COM 1 [RS485]4w 9-pin D port
Mitsumishi I PLC FX series CPU
RS422 port 8-pin Din round port
1 RX--4 TX--
2 RX+-7 TX+
3 tx-1RX--
4 TX+ - 2 RX+
5 GND-3 GNDs
9 highlights of selected event planning
I. Background of the event
After the sports meeting, the students gradually became familiar with the s