Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-120 minutes

Alarm 401007

Siemens 840D 401007 - FC 10 system error 0x8087

This alarm indicates a system error in Function Block FC10, typically caused by programming errors, invalid parameters, or system configuration issues. Always ensure machine is in a safe state before making program changes.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

401007

Siemens 840D 401007 - FC 10 system error 0x8087

FC 10 system error 0x8087

Siemens SINAMICS drive alarm 401007: FC 10 system error 0x8087. This alarm indicates a fault condition in the SINAMICS servo drive system. Refer to the Siemens SINAMICS fault list documentation for the complete remedy.

Root Cause Summary

This alarm indicates a system error in Function Block FC10, typically caused by programming errors, invalid parameters, or system configuration issues. Always ensure machine is in a safe state before making program changes.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Ensure machine safety

    Put machine in safe state, engage emergency stop if needed, and ensure all axes are stopped before proceeding.

  2. 2

    Locate error in FC10

    Access the PLC program, navigate to Function Block FC10, and check for syntax errors, invalid parameters, or logic issues.

  3. 3

    Correct programming error

    Fix identified syntax errors, correct parameter values, or resolve logic issues in FC10.

  4. 4

    Test safely

    Clear alarm, perform dry run or simulation first, then test at reduced speed before normal operation.

Service Recommendedmedium confidence

Call a technician if:

  • ·Always - this is a system-level error requiring qualified diagnosis
  • ·If unfamiliar with PLC programming
  • ·If hardware issues are suspected
  • ·Before making any program changes

Prevention

  • Only allow qualified personnel to modify PLC programs
  • Maintain backup copies of working programs
  • Perform regular system diagnostics
  • Follow proper change management procedures

Common Mistakes

  • Overlooking the specific line number in the alarm
  • Editing unrelated program sections

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Always verify with your machine manual or a certified technician before performing service procedures.