Omron 3G3RX User Manual

4-145
4-4 Communication Function
4
Functions
4-4 Communication Function
•This function allows the Inverter to communicate with an external controller via the RS485 interface
from the TM2 terminal on the Inverter's control terminal block board.
Communication Specifications
<RS485 Port Specifications and Connections>
For the RS485 communication function, use the TM2 terminal on the control terminal block board.
The following wires are recommended for TM2:
Item ASCII method ModBus-RTU method Note
Transmission speed 2400/4800/9600/19200 bps
Select using
the Digital Operator.
Communication
method
Half-duplex communication
Synchronous system Start-stop synchronous system Asynchronous system
Transmission code ASCII code Binary
Transmission mode LSB first
Compatible interface RS-485
Data bit length 7 or 8 bits 8 bits
Select using
the Digital Operator.
Parity No parity/Even/Odd
Select using
the Digital Operator.
Stop bit length 1 or 2 bits
Select using
the Digital Operator.
Starting method One-side start using host command
Wait time 10 to 1000 [ms] 0 to 1000 [ms]
Set using
the Digital Operator.
Connection 1:N (N = 32 max.)
Use the Digital Operator
to select a station No.
Error check
Overrun/Framing
BCC/Vertical/Horizontal parity
Overrun/Framing
CRC-16/Horizontal parity
Terminal
abbreviations
Description
SP Transmission/Reception (+)
SN Transmission/Reception (-)
RP Termination resistor enabling terminal
SN Termination resistor enabling terminal
Control terminal
block
Control terminal
block board
SP
SP
SN
SN
RP
RP
SN
SN

Omron 3G3RX Specifications

General

Brand	Omron
Model	3G3RX
Category	DC Drives
Language	English