Siemens 877 fault code meaning
Siemens / 877
Series: SIMODRIVE 611U
Output function %u not permitted in the current mode
servo drive
Meaning: The function number, used as output, may not be used in the actual operating mode.
Possible causes
Source: SIMODRIVE 611 universal Function Manual FBU 05/2010 (EN, Siemens official site) 7.3