What causes Siemens SINUMERIK alarm 104226?

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 104226?

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 104226 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.

axismd.ai

Siemens SINUMERIK Controller

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

Alarm 104226

Siemens 840D 104226 - Error on reading notebook

Alarm 104226 indicates the control system cannot read data from the notebook (electronic handwheel or machine control panel memory). This typically occurs due to corrupted notebook files, communication errors between the NCU and the machine control panel (MCP), or hardware failures in the notebook interface electronics.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104226

Siemens 840D 104226 - Error on reading notebook

Error on reading notebook

Root Cause Summary

Alarm 104226 indicates the control system cannot read data from the notebook (electronic handwheel or machine control panel memory). This typically occurs due to corrupted notebook files, communication errors between the NCU and the machine control panel (MCP), or hardware failures in the notebook interface electronics.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access HMI commissioning mode and navigate to 'System Data' > 'Machine Data'. Check for file system errors or corrupt files related to notebook configuration.
2
Perform a backup of current system configuration if possible, then attempt to restore notebook settings from a known good backup archive.
Ensure you have a valid backup before attempting restoration to avoid complete configuration loss.
3
If no backup exists, delete the corrupted notebook file via Service > File Management and allow system to recreate default notebook configuration on next startup.
4
Reboot the control system completely (power cycle NCU) and verify notebook functionality by testing handwheel operations and display panel responses.

Service Recommended confidence

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

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