Siemens 721 fault code meaning
Siemens / 721
Series: SIMODRIVE 611U
Spindle speed too high
servo drive
Meaning: As a result of the high spindle speed and the interpolation clock cycle (P1010), the modulo value can no longer be correctly taken into account. The alarm is initiated, if jerky equalization motion occurs -e.g. due to incorrect parameter values.
Possible causes
Source: SIMODRIVE 611 universal Function Manual FBU 05/2010 (EN, Siemens official site) 7.3