What causes Siemens SINUMERIK alarm 4180?

M function number configured in $MN_EXTERN_M_NO_SET_INT or $MN_EXTERN_M_NO_DISABLE_INT exceeds valid range (typically M0-M99). Typo or data entry error when assigning M function number in machine data parameters. M function number conflicts with another defined M function in the machine configuration. Incomplete or corrupted machine data file causing parameter validation to fail. Invalid character or formatting in the M function number parameter value.

How do I fix Siemens SINUMERIK alarm 4180?

1. Access machine data editor and locate parameters $MN_EXTERN_M_NO_SET_INT and $MN_EXTERN_M_NO_DISABLE_INT to verify configured M function numbers are within valid range 2. Compare current M function assignments against machine documentation to confirm no conflicts exist with standard M functions (M3, M4, M5, M8, M9, M30, etc.) 3. Clear the alarm, correct the invalid M function number to a valid unassigned value, and verify machine data is saved and activated 4. Perform a machine data consistency check using diagnostics or machine data validation tools to identify any additional parameter conflicts 5. Restart the CNC controller and test ASUP interrupt activation with the corrected M function number to confirm proper operation

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 4180

Siemens 840D 4180 - Invalid M function number assigned to enable ASUP

An invalid M function number has been assigned for activation of ASUP. An illegal M number has been assigned in machine data $MN_EXTERN_M_NO_SET_INT or $MN_EXTERN_M_NO_DISABLE_INT for the configuration of the M number range for activation/deactivation of the interrupt program.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

4180

Siemens 840D 4180 - Invalid M function number assigned to enable ASUP

Invalid M function number assigned to enable ASUP

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

M function number configured in $MN_EXTERN_M_NO_SET_INT or $MN_EXTERN_M_NO_DISABLE_INT exceeds valid range (typically M0-M99)
Typo or data entry error when assigning M function number in machine data parameters
M function number conflicts with another defined M function in the machine configuration
Incomplete or corrupted machine data file causing parameter validation to fail
Invalid character or formatting in the M function number parameter value

Troubleshooting Steps

1Access machine data editor and locate parameters $MN_EXTERN_M_NO_SET_INT and $MN_EXTERN_M_NO_DISABLE_INT to verify configured M function numbers are within valid range
2Compare current M function assignments against machine documentation to confirm no conflicts exist with standard M functions (M3, M4, M5, M8, M9, M30, etc.)
3Clear the alarm, correct the invalid M function number to a valid unassigned value, and verify machine data is saved and activated
4Perform a machine data consistency check using diagnostics or machine data validation tools to identify any additional parameter conflicts
5Restart the CNC controller and test ASUP interrupt activation with the corrected M function number to confirm proper operation

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