How to make RS485 RS422 RS232 cable?
1. RS485 Wiring diagram
RS422 Wiring diagram
LX3V series PLC can’t support RS232
| 2------------- | 3 |
| 3------------- | 2 |
| 5------------- | 5 |
Com1 support RS485 and RS422,Please check the following picture.
(If PLC points>=24 point PLC support COM1 RS485/RS422 and COM2 RS485,for example:LX3V-1410. total 24 points
If PLC points< 24 points, plc only support COM1 RS422 and COM2 RS485,for example LX3V-0806/LX3V-1208)
Our Com2 support RS485,Please check the following picture.
LX3V-0806/LX3V-1208 plc only can support COM1 RS422 and COM2 RS485.
LX3V-0806/LX3V-1208 plc com2 rs485 port is in below.NoteLX3V-0806/LX3V-1208 plc can not support connect module.because it does not with module port)
2.PLC COM2(please check more detailed in modbus demo)
PLC COM2 could support Wecon PLC protocol and Modbus RTU protocol.So user need to set plc parameter in D8120 and D8126 to choose use which protocol.
For example(Wecon HMI connect Wecon PLC COM2 by Wecon PLC protocol)
HMI parameter is in the picture below.(Setting--->Communication)
PLC program example.
D8120 means communication parameter format(9600,1,7,EVEN)---->D8120=10000110(2)=86(Hex)
D8126=01H means use Wecon PLC protocol.
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