Coolmay CX3G - Serial Port 3:RS485(A1 B1)

CX3G/FX3GC PLC Programming manual
www.coolmayplc.com
49
8.3 Serial port 3:RS485(A1 B1)
Support Mitsubishi programming port protocol,RS2 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
mark
M8124
M8404
M8424
Data is receiving
RS command 8/16 bits
differentiation mark
M8161
M8161
M8161
RS command CAN
master-slave mark
-
-
M8426
M8426=0 master-slave
mode, M8426=1
multi-device mode
RS command end
operation settings
0
1
2
MODBUS RTU
M8196=1
M8192=1
-