What causes Siemens SINUMERIK alarm 104101?

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 104101?

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 104101 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 104101

Siemens 840D 104101 - PA: Error on opening the window

Alarm 104101 indicates a programming error related to the WINA (window opening) command in the NC program. This typically occurs when attempting to open a working area limitation window with incorrect syntax, invalid parameters, or when window boundaries exceed machine travel limits or conflict with existing workspace limitations.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104101

Siemens 840D 104101 - PA: Error on opening the window

PA: Error on opening the window

Root Cause Summary

Alarm 104101 indicates a programming error related to the WINA (window opening) command in the NC program. This typically occurs when attempting to open a working area limitation window with incorrect syntax, invalid parameters, or when window boundaries exceed machine travel limits or conflict with existing workspace limitations.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Review the NC program line where WINA command is called and verify all axis coordinate values are within machine travel limits.
2
Check machine data MD1300 (AXCONF_CHANAX_NAME_TAB) and MD1320 (AXCONF_CHANAX_MIN/MAX_VELO) to confirm valid axis coordinate ranges for your machine configuration.
3
Ensure minimum window coordinates are smaller than maximum coordinates (e.g., X min < X max, Y min < Y max).
4
Correct the WINA parameter values in the NC program and reset the alarm with NC START or DELETE key.

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.