axismd.ai
Siemens SINUMERIK Controller
Servo/Axis · Intermediate · 30-60 minutes
Siemens 75021 - CLC: position offset at upper limit
The position offset generated by the overlaid motion has reached the limit set in MD $MC_CLC_SENSOR_UPPER_LIMIT or programmed with CLC_LIM(.,.). Depending on the setting in bit 1 of MD $MC_CLC_SPECIAL_FEATURE_MASK the following cancel criterion is active: Bit 1 = 0: Cancel key Bit 1 = 1: Reset Control reaction: NC Start disable in this channel. Alarm display. NC Stop on alarm.
75021
Siemens 75021 - CLC: position offset at upper limit
CLC: position offset at upper limit
The position offset generated by the overlaid motion has reached the limit set in MD $MC_CLC_SENSOR_UPPER_LIMIT or programmed with CLC_LIM(.,.). Depending on the setting in bit 1 of MD $MC_CLC_SPECIAL_FEATURE_MASK the following cancel criterion is active: Bit 1 = 0: Cancel key Bit 1 = 1: Reset Control reaction: NC Start disable in this channel. Alarm display. NC Stop on alarm.
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Common Causes
- The position offset generated by the overlaid motion has reached the limit set in MD $MC_CLC_SENSOR_UPPER_LIMIT or programmed with CLC_LIM(...,...).
- Depending on the setting in bit 1 of MD $MC_CLC_SPECIAL_FEATURE_MASK the following cancel criterion is active: Bit 1 = 0: Cancel key Bit 1 = 1: Reset
Troubleshooting Steps
- 1Check position and form of the workpiece.
- 2If necessary, program further limits.
- 3Clear alarm with the Delete key or NC START
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