Siemens F01221 fault code meaning

Siemens / F01221

Series: DCM-6RA80

CU: Base cycle too small

DC drive

Meaning:

Possible causes

Source: SINAMICS DCM, Parameter Manual, firmware version 1.5 SP2 (based on 5.1 SP2) P946

Series: G120-CU250S-2, S120-S150

CU: Base cycle too small

converter

Meaning: Closed-loop control/monitoring cannot maintain the specified cycle. The execution time of closed-loop control/monitoring is too long for the specified cycle, or the remaining computing time in the system is insufficient for closed-loop control/monitoring.

Possible causes

Source: SINAMICS G120, Control Unit CU250S-2 P1291; SINAMICS S120_S150 P2527

Series: G130-G150

CU: Base cycle too small

converter

Meaning:

Possible causes

Source: SINAMICS G130_G150 P1450

Series: S220

CU: Base cycle too short

converter

Meaning: Closed-loop control/monitoring cannot maintain the specified cycle. The execution time for closed-loop control/monitoring is too long for the specified cycle, or the remaining computation time in the system is insufficient for closed-loop control/monitoring.

Possible causes

Source: SINAMICS S220 converter P2076