Siemens F081 fault code meaning
Siemens / F081
Series: 6RA70
CB/TB Core clock error
DC drive
Meaning: CB/TB did not increment the monitoring counter within 800ms. Possible fault causes: The CB/TB board is damaged. The CB/TB board is inserted incorrectly. Code of the i015 board: 1 TB or board 1 CB 2 Board 2 CB.
Possible causes
Source: 6ra70_c P438