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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 129939 - Workpiece ( ) is currently being machined.
This alarm occurs when a workpiece or DAT file is currently being machined or is disabled. To fix, ensure the file or workpiece is closed in MCSE before proceeding.
129939
Siemens 129939 - Workpiece ( ) is currently being machined.
Workpiece is currently being machined.
The DAT file or workpiece is currently disabled
Root Cause Summary
This alarm occurs when a workpiece or DAT file is currently being machined or is disabled. To fix, ensure the file or workpiece is closed in MCSE before proceeding.
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.
Causes and Fixes
- 1
SAFETY FIRST - Verify machine state
ENSURE MACHINE IS IN SAFE STATE: Verify spindle is stopped, all axes are stationary, and machine is not in automatic mode before proceeding with any file operations.
- 2
Check MCSE status
Open MCSE and verify if the workpiece or DAT file is currently active or open.
- 3
Close the file safely
Close the open DAT file or workpiece in MCSE to release the lock. Do not force-close if machining operations are active.
- 4
Reset and retry
Clear the alarm using proper alarm reset procedures and attempt to run the program again.
Call a technician if:
- ·If the alarm persists after closing files and verifying workpiece status
- ·If access or configuration issues cannot be resolved by the operator
- ·If you are unsure about any safety implications of the required changes
- ·If machine behavior seems abnormal during troubleshooting
Prevention
- Ensure all files are closed in MCSE before running programs
- Regularly check workpiece status and permissions
Common Mistakes
- Forgetting to close files in MCSE
- Overlooking workpiece disable settings
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Always verify with your machine manual or a certified technician before performing service procedures.