What causes Siemens SINUMERIK alarm 15166?

User-defined ASUP file _N_ASUP_SPF not created or placed in incorrect directory path. Machine data 11610 $MN_ASUP_EDITABLE enabled but corresponding SPF program missing from both search paths. File naming convention incorrect - must be exactly _N_ASUP_SPF without additional extensions or characters. Directory permissions preventing access to /_N_CUS_DIR or /_N_CMA_DIR search paths. User program file corrupted or incomplete upload to the CNC control.

How do I fix Siemens SINUMERIK alarm 15166?

1. Verify machine data 11610 $MN_ASUP_EDITABLE setting - confirm if user-defined ASUP is actually required; consider disabling if not needed to revert to default system ASUP 2. Check both search paths on the control: /_N_CUS_DIR/_N_ASUP_SPF and /_N_CMA_DIR/_N_ASUP_SPF using file manager or HMI directory browser to confirm file existence and exact naming 3. If file missing, create or transfer the _N_ASUP_SPF program to the correct directory using DNC or SINUMERIK Operate file transfer; verify file is complete and not truncated 4. Inspect file permissions on the control filesystem - ensure user account has read/execute access to both search directories and the SPF file itself 5. Disable and re-enable machine data 11610 to force the control to re-scan for the user program, or perform a controlled restart if the file was just added

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 15166

Siemens 840D 15166 - Channel user system asup _N_ASUP_SPF not available

By means of the machine data 11610 $MN_ASUP_EDITABLE the function "User-defined system asup" has been activated. However, the relevant user program could not be found in the specified search path: - 1. /_N_CUS_DIR/_N_ASUP_SPF - 2. /_N_CMA_DIR/_N_ASUP_SPF The default system asups are used.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

15166

Siemens 840D 15166 - Channel user system asup _N_ASUP_SPF not available

Channel user system asup _N_ASUP_SPF not available

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

User-defined ASUP file _N_ASUP_SPF not created or placed in incorrect directory path
Machine data 11610 $MN_ASUP_EDITABLE enabled but corresponding SPF program missing from both search paths
File naming convention incorrect - must be exactly _N_ASUP_SPF without additional extensions or characters
Directory permissions preventing access to /_N_CUS_DIR or /_N_CMA_DIR search paths
User program file corrupted or incomplete upload to the CNC control

Troubleshooting Steps

1Verify machine data 11610 $MN_ASUP_EDITABLE setting - confirm if user-defined ASUP is actually required; consider disabling if not needed to revert to default system ASUP
2Check both search paths on the control: /_N_CUS_DIR/_N_ASUP_SPF and /_N_CMA_DIR/_N_ASUP_SPF using file manager or HMI directory browser to confirm file existence and exact naming
3If file missing, create or transfer the _N_ASUP_SPF program to the correct directory using DNC or SINUMERIK Operate file transfer; verify file is complete and not truncated
4Inspect file permissions on the control filesystem - ensure user account has read/execute access to both search directories and the SPF file itself
5Disable and re-enable machine data 11610 to force the control to re-scan for the user program, or perform a controlled restart if the file was just added

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