What causes Siemens SINUMERIK alarm 104247?

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 104247?

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 104247 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 104247

Siemens 840D 104247 - Error on writing user tool data

Alarm 104247 occurs when the control system cannot write tool data to the user tool memory area. This is typically caused by write protection on the tool data area, insufficient memory space, or attempting to write invalid tool data values that exceed permissible ranges or data structure limitations.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104247

Siemens 840D 104247 - Error on writing user tool data

Error on writing user tool data

Root Cause Summary

Alarm 104247 occurs when the control system cannot write tool data to the user tool memory area. This is typically caused by write protection on the tool data area, insufficient memory space, or attempting to write invalid tool data values that exceed permissible ranges or data structure limitations.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Check setting data SD42700 $SN_TOOLDATA_LOCK in the control - navigate to Commissioning > Setting Data > General SD and verify bit is set to 0 (unlocked).
2
Verify machine data MD18360 $MN_MM_WRITE_TOOL_DATA_MODE allows writing during program execution if attempting changes from NC program.
3
Check protection level - ensure current user authorization level (password level 1-7) permits tool data modifications in MD7310 $MM_ACCESS_LEVEL_WRITE_TOOLDATA.
Changing protection levels affects machine safety and data integrity - document current settings before modifications.
4
After adjusting write protection settings, perform a control RESET and retry the tool data write operation.

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