Troubleshooting steps
high
SINUMERIK 840D sl
25021 – Axis drive communication fault
Axis drive communication error
Details
alarm
Error typeDrive communication
MeaningCommunication cable fault drive fault
Typical causesCheck drive communication cable verify connections restart drive
Solutionshigh
Severity25051 30001
Catalog references
System Information
SINUMERIK 840D sl25021
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
Which cable?
Check DRIVE-CLiQ or encoder cable.
Community
Discussion & Experiences
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