Could a bit describe, what you like to achieve?
If you like to have some kind of maximum project including several EtherCat slaves that should be deactivate while runtime, this is currently not possible.
The only possible function is to deactivate the device in ctrlX IO Engineering before loading the configuration to the EtherCat master. Then your whole topology acts like this device does not exist at all. Beware that also the EtherCat addresses of the following devices will change.
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