There is no switch mode button, so I can't switch service mode to operation mode.

[elmo]

[bostroemc]

Which system apps do you have installed?  Make sure that the PLC and EtherCAT Master apps are at a version level consistent with the system apps:

Based on the color scheme of the image on the right in your original post, it appears that you have may have an inconsistency.

[CodeShepherd · Accepted solution]

I agree with @bostroemc. You are using 1.20 apps on a system that is in version 2.x. This will not work as they are not compatible. Please use the PLC and EtherCat app of the same 2.x version then your system apps.