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Siemens SINUMERIK Controller
Communication · Intermediate · 30-60 minutes
Siemens 28011 - IPO time insufficient for NCU link. Link cycle time:
Error message of the NCU link module. All messages must be transmitted within one interpolator cycle. This applies particularly to message retries. The time was not sufficient! The parameter indicates how many microseconds the NCU link module needs in order to send the message Control reaction: NC not ready. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm.
28011
Siemens 28011 - IPO time insufficient for NCU link. Link cycle time:
IPO time insufficient for NCU link. Link cycle time
Error message of the NCU link module. All messages must be transmitted within one interpolator cycle. This applies particularly to message retries. The time was not sufficient! The parameter indicates how many microseconds the NCU link module needs in order to send the message Control reaction: NC not ready. Channel not ready. NC Start disable in this channel. Interface signals are set. 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
- Error message of the NCU link module.
- All messages must be transmitted within one interpolator cycle.
- This applies particularly to message retries.
Troubleshooting Steps
- 1Increase the interpolator cycle time, i.e. modify one of the following MDs on all NCUs.
- 2IPO_SYSCLOCK_TIME_RATIO SYSCLOCK_CYCLE_TIME
- 3Switch control OFF - ON
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