Siemens 6RA80 DC Drive
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Sep 21, 2024 6:14 am
A01921 alarm in siemens 6RA80 DC Drive indicate Receive setpoints after To. This means output data of PROFIBUS master (setpoints) received at the incorrect instant in time within the PROFIBUS clock cycle.
- check bus configuration.
- check parameters for clock cycle synchronization (ensure To > Tdx).
