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jshepardJul 25, 2025
How to troubleshoot no communication from Lenze AC Tech Control Unit option module?
- HHoward MooreJul 26, 2025
If the Lenze AC Tech Control Unit option module has no communications, it may be due to several reasons. First, the module might not be initialized: verify the drive to module connection and check parameters P400 and P402. Second, PROFIBUS-DP settings might be incorrect: check P410 and P411; if unsure, reset PROFIBUS-DP parameters to factory default using P403. Third, improper wiring could be the cause: check the wiring between the PROFIBUS-DP network and communication module, ensure the terminal block is properly seated, and check the connection between the module and the drive.
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