Hallo,
I'm supposed to write monitoring application of PLC. I've got following idea. I'd like to disconnect HMI (Mac40+) from PLC CPU (A2AS1) and connect through programming cable PC, witch will read proper data and store it in database (through Mitsubishi MX Components). The idea is quite simple but I've got some hardware doubts:
1. Is it safe to disconnect HMI from PLC CPU while whole system works, and connect PC with SC09 cable ? I don't want to shut down everything to connect PC, but I'm afraid that COM port in PC or CPU will be damaged.
2. Will system work without HMI ? I mean does HMI has influence on CPU work ?
I forgot to mention that HMI is only for monitoring states of system. Human is not needed to start system.
I'm supposed to write monitoring application of PLC. I've got following idea. I'd like to disconnect HMI (Mac40+) from PLC CPU (A2AS1) and connect through programming cable PC, witch will read proper data and store it in database (through Mitsubishi MX Components). The idea is quite simple but I've got some hardware doubts:
1. Is it safe to disconnect HMI from PLC CPU while whole system works, and connect PC with SC09 cable ? I don't want to shut down everything to connect PC, but I'm afraid that COM port in PC or CPU will be damaged.
2. Will system work without HMI ? I mean does HMI has influence on CPU work ?
I forgot to mention that HMI is only for monitoring states of system. Human is not needed to start system.
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