Siemens 121 fault code meaning

Series: SIMODRIVE 611U

Jog 1, jog 2, or handwheel valid simultaneously

servo drive

Meaning: The input signals ”jog 1”, ”jog 2” or ”activate handwheel” were simultaneously activated.

Possible causes

Source: SIMODRIVE 611 universal Function Manual FBU 05/2010 (EN, Siemens official site) 7.3