What causes Siemens SINUMERIK alarm 104206?

Required machine data or parameter not configured for the requested function. Option bit not set in SINUMERIK to enable the required functionality. Program references a function or axis that has not been configured. Machine commissioning incomplete — required setup step was not performed. Configuration data cleared or lost due to a parameter reset or hardware change.

How do I fix Siemens SINUMERIK alarm 104206?

1. Read the full alarm message to identify what is missing (axis name, parameter number, function name). 2. Consult the SINUMERIK alarm manual for alarm 104206 for the specific configuration requirement. 3. Check the relevant machine data group and set the required parameter. 4. If a specific option is required, verify it is licensed and enabled in the SINUMERIK option settings. 5. Power cycle after making configuration changes to apply the new settings.

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Siemens SINUMERIK Controller

Tool Changer · Intermediate · 30-120 minutes

Alarm 104206

Siemens 840D 104206 - No magazine available

Alarm 104206 occurs when the CNC program attempts to access a tool magazine that is either not physically present, not properly configured in the machine data, or not enabled in the current channel configuration. This is typically a configuration issue where the tool management system cannot locate a valid magazine definition for the requested tool change operation.

Siemens SINUMERIKTool ChangerIntermediate30-120 minutes

104206

Siemens 840D 104206 - No magazine available

No magazine available

Root Cause Summary

Alarm 104206 occurs when the CNC program attempts to access a tool magazine that is either not physically present, not properly configured in the machine data, or not enabled in the current channel configuration. This is typically a configuration issue where the tool management system cannot locate a valid magazine definition for the requested tool change operation.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access machine data and check MD18100 $MN_MM_NUM_MAGAZINE to verify the number of magazines configured is greater than 0.
2
Verify MD18110 $MN_MM_TYPE_OF_MAGAZINE[n] is set correctly for each magazine (0=chain magazine, 1=slot magazine, etc.).
Note the magazine index [n] - indexing starts at 0.
3
Check MD18120 $MN_MM_NUM_LOCATION[n] to ensure the number of tool locations per magazine is defined and matches physical magazine.
4
Power cycle the control after verifying all magazine machine data parameters, then test with a simple tool change command.
Ensure no workpiece is in the machine during testing.

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