Connection Examples - Omron NX-series User Manual

4 Serial Communications
4-4-5

Connection Examples

An example of connecting an OMRON 3G3MX2-V1 Inverter via RS-422A/485 is given below.
 Serial Communications Terminals
RS-422A/485 Option Board
NX1W-CIF11/CIF12
 Operation Setting DIP Switches on the Back of the NX1W-CIF11/CIF12 Option
Board
For an NX1W-CIF11
SW1
CIF11
SW No.
SW1 1
2
3
4
5
6
 Settings on 3G3MX2-V1 Inverters
• Parameter Settings
Communication Speed Selection (Baud Rate Selection)
Communication Station No. Selection
Communication Parity Selection
Communication Stop Bit Selection
Communication Wait Time
Communication Selection
*1. When the CPU Unit fails to receive a response frame, increase the set value.
• Switch Setting
Set the terminating resistor selector switch to ON.
4 - 24
RDA- RDB+ SDA- SDB+ SHLD
For an NX1W-CIF12
SW1
CIF12
Setting
SW No.
SW1 1 ON
2 ON
3 ON
4 OFF
SW2 1 ON
2 ON
Item
NX-series NX1P2 CPU Unit Built-in I/O and Option Board User's Manual (W579)
3G3MX2-V1
Inverter
RS-
RS+
SW1 SW2
SW1 SW2
Setting description
With terminating resistance
Two-wire type
Two-wire type
(Not used)
With RS control for receive data
With RS control for send data
Set this to match the serial port setting.
Set a desired value.
Even parity
1 bit
*1
0 ms
Modbus communication
Set value