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9 Communication
9.3 HMI Monitoring Protocol
9.3 HMI Monitoring Protocol
1) Hardware connection
During communication through COM0, devices are connected through RS-422. Only the downloading port
can be used. During communication through COM1, devices are connected through RS-485. The wiring
terminal is used.
2) Software conguration
3) Protocol description
The HMI monitoring protocol is an internal PLC protocol. It is used for communication between AutoShop
and PLC. Through this protocol, AutoShop can erase, read, and download user programs, and remotely
supervise, adjust, and control the PLC. AutoShop can supervise and change any PLC elements, start, and
stop the PLC.
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