Sorry for the late reply.
Please check the parameter settings on the drive side. The error means that something is wrong there. As long as you did not connect any motor this can cause the problem.
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The offset is only valid in the MDT/DT of the drive itself and is not the address of the datum. So it will start from 0 at each drive/slave connected:
Also the addresses are also free chooseable in the PLC engineering tool:
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@ asti: I will answer you in your new topic:
https://developer.community.boschrexroth.com/t5/SDK/Cannot-store-data-in-configuration/m-p/26139
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