What causes Siemens SINUMERIK alarm 100142?

Part program contains an illegal or unsupported command for the current machine configuration. Parameter or machine data setting incompatible with the commanded operation. Required option or function not enabled on this SINUMERIK control. Incorrect axis assignment or configuration for the commanded function. Software version or compile cycle version mismatch.

How do I fix Siemens SINUMERIK alarm 100142?

1. Note the full alarm message including any parameter values shown (e.g., axis number, block number, channel). 2. Identify the program block or operation that triggered the alarm. 3. Review the SINUMERIK alarm manual for alarm 100142 to identify the specific cause and remedy. 4. Check the relevant machine data parameters referenced in the alarm. 5. If the alarm persists after correcting the program, contact Siemens technical support with the full alarm text and machine data backup.

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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-120 minutes

Alarm 100142

Siemens 840D 100142 - Error on opening the file!

SIEMENS alarm 100142 'Error on opening the file!' occurs when the SINUMERIK control cannot access or open a required file during servo system initialization or operation. This typically involves servo parameter files, configuration data, or drive-specific files that are corrupted, missing, or have incorrect access permissions.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

100142

Siemens 840D 100142 - Error on opening the file!

Error on opening the file!

Root Cause Summary

SIEMENS alarm 100142 'Error on opening the file!' occurs when the SINUMERIK control cannot access or open a required file during servo system initialization or operation. This typically involves servo parameter files, configuration data, or drive-specific files that are corrupted, missing, or have incorrect access permissions.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access servo parameter backup
Navigate to HMI → Commissioning → Drive → Servo → Parameter backup and check if backup files exist in /siemens/sinumerik/data/servo/ directory.
Always maintain multiple parameter backups with timestamps
2
Restore from backup
Use SINUMERIK Operate → Commissioning → Drive → Parameter → Load to restore the most recent valid servo parameter file.
Ensure machine is in safe position before parameter restoration
3
Verify servo parameters
Check critical servo parameters like MD36200 (SERVO_ENABLE) and MD36300 series (position control parameters) after restoration.
Compare restored parameters with machine documentation

DIY Feasiblehigh confidence

Call a technician if:

·CompactFlash replacement required
·Drive hardware failure suspected
·System-wide file corruption

Prevention

Regular parameter backups
Proper system shutdown procedures
CompactFlash health monitoring
User access management

Common Mistakes

Ignoring backup procedures
Modifying file permissions incorrectly
Not checking CompactFlash health
Attempting file operations without proper access rights

Related Alarms

100141 380001 300500 25050

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Always verify with your machine manual or a certified technician before performing service procedures.