Troubleshooting steps
high
SINUMERIK 840D sl
28020 – Spindle speed deviation too high
Spindle speed deviation exceeds allowable limit
Details
alarm
Error typeSpindle speed
MeaningMechanical problem drive fault load issue
Typical causesCheck mechanical condition verify drive reduce load check spindle
Solutionshigh
Severity25100 25110
Catalog references
System Information
SINUMERIK 840D sl28020
Utilities
Troubleshooting Steps
Other alarms
Other SINUMERIK 840D sl Alarms
22050 – Channel not ready
NC channel failed to initialize or is in error state
22051 – Channel initialization error
Channel failed to initialize during startup
22052 – Channel mode error
Channel mode conflict or invalid mode
25000 – Emergency stop active
Emergency stop button pressed or safety circuit activated
25050 – Axis hardware fault
Axis drive or motor detected a hardware fault condition
FAQ
Common questions
What deviation?
Check commanded vs actual speed. Deviation limit in parameters.
Community
Discussion & Experiences
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