Troubleshooting steps
high
SINUMERIK 840D sl
25101 – Spindle drive communication fault
Spindle drive communication error
Details
alarm
Error typeSpindle fault
MeaningSpindle drive fault motor fault encoder fault mechanical problem
Typical causesCheck spindle drive verify motor test encoder check mechanical condition
Solutionshigh
Severity25100
Catalog references
System Information
SINUMERIK 840D sl25101
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 causes 25101?
Alarm 25101 indicates spindle drive communication fault. Check spindle diagnostics.
Community
Discussion & Experiences
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