Siemens alarm 22050: [Channel %1: ] Block %3 spindle %2 no transition from speed control mode to position control mode

What it means

For spindle positioning the drive must hand over cleanly from speed control to position control inside a defined window. The transition did not take place, so the positioning command (SPOS/M19) is aborted.

Likely causes

• spindle encoder signals missing or implausible during the handover
• position loop gain/speed controller tuning prevents settling inside the window
• drive not enabled or not fully commutated at the moment of handover
• handshake timing between NCK and drive (M19/SPOS sequence) disturbed

Replacement parts

We supply the following units for this alarm — tested, warranty-backed:

• 6SN1118 control board (SIMODRIVE 611D)

  drive · Check if others ruled out

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• 6SL3055 measurement/encoder module (SINAMICS S120)

  drive · Check if others ruled out

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