Omron RX Series - Section 8 Communications Functions; Communication Specifications

8 Communications Functions
8 - 2
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
8-1 Communication Specifications
The 3G3RX-V1 Series has an RS485 communications capability that enables the inverter to
communicate with an external controller from its communications terminal block TM2 on the control
terminal block PCB.
Communications Specifications
Item ASCII format Modbus format Remarks
Transmission speed 2,400/4,800/9,600/19,200 bps
Selectable via Digital
Operator
Communications
method
Half-duplex communications
Synchronous system Start-stop synchronous system
Transmission code ASCII code Binary
Transmission mode Transmission starts with Least Significant Bit (LSB first)
Compatible interface RS485
Data bit length 7 or 8 bits 8 bits
Selectable via Digital
Operator
Parity No/Even/Odd
Selectable via Digital
Operator
Stop bit length 1 or 2 bits
Selectable via Digital
Operator
Startup method One-side start using host command
Wait time 10 to 1,000 [ms] 0 to 1,000 [ms]
Selectable via Digital
Operator
Connection form 1:N (N = 32 max.)
Station No. selectable
via Digital Operator
Error check
Overrun/Framing/BCC/
Vertical parity/Horizontal
parity
Overrun/Framing/CRC-16/
Horizontal parity