F07825 Drive: Unit Changeover fault in siemens drive

F07825 Drive: Unit Changeover fault in siemens drive indicates that the fault during automatic switchover of drive data sets. 

Cause: 
Logic requesting a dataset (DDS) that is not configured. 

Remedy: 
1. 
Check PLC logic for dataset bits (Bit 0/1). 
2. Ensure all DDS are commissioned.

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