What causes Siemens SINUMERIK alarm 15171?

SPF source file was modified after the compiled program (DCC/CCI file) was created, causing a timestamp mismatch. Compiled program files were not regenerated after updates to source subroutine files. Manual editing or version control operations updated SPF file timestamps without recompiling. Memory card or backup restoration placed older compiled files alongside newer source files. Program editor or offline programming software created newer SPF versions without triggering recompilation.

How do I fix Siemens SINUMERIK alarm 15171?

1. Verify the modification timestamps of both the SPF source file and corresponding DCC/CCI compiled file using the file system or control panel diagnostics 2. Delete all compiled program files (DCC/CCI) associated with the affected subroutine to force recompilation on next execution 3. Recompile the affected subroutine by running a full program compilation cycle through the control's program management interface 4. Check that all dependent subroutine files have been updated and recompiled in the correct order to maintain consistency 5. Verify file integrity by comparing SPF and compiled file dates across the entire program directory and regenerate any mismatched pairs

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 15171

Siemens 840D 15171 - Channel block compiled program older than the relevant

When calling a precompiled subroutine, it was noticed that the compiled program is older than the relevant SPF file. The compiled program was deleted and during start the subroutine is executed instead of the compiled program.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

15171

Siemens 840D 15171 - Channel block compiled program older than the relevant

Channel block compiled program older than the relevant

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

SPF source file was modified after the compiled program (DCC/CCI file) was created, causing a timestamp mismatch
Compiled program files were not regenerated after updates to source subroutine files
Manual editing or version control operations updated SPF file timestamps without recompiling
Memory card or backup restoration placed older compiled files alongside newer source files
Program editor or offline programming software created newer SPF versions without triggering recompilation

Troubleshooting Steps

1Verify the modification timestamps of both the SPF source file and corresponding DCC/CCI compiled file using the file system or control panel diagnostics
2Delete all compiled program files (DCC/CCI) associated with the affected subroutine to force recompilation on next execution
3Recompile the affected subroutine by running a full program compilation cycle through the control's program management interface
4Check that all dependent subroutine files have been updated and recompiled in the correct order to maintain consistency
5Verify file integrity by comparing SPF and compiled file dates across the entire program directory and regenerate any mismatched pairs

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