Hello, which version do you use? there was an issue, that sometimes the last EtherCAT device could not be found. Please add another module in the IO configuration, even if it is not available, and check the behavior. This bug was solved by RM21.11.2, provided end of January 2022. If you don't succeed, please send the EtherCAT ESI file of the Wago to us! kind regards
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