ABB ac500 to acs355 drives failure over profinet
I am struggling with an application where I have an ac585 hooked up to 10 remote MCCs that each have a varying amount of CI502s and acs355s. We are communicating via profinet on a cm579 card. The total profinet in count is about 85 devices including the remote io and drives. The problem we have been having is that once we get about 35 io points online the network will crash giving us a comms coupler watchdog error. We can operate with one or two mccs online but once we to 35 it craps out. We have configured the drives and plc by the books and can run just fine up to a certain point. Any suggestions on what be going wrong?
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