Coolmay L02 Series - Serial Port 3: RS485 (A1 B1)

Coolmay L02 Series PLC Programming Manual
https://en.coolmay.com/
68
Slave program:
The data display status of the host D300~D303 before and after program
execution is shown in the figure below.
8.4. Serial port 3: RS485 (A1 B1)
Support Mitsubishi programming port protocol, RS2 protocol and MODBUS
RTU protocol
The special relays and special registers involved in this serial port are as
follows:
Function Description
Serial
2(A/B)
Serial
3(A1/B1)
CAN(H/L)
Remarks
Mitsubishi programming port
M8196=0
M8192=0
-
Power failure does not keep
Freeport protocol function
M8196=1
M8125=0
M8192=1
-
RS/RS2 sending flag
M8122=1
M8402=1
M8422=1
Automatically reset at the end