Coolmay CX3G - 8. Coolmay CX3 G PLC Communication User Manual; 8.1 Serial Port 1: RS232; 8.2 Serial Port 2: RS485(A B);RS232

CX3G/FX3GC PLC Programming manual
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8. Coolmay CX3G PLC Communication User Manual
CX3G PLC defaulted has a RS232 programming port, and two communication ports
( Rs232 or Rs485) can be added. Meanwhile, CANbus is also optional.
8.1 Serial port 1: RS232( PLC programming port)
Support Mitsubishi programming port protocol；Can be used to download PLC
program or communicate with devices which support MITSUBISHI programming
port protocol.
8.2 Serial port 2: RS485(A B)/RS232
Support MITSUBISHI programming port protocol,Mitsubishi BD board
protocol,RS protocol and MODBUS RTU protocol.
The special relays and registers related to this serial port are as below.
Functions
Serial
port
2(A/B)
Serial port
3(A1/B1)
CAN(H/
L)
Remark
Mitsubishi
programming port
protocol
M8196=0
M8192=0
-
26232 or higher version:
power lost can not be
retentive
RS port protocol
M8196=1
M8125=0
M8192=1
-
RS sending mark
M8122=1
M8402=1
M8422=
1
Need manual reset
RS sending completion
mark
-
-
M8425
Need manual reset
RS receiving
completion mark
M8123
M8403
M8423
Need manual reset
RS receiving process
M8124
M8404
M8424
Data is receiving