Siemens F01222 fault code meaning

Series: S120-S150

CU: Basic clock cycle too small (no computation time available for communication

converter

Meaning: No time slice meeting the requirements has been defined. The port could not operate correctly because the alternating clock cycle could not be maintained.

Possible causes

Source: SINAMICS S120_S150 P2527

Series: S220

CU: Base cycle too short (no computation time available for communication

converter

Meaning: No time slice meeting the requirements has been defined. The clock cycle requirements for alternating cyclic transmission are not met, so the port cannot operate normally.

Possible causes

Source: SINAMICS S220 converter P2076