Omron M1 Series User Manual page 653

8-1
Communications Specifications
The 3G3M1 Series Inverter has the RS-485-compliant Modbus communication function as standard,
which enables communications with external network controllers. The basic specifications of this com-
munications function are provided in the table below.
Item
Protocol
Transmission speed
Synchronous system
Transmission code
Transmission mode
Compatible interface
Data bit length
Parity
Stop bit length
Startup method
Wait time
Connection form
Error check
Communications cable
length
M1 Series Standard Type User's Manual (I669)
Description
Modbus communication (Slave)
2,400, 4,800, 9,600, 19.2 k, 38.4 k, 57.6 k, 76.8 k, 115.2
kbps
Start-stop synchronous system
Binary
LSB first (Transmission starts with Least Significant Bit)
RS-485
8 bits
No/Even/Odd
1 or 2 bits
One-side start by host command
Silent interval 0.00 to 1.00 [s]
1: N (N = 247 max.)
(32 units max. connectable without repeaters)
Overrun/Framing/CRC-16/Horizontal parity
500 m
8 Communications Functions
Remarks
Selectable via parame-
ter
Selectable via parame-
ter
Selectable via parame-
ter
-
Selectable via parame-
ter
Selectable via parame-
ter
8
8-3