Siemens 602 fault code meaning
Siemens / 602
Series: SIMODRIVE 611U
Encoderless open-loop torque control operation is not permitted
servo drive
Meaning: In the IM mode, open-loop torque controlled operation was selected via an input terminal or via PROFIBUS-DP or the bus interface.
Possible causes
Source: SIMODRIVE 611 universal Function Manual FBU 05/2010 (EN, Siemens official site) 7.3