Checkout the Hot Connect Group functionality. https://infosys.beckhoff.com/content/1033/ethercatsystem/2469078667.html This is a good way that the bus is running, when the modules are not there. The more complex thing is to adjust the EtherCAT slaves in the OpconEcMasterBase. You have to disable the StateChecks that your master tells "CheckedBusOk"
... View more
