What causes Siemens SINUMERIK alarm 100303?

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 100303?

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 100303 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 100303

Siemens 840D 100303 - Paging not possible

SIEMENS alarm 100303 occurs when attempting to navigate through HMI pages for axes, drives, or channels that exceed the configured system limits. This typically happens when using the paging functions in commissioning or diagnostic screens where the system tries to access non-existent hardware configurations.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

100303

Siemens 840D 100303 - Paging not possible

Paging not possible

Root Cause Summary

SIEMENS alarm 100303 occurs when attempting to navigate through HMI pages for axes, drives, or channels that exceed the configured system limits. This typically happens when using the paging functions in commissioning or diagnostic screens where the system tries to access non-existent hardware configurations.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Check Axis Configuration
Navigate to HMI → Commissioning → Axis → Machine Data and verify MD30100 (Number of axes) matches your actual hardware setup.
Compare MD30100 with the physical axis count on your machine
2
Verify Drive Configuration
Check MD36000 (Drive type) for each configured axis and ensure all required drives are properly defined in the machine data.
Incorrect drive configuration can cause servo faults
3
Validate Channel Settings
Review MD20070 (Number of channels) in HMI → Commissioning → Channel → General to ensure it matches your NC program requirements.
4
Reset and Recompile
After corrections, perform a complete reset via HMI → Commissioning → System → Reset → Complete reset to rebuild the configuration.

DIY Feasiblehigh confidence

Call a technician if:

·Software update required
·Hardware configuration changes needed
·Persistent alarm after all troubleshooting steps

Prevention

Always complete full commissioning wizard during initial setup
Regularly backup machine data before configuration changes
Keep HMI and NCK software versions synchronized

Common Mistakes

Attempting to access non-configured axes through HMI navigation
Incomplete commissioning leaving undefined parameters
Mixing different software versions without compatibility check

Related Alarms

100300 100301 100302 380001 380002

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