ΠThis dimension is common to all
transducers on page.
1
384 Transducer with 2" NPT with Housing
Figure 22
Transducers
REPLACEMENT PARTS
Item
1
2
3
4
5
6
7
8
9
10
11
Description
Part Number
Cover
Base
O-Ring
Daughter board
004-9174-007
004-9188-004
012-2201-253
030-3559-001
4–20
030-2225-001
Logic board
RS-485
030-2225-002
4–20/RS-485
030-2225-003
0 relays 030-2212-003
120 VAC 2 relays 030-2212-002
4 relays 030-2212-001
Power supply
0 relays 030-2212-006
board
240 VAC 2 relays 030-2212-005
4 relays 030-2212-004
0 relays 030-2212-009
24 VDC 2 relays 030-2212-008
4 relays 030-2212-007
Termination board
030-3515-001
Aluminum
004-9104-001
Transducer
housing base
316 SS
004-9140-001
Aluminum
004-9105-001
Transducer
housing cover
316 SS
004-9142-001
Transducer housing O-ring
012-2101-345
Transducer (Refer to Model Identification on page 2.
Figure 23
Replacement Parts
35
IMPORTANT
PRODUCT WARRANTY
QUALITY ASSURANCE
All Magnetrol electronic and ultrasonic level and flow controls are warranted free of defects in materials or workmanship for one full year from the date of original factory shipment.
The quality assurance system in place at
Magnetrol guarantees the highest level of
quality throughout the company. Magnetrol
is committed to providing full customer
satisfaction both in quality products and
quality service.
If returned within the warranty period; and, upon factory
inspection of the control, the cause of the claim is
determined to be covered under the warranty; then,
Magnetrol will repair or replace the control at no cost to the
purchaser (or owner) other than transportation.
Magnetrol shall not be liable for misapplication, labor
claims, direct or consequential damage or expense arising
from the installation or use of equipment. There are no other
warranties expressed or implied, except special written
warranties covering some Magnetrol products.
The Magnetrol quality assurance system is registered to
ISO 9001 affirming its commitment to known international
quality standards providing the strongest assurance of
product/service quality available.
ASSURED QUALITY & SERVICE COST LESS
SERVICE POLICY
RETURN MATERIAL PROCEDURE
Owners of Magnetrol may request the return of a control or
any part of a control for complete rebuilding or replacement.
They will be rebuilt or replaced promptly. Controls returned
under our service policy must be returned by Prepaid transportation. Magnetrol will repair or replace the control at no
cost to the purchaser (or owner) other than transportation if:
So that we may efficiently process any materials that are
returned, it is essential that a “Return Material Authorization”
(RMA) number be obtained from the factory, prior to the
material’s return. This is available through a Magnetrol local
representative or by contacting the factory. Please supply
the following information:
1. Returned within the warranty period; and
2. The factory inspection finds the cause of the claim to
be covered under the warranty.
If the trouble is the result of conditions beyond our control;
or, is NOT covered by the warranty, there will be charges for
labor and the parts required to rebuild or replace the equipment.
In some cases it may be expedient to ship replacement
parts; or, in extreme cases a complete new control, to
replace the original equipment before it is returned. If this is
desired, notify the factory of both the model and serial numbers of the control to be replaced. In such cases, credit for
the materials returned will be determined on the basis of the
applicability of our warranty.
No claims for misapplication, labor, direct or consequential
damage will be allowed.
1.
2.
3.
4.
5.
Company Name
Description of Material
Serial Number
Reason for Return
Application
Any unit that was used in a process must be properly
cleaned in accordance with OSHA standards, before it is
returned to the factory.
A Material Safety Data Sheet (MSDS) must accompany
material that was used in any media.
All shipments returned to the factory must be by prepaid
transportation.
All replacements will be shipped F.O.B. factory.
NOTE: See Electrostatic Discharge Handling Procedure on
page 6.
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93
Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317
Copyright © 2011 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
BULLETIN: 51-624.1
EFFECTIVE: March 2011
SUPERSEDES: June 1999