PCI MicroTrans EQ Manual

MICROTRANSEQ
MICROTRANSII
SPM-3000
SPM-4000
Modbus Communication
Operation & Maintenance Manual
Engineered for accuracy, applicability,
durability and simplicity

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated i Revision Level 004
TABLE OF CONTENTS
TABLE OF CONTENTS.............................................................................................................................i
1.INTRODUCTION .............................................................................................................................. 1
1.1.DESCRIPTION............................................................................................................................ 1
1.2.SAFETY....................................................................................................................................... 1
1.2.1.Electrical Connections.......................................................................................................... 1
1.2.2.Static Electricity.................................................................................................................... 1
2.MODBUS FIELD INSTALLATION................................................................................................. 2
2.1.MICROTRANSEQ MODBUS INSTALLATION INSTRUCTIONS .......................................... 2
2.2.MICROTRANSII MODBUS INSTALLATION INSTRUCTIONS............................................ 3
2.3.SPM-3000 MODBUS INSTALLATION INSTRUCTIONS...................................................... 4
2.4.SPM-4000 MODBUS INSTALLATION INSTRUCTIONS...................................................... 5
3.MODBUS FIELD CONNECTIONS.................................................................................................. 6
3.1.MICROTRANSEQ MODBUS CONNECTION ........................................................................... 6
3.2.MICROTRANSII MODBUS CONNECTION............................................................................. 7
3.3.SPM-3000MODBUS CONNECTION........................................................................................ 8
3.4.SPM-4000MODBUS CONNECTION........................................................................................ 9
3.5.DEVICE NETWORK CONNECTIONS................................................................................... 10
3.6.MODBUS COMMUNICATION BOARD & TERMINATOR SWITCH................................ 10
3.7.MODBUS SOFTWARE CONFIGURATION PARAMETERS............................................... 11
4.MICROTRANSEQ TECH MENUS .................................................................................................. 12
4.1.MICROTRANSEQ MODBUS ID............................................................................................... 12
4.2.MICROTRANSEQ BAUD RATE .............................................................................................. 12
5.MICROTRANSII TECH MENUS.................................................................................................... 13
5.1.MICROTRANSII MODBUS ID................................................................................................. 13
5.2.MICROTRANSII BAUD RATE................................................................................................ 13
6.SPM-3000 FIELD MENUS.............................................................................................................. 14
6.1.ACCESSING FIELD MENUS .................................................................................................. 14
6.2.SPM-3000 FIELD MENUS....................................................................................................... 15
6.3.SPM-3000 MODBUS ID........................................................................................................... 15
6.4.SPM-3000 BAUD RATE........................................................................................................... 15
7.SPM-4000 FIELD MENUS.............................................................................................................. 16
7.1.FIELD SETUP & INITIAL PASSWORD MENU.................................................................... 16
7.2.Modbus ID.................................................................................................................................. 16
7.3.BAUD RATE............................................................................................................................. 16
8.DEVICE OBJECTS.......................................................................................................................... 17
8.1.MICROTRANSEQ ...................................................................................................................... 17
8.2.MICROTRANSII........................................................................................................................ 18
8.3.SPM-3000................................................................................................................................... 19
8.4.SPM-4000................................................................................................................................... 20
8.5.MODBUS EXCEPTION CODES ............................................................................................. 21
9.TROUBLESHOOTING GUIDE...................................................................................................... 22

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 1 Revision Level 004
1. INTRODUCTION
1.1. DESCRIPTION
The MicroTransEQ, MicroTransII, SPM-3000 and SPM-4000 utilize the Modbus – RTU slave protocol
using the EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of
9.6Kbps to 115.2Kbps. Each device has a unique Modbus ID ranging from 1 to 254.
1.2. SAFETY
1.2.1. Electrical Connections
Before any electrical connections are made, ensure the POWER SWITCH is in the OFF position.
1.2.2. Static Electricity
The circuit board contains components which are susceptible to damage caused by static electrical
discharge. Should it be necessary to remove the circuit board from the enclosure, appropriate
precautions must first be taken to ensure that the operator and the circuit board are at the same electrical
potential.

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 2 Revision Level 004
2. MODBUS FIELD INSTALLATION
If a Modbus board is being added or replaced, follow the appropriate product installation instructions
shown below.
2.1. MICROTRANSEQ MODBUS INSTALLATION INSTRUCTIONS
Step 1. Remove the 4 cover screws
Step 2. Verify MicroTransEQ power switch is in the OFF position.
Step 3. Remove the 2 removable wiring plugs from the MicroTransEQ board.
Step 4. Remove the 4 MicroTransEQ board mounting screws and carefully flip the board
over to view the back side.
Step 5. Install the Modbus communication board making sure the connectors are aligned
correctly and not offset (see drawing below).
Step 6. Reinstall the MicroTransEQ board using the 4 mounting screws
Step 7. Set MicroTransEQ power switch to the ON position.
BACK SIDE OF MICROTRANSEQ BOARD
MODBUS COMMUNICATION
BOARD MOUNTING LOCATION

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 3 Revision Level 004
2.2. MICROTRANSII MODBUS INSTALLATION INSTRUCTIONS
Step 1. Remove the 4 cover screws
Step 2. Verify MicroTransIIpower switch is in the OFF position.
Step 3. Remove all removable wiring plugs from the MicroTransII board.
Step 4. Remove the 4 MicroTransII board mounting screws and carefully flip the board
over to view the back side.
Step 5. Install the Modbus communication board making sure the connectors are aligned
correctly and not offset (see drawing below).
Step 6. Reinstall the MicroTransII board using the 4 mounting screws
Step 7. Set MicroTransII power switch to the ON position.
BACK SIDE OF MICROTRANSII BOARD
MODBUS COMMUNICATION
BOARD MOUNTING LOCATION

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 4 Revision Level 004
2.3. SPM-3000
MODBUS INSTALLATION INSTRUCTIONS
Step 1. Remove the 4 cover screws
Step 2. Verify SPM-3000 power switch is in the OFF position.
Step 3. Remove the 4 countersink screws securing the SPM-3000 to the wall box.
Step 4. Remove the SPM-3000 board and carefully flip the board over to view the back
side.
Step 5. Remove the 4 guard plate mounting screws and guard plate.
Step 6. Install the Modbus communication board making sure the connectors are aligned
correctly and not offset (see drawing below).
Step 7. Reinstall the guard plate using the 4 mounting screws.
Step 8. Reinstall the SPM-3000 board into the wall box using the 4 countersink mounting
screws
Step 9. Set SPM-3000 power switch to the ON position.
BACK SIDE OF SPM-3000 BOARD
Room ID:
Modbus ID #:
Instance:
213
MAC #:
4567810 9
1112
Serial #:
Output:
W.O.#:
14 13
(BLACK TUBE)
5
1
2
3
4
(CLEAR TUBE)
ROOM
10
8
7
6
9
14
12
13
11
REFERENCE
PING SWITCH
NEURON ID
ROOM
J1
J2
J3
J4
NETWORK
-
+
-
+CONNECTION TO RPM
J4
J3
J2 - PROCESS OUTPUT
+ PROCESS OUTPUT
PRESSURE ALARM
NC
NO
COM OFF MODE SELECT
CLOSED = OFF
EARTH GROUND
24VAC
J1
COMMUNICATION
MODBUS COMMUNICATION
BOARD MOUNTING LOCATION GUARD PLATE

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 5 Revision Level 004
2.4. SPM-4000
MODBUS INSTALLATION INSTRUCTIONS
Step 1. Remove the 6 cover screws
Step 2. Verify SPM-4000 power switch is in the OFF position.
Step 3. Remove the 6 countersink screws securing the SPM-4000 to the wall box.
Step 4. Remove the SPM-4000 board and carefully flip the board over to view the back
side.
Step 5. Install the Modbus communication board making sure the connectors are aligned
correctly and not offset (see drawing below).
Step 6. Reinstall the SPM-4000 board into the wall box using the 6 countersink mounting
screws
Step 7. Set SPM-4000 power switch to the ON position.
MODBUS COMMUNICATION
BOARD MOUNTING LOCATION
BACK SIDE OF SPM-4000 BOARD
GUARD PLATE CONNECTOR & ID LABEL
SPACE 1
TRANSDUCER
SPACE 2
TRANSDUCER

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 6 Revision Level 004
3. MODBUS FIELD CONNECTIONS
3.1. MICROTRANSEQ MODBUS CONNECTION
Attach the Modbus network to MicroTransEQ connector J2 pin 9 (Data +) and pin 10 (Data -).
J1
1 2 3 111213141516171845678
J3 (ALARM OPTION)
J2
ON
OFF
POWER
SWITCH
ENTER
ESC
109
LON
INPUT
TEMP.mA
V
PROC.
OUTPUT
mA
V
10V
5V
S1 S2 S4
24VAC / DC
+ PROCESS OUTPUT
EARTH GROUND
- PROCESS OUTPUT(GND)
5
7
6
J2
4
3
J1
2
1
16
15
14
13
NC
NO
COM
LOW ALARM
HIGH ALARM
NO
NC
COM
J3 (ALARM OPTION)
12
11
- NETWORK COMMUNICATIONS
+ NETWORK COMMUNICATIONS
+ TEMPERATURE INPUT
- TEMPERATURE INPUT(GND)
10
9
18
17
AUX. DI
8
+ 24VDC LOOP POWER

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 7 Revision Level 004
3.2. MICROTRANSII MODBUS CONNECTION
Attach the Modbus network to MicroTransII connector J5 pin 27(Data +) and pin 28 (Data -).
LCD DISPLAY
ESC
J1 J2 J3 J5
123 6
54 1112 13 7161514 1817 2827
ENTER
ON
OFF
POWER SWITCH DISPLAY
2221 252324 26
J4
19208910
AINP
mA
V
TMP SP ECO PRO CNTTMP
AOUT
LON
SVC
5
4
3
2
1
26
25
24
23
22
21
28
27
18
17
16
15
14
13
12
11
20
19
9
8
7
6
10
24VAC/DC
EARTH GROUND
+ PROCESS OUTPUT
- PROCESS OUTPUT (GND)
+24VDC LOOP POWER
+ TEMPERATURE INPUT
- TEMPERATURE INPUT (GND)
+ TEMPERATURE OUTPUT
- TEMPERATURE OUTPUT (GND)
J1
J2
+ PURGE HOLD
- PURGE HOLD
+SYSTEM START
- SYSTEM START
+ CONT SP.
- CONT. SP.
+ ECON. OVERRIDE
- ECON OVERRIDE
+ CONT. OUTPUT
- CONT. OUTPUT
COM
NO
NC
COM
NO
NC
HIGH ALARM
LOW ALARM
+ NETWORK COMMUNICATIONS
- NETWORK COMMUNICATIONS
J3 J4
J5

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 8 Revision Level 004
3.3. SPM-3000MODBUS CONNECTION
Attach the Modbus network to SPM-3000 connector J4 pin 13 (Data +) and pin 14 (Data -).
Room ID:
Modbus ID #:
Instance:
213
MAC #:
4567810 91112
Serial #:
Output:
W.O.#:
14 13
(BLACK TUBE)
5
1
2
3
4
(CLEAR TUBE)
ROOM
10
8
7
6
9
14
12
13
11
REFERENCE
PING SWITCH
NEURON ID
NETWORK CONNECTION
-
+
CONNECTION TO RPM
-
+
- PROCESS OUTPUT
+ PROCESS OUTPUT
NC
NO SPACE PRESSURE ALARM
COM
OFF MODE SELECT
OPEN = NORMAL / CLOSED = OFF
EARTH GROUND
24VAC (50/60HZ)
CONNECTION LABEL
ID LABEL
REFERENCE PRESSURE
CONNECTION
(BLACK TUBING)
ROOM PRESSURE
CONNECTION
(CLEAR TUBING)
GUARD PLATE
ROOM
J1
J2
J3
J4
NETWORK
-
+
-
+CONNECTION TO RPM
J4
J3
J2 - PROCESS OUTPUT
+ PROCESS OUTPUT
PRESSURE ALARM
NC
NO
COM OFF MODE SELECT
CLOSED = OFF
EARTH GROUND
24VAC
J1
J4
J3
J2
J1
14
13
12
11
10
9
8
7
6
5
4
3
2
1
COMMUNICATION

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 9 Revision Level 004
3.4. SPM-4000MODBUS CONNECTION
Attach the Modbus network to SPM-4000 connector J4 pin 39 (Data +) and pin 40 (Data -).
BACK SIDE OF SPM-4000 BOARD
SPACE 1
TRANSDUCER
SPACE 2
TRANSDUCER
ROOM PRESURE
CONNECTION
(CLEAR TUBING)
REFERENCE PRESURE
CONNECTION
(BLACK TUBING)
ROOM PRESURE
CONNECTION
(CLEAR TUBING)
REFERENCE PRESURE
CONNECTION
(BLACK TUBING)
J1
123
45
6
7
89
101112131415161718192021222324252627282930313233343536
J2J5J6
37383940
J3J4
SYSTEM START
DOOR INTERLOCK
CONTROLLER SETPOINT +
CONTROLLER SETPOINT -
CONTROLLER OUTPUT +
CONTROLLER -
COM
AUX. RELAY
NC
NO
SPACE 1 + PROCESS OUTPUT
SPACE 1 - PROCESS OUTPUT
SPACE 2 + PROCESS OUTPUT
SPACE 2 - PROCESS OUTPUT
POSITIVE ROOM SELECT
NEGATIVE ROOM SELECT
GROUND
COM
NO
NC
SPACE PRESSURE ALARM
NETWORK COMMUNICATION
RPM COMMUNICATION
TEMP. INPUT +
TEMP. INPUT -
RH INPUT +
RH INPUT -
CFM INPUT +
CFM INPUT -
AUX. INPUT +
AUX. INPUT -
+15VDC
+15VDC
AUX. DI
LOOP POWER
EARTH GROUND
24VAC (50/60HZ)
1
2
3
4
5
6
7
8
9
10
12
13
14
15
11
16
18
19
20
21
17
22
24
25
23
26
28
29
30
31
27
32
34
35
33
36
+
-
+
-
3 POSITION POS/NEG/OFF
ROOM SELECT SWITCH
J2
J1 J3
J4
J5
J6
39
40
37
38

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 10 Revision Level 004
3.5. DEVICE NETWORK CONNECTIONS
(Note: Recommended network wire should be low capacitance, shielded 22 or 24 AWG twisted
pair with PVC jacket such as Belden Part numbers 9841, 3105A or equivalent).
CONNECT WIRE SHIELD
BUILDING AUTOMATION SYSTEM
(FOR PROPER OPERATION, MODBUS
AUTOMATION SYSTEM
MODBUS BUILDING
-
MODBUS
+
CONNECT WIRE SHIELD
TO EARTH GROUND TO EARTH GROUND
MODBUS
+-
DEVICE 1 DEVICE 3
CONNECT WIRE SHIELD
TO EARTH GROUND
DEVICE 2
-
+- +
SWITCH IS OFF
TERMINATOR SWITCH IS OFF
TERMINATOR SWITCH IS ON
TERMINATOR
MODBUS MODBUS
MUST HAVE THE TERMINATOR SWITCH
IN THE ON POSITION)
3.6. MODBUS COMMUNICATION BOARD & TERMINATOR SWITCH
For proper Modbus operation, the device that is electrically installed at the end of the network may
require the Terminator switch be moved to the ON position to prevent line and data reflection. If
Terminator is required, it must be applied to both physical ends of the network at the two end devices.
All other devices should have the terminator switch in the OFF position. The communication board is
located on the back side of the main board. See picture below for jumper location.

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 11 Revision Level 004
3.7. MODBUS SOFTWARE CONFIGURATION PARAMETERS
Communication type: Serial
Protocol: RTU - Slave
EQ Modbus ID: First device starts at 1 and increments up to 254
Baud Rate: 9.6K, 19.2k, 38.4K(Default), 57.6K & 115.2K
Data bits: 8
Parity: None
Stop bit: 1
Flow Control: None
Time Out: 150msec (minimum)
Poll time: 100msec (minimum)
Address Type: Decimal 40000 – 40999 (Holding Register address)
Byte order: Motorola (Default) High Byte bits 15 - 8, Low Byte bits 7 - 0
Start Address: 0-based
Max. block size: (Holding registers): 8
Function Code: (03X) Read registers, (06X) Write single register, (10X) Write multiple register
(Note 1: When using a USB to RS-485 converter, make sure to set Echo to OFF)
(Note 2: The MicroTransEQ, MicroTransII, SPM-3000 and SPM-4000 Modbus protocol supports
the “Broadcasting Address” function – This function allows for writing to multiple devices at one
time).

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 12 Revision Level 004
4. MICROTRANSEQ TECH MENUS
4.1. MICROTRANSEQ MODBUS ID
The Modbus ID menu allows the user to set a unique device address when connecting to a Modbus
network. To verify Modbus ID value or make a value change, enter the Tech Menu by depressing the
up/down buttons for 3 seconds (reference section 3.1 MicroTransEQ Modbus Connections drawing).
Enter 01000 for the password and scroll down the menus until Modbus ID is highlighted and press the
ENTER button. Use the up/down/right/left buttons to enter the Modbus ID. Press the Enter button and
than the ESC button to exit the menu.
Tech. Config.
Password: 0000

4PT Flow Corr Modbus ID
Modbus ID (Range = 01 to 254)
Baud Rate
(001)
4.2. MICROTRANSEQ BAUD RATE
The Baud Rate menu allows the user to set a unique network baud rate. The Modbus Baud rates are:
9.6K / 19.2K / 38.4K / 57.6K / 115.2K. The default is 38.4K.
Tech. Config.
Password: 0000

4PT Flow Corr Baud Rate
Modbus ID (9.6, 19.2, 38.4, 57.6,
115.2)
Baud Rate 
(38.4) Kbps

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 13 Revision Level 004
5. MICROTRANSII TECH MENUS
5.1. MICROTRANSII MODBUS ID
The Modbus ID menu allows the user to set a unique device address when connecting to a Modbus
network. To verify Modbus ID value or make a value change, enter the Tech Menu by depressing the
up/down buttons for 3 seconds (reference section 3.2 MicroTransII Modbus Connections drawing).
Enter 01000 for the password and scroll down the menus until Modbus ID is highlighted and press the
ENTER button. Use the up/down/right/left buttons to enter the Modbus ID. Press the Enter button and
than the ESC button to exit the menu.
Tech. Config.
Password: 1000

Correction Coeff. Modbus ID
4PT Flow Corr
Pre-Filter
(01)
MAC Address
Instance Code (range = 01 to 254)
Modbus ID 
Baud Rate
Factory Defaults
5.2. MICROTRANSII BAUD RATE
The Baud Rate menu allows the user to set a unique Modbus network baud rate of 9.6K/38.4K, 57.6K &
115.2Kbps. The default is 38.4K.
Tech. Config.
Password: 1000

Correction Coeff. Baud rate
4PT Flow Corr (9.6, 19.2, 38.4, 57.6, 115.2)
Pre-Filter
MAC Address (38.4)Kbps
Instance Code
Modbus ID
Baud Rate 
Factory Defaults

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 14 Revision Level 004
6. SPM-3000 FIELD MENUS
6.1. ACCESSING FIELD MENUS
Perform the following steps to enter the Field Menus and make changes. Refer to Figure 1 below for
component locations.
3.1.1 Depress and hold the ZERO (S3) button for 3 seconds.
3.1.2 Depress the ZERO button repeatedly to scroll up through the Field Menus or repeatedly
depress the SPAN (S4) button will scroll down through the menus (see section 6.2).
3.1.3 To enter a specific Field Menu, depress the ACKNOWLEDGE (S2) button.
3.1.4 To make a change to a value or selection, depress the ACKNOWLEDGE button
repeatedly to select the digit you want to change and then depress the ZERO button to
increment the value or the SPAN button to decrement the value. Each button depression
will change the value by 1 count.
3.1.5 Once the change is made, depress and hold the ACKNOWLEDGE button for 3 seconds.
The new value or selection will be saved, the text <OK> will be displayed and the display
will return to the menu.
3.1.6 To return to the process display, depress and hold the ZERO and SPAN buttons for 3
seconds. If the SPM-3000 senses no button activity for 2 minutes it will return to the
process display.
Figure 1
POWER SWITCH
CALIBRATION STATUS
INDICATION
S2 ALARM
ACKNOWLEDGE
ZERO (S3) AND SPAN (S4) MENU &
CALIBRATION SWITCHES
ROOM CALIBRATION
PRESSURE CONNECTION
REFERENCE CALIBRATION
PRESSURE CONNECTION
S1-1 AUDIBLE ALARM OFF / ON
S6 PROCESS OUTPUT
SELECT (mA / V)
STATUS
NORMAL
ALARM
MODE
POSITIVE
NEGATIVE
OFF
ALARM
ACKNOWLEDGE
AUDIBLE
ALARM
mA V
S6
S1
ROOM REF
S4
SPAN
S3
ZERO
1
2ON
S2
CAL (DL8)
S5
ON

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 15 Revision Level 004
6.2. SPM-3000 FIELD MENUS
Field Menus
Low Alarm Value
High Alarm Value
Alarm Delay
Audible Alarm
Display Filter
Operation Mode
MAC Code
Instance
Baud Rate
6.3. SPM-3000 MODBUS ID
The MAC Code menu allows the user to set a unique device address (001-254) when connecting to a
communication network.
Menu MAC Code
MAC Code 001
6.4. SPM-3000 BAUD RATE
The Baud Rate menu allows the user to select between the following Baud Rates: 9.6K, 19.2K, 38.4K,
57.6K & 115.2K. The default is 38.4K.
Menu BaudRate
BaudRate 38.4

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 16 Revision Level 004
7. SPM-4000 FIELD MENUS
7.1. FIELD SETUP & INITIAL PASSWORD MENU
To enter the Field Setup menu from the process display, the user will need to depress the UP/DOWN
buttons simultaneously. The Field Setup Password menu will appear. The initial password shipped
from the factory is 00000.
Field Setup
Password
(00000)
7.2. SPM-4000 MODBUS ID
The Modbus ID menu allows the user to set a unique device address when connecting an SPM-4000 to a
Modbus communication network.
Field Setup Menu Mod ID
More Options <up>
RPM MAC Adr (001)
RPM Instance #
Modbus ID (range = 001 to 254)
Baud Rate
7.3. SPM-4000 BAUD RATE
The Baud Rate menu allows the user to set a unique Network Baud Rate of 9.6K, 19.2K, 38.4K, 57.6K
& 115.2Kbps. The default is 38.4K.
Field Setup Menu Baud rate
More Options <up>
RPM MAC Adr (9.6, 19.2, 38.4, 57.6, 115.2K)
RPM Instance #
Modbus ID (38.4K)
Baud Rate 
Password Timeout
Field Password

Modbus Communication Operation & Maintenance Manual
Paragon Controls Incorporated 17 Revision Level 004
8. DEVICE OBJECTS
8.1. MICROTRANSEQ
(Note: In the CC column, an "R" denotes a read only object and a "W" denotes a Read/Write object)
Item Description Register
Number CC Data Type Data Value Descriptions
1* Pressure Input 40369 R Signed Short
2 Flow Input 40370 R Signed Long
3 Temperature Value 40459 W Signed Short To write a temperature value from the network, set “Temperature Source” data value to 2 (Network).
See item 20 below.
4 Temp. Fixed Value 40457 W Signed Short
5* Pressure Operating
Range 40359 R Signed Short
6* Pressure High Alarm
Value 40424 W Signed Short
7* Pressure Low Alarm
Value 40425 W Signed Short
8 Flow Operating Range 40362 R Signed Long
9 Flow High Alarm
Value 40416 W Signed Long
10 Flow Low Alarm Value 40418 W Signed Long
11 Process Type 40150 R Word 0=Flow, 1=Pressure
12 High Alarm Enable 40430 W Word 0=Off, 1=On
13 High Alarm Delay 40428 W Word 0 to 999 seconds
14 High Alarm Out 40081 R Word 0=No Alarm, 1=Alarm
15 Low Alarm Enable 40431 W Word 0=Off, 1=On
16 Low Alarm Delay 40429 W Word 0 to 999 seconds
17 Low Alarm Out 40080 R Word 0=No Alarm, 1=Alarm
18 Engineering Unit 40128 R Word See Table 1 below
19 Temperature Unit 40450 W Word 0=°F, 1=°C
20 Temperature Source 40455 W Word 0=Variable, 1=Fixed, 2=Network
21 Decimal Point 40133 R Word 4 = .XXXX / 3 = X.XXX 2 = XX.XX / 1 = XXX.X
* MicroTransEQ responds to a read request from the master for these parameters by sending the value of
these parameters without any decimal points. So it is important that the Modbus software that reads
these parameters must also read the decimal point information or the programmer must set it manually in
the software to display the value correctly (See example on next page).
Table 1
Engineering Unit Data Value descriptions
Unit
Value
Actual
Flow
Unit
Unit
Value Standard Flow Unit Unit Value
Actual
Velocity
Unit
Unit
Value
Standard
Velocity
Unit
Unit
Value Pressure Unit
0 ACFM 0 SCFM 0 AFPM 0 SFPM 0 Inch w.c.
1 L/S 1 SCFH 1 Am/S 1 Sm/S 1 Pa
2 Am3/S 2 SL/S 2 % 2 % 2 KPa
3 % 3 Sm3/S 3 mm w.c.
4 Sm3/HR 4 %
5 %