Flow-tronic IFQ MONITOR - Modbus RTU Output Connections and Parameters

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3.2.3.5 Modbus RTU output cable connections
1. Disconnect power to the IFQ Monitor.
2. Screw off the cover attachement screws (Figure 1 on page - 7 -) in order to access the connection
chamber.
3. Insert the cable(s) through the cable gland (Figure 1 on page - 7 -).
4. Install each wire into the terminal block (Figure 11) :
a. If available connect the ground cable in terminal N° 39.
b. Connect the RS485- in terminal N° 37 and the RS485+ in terminal N° 38.
5. Tighten each wire and then tug gently to make sure the connection is tight.
6. Tighten the cable gland where the cable goes through.
7. Install the connection chamber cover and screw the cover attachement screws back in.
Figure 11: Connections for Modbus RTU (slave) output
3.2.3.6 Modbus RTU output parameters
The IFQ Monitor is the slave device.
The serial communication has the following characteristics:
 Communication (COM PORT): RS485
 Protocol: MODBUS RTU
 Baud rate: 19200 bauds
 Number of bits: 8
 Parity: None
 Number of stop bits: 1
The IFQ Monitor uses the following MODBUS functions:
 03 “Read holding registers”
Used data types:
 Signed16 16 Bit signed integer
 Unsigned16 16 Bit unsigned integer
 Float32 32 Bit Floating Point
Word Order HI-LO = Hi Byte on lower register address
RS485 (-)
RS485 (+)
GND