Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

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

Alarm 4185

Siemens 840D 4185 - Channel illegal auxiliary function configured

Siemens SINUMERIK 840D system notice 4185: Channel illegal auxiliary function configured. This is a system-level notification regarding machine data or configuration. Note the message details and take the indicated action.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

4185

Siemens 840D 4185 - Channel illegal auxiliary function configured

Channel illegal auxiliary function configured

Siemens SINUMERIK 840D system notice 4185: Channel illegal auxiliary function configured. This is a system-level notification regarding machine data or configuration. Note the message details and take the indicated action.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Machine data was changed requiring acknowledgment or power cycle
  • System configuration change notification
  • Commissioning or service operation generated this notice
  • Axis or drive configuration change affecting machine data

Troubleshooting Steps

  1. 1Read the complete notice text on the SINUMERIK screen.
  2. 2If a power cycle is indicated, perform a controlled machine power off and restart.
  3. 3If machine data backup is indicated, save the current machine data.
  4. 4Acknowledge the notice and verify the system is operating correctly after the change.
  5. 5Consult the machine commissioning engineer if the notice is unexpected.

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