A forum for topics related to the scope of Modicon PAC offers and ecosystem along the whole lifecycle: Modicon M580 and 340, EcoStruxure Control Expert, EcoStruxure Process Expert (Unity Pro) and more.
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Posted:
yesterday
m172 plc unable to start communication
Unable to connect to the M172 PLC via the usb. We had connections one day and then the next day received the "Unable to Start communications, Choose "on-line / Setup Communications" to configure it. The configuration has not changed. The PC has been restarted and the PLC has been restarted but sill not able to communicate.