Siemens Sinumerik 840D sl Error Code 25051

Siemens Sinumerik CNC Critical NC Safety Alarm

Model: 840D sl | Code: 25051

Applicable Systems
SINUMERIK 840D SINUMERIK 840D sl SINUMERIK 840Di SINUMERIK ONE

Symptoms

Safety-integrated NC alarm. Alarm 25051 is displayed on the Sinumerik HMI.

Possible Causes

  • Safety function activated
  • Safe speed monitoring fault
  • Safe standstill monitoring fault
  • Safety configuration mismatch

Troubleshooting Steps

  1. Step 1: Read the alarm text on the HMI for alarm 25051
    Full alarm description displayed with cause details
  2. Step 2: Check the Siemens Sinumerik diagnostic manual for the specific alarm number
    Alarm cause and remedy described in the manual
  3. Step 3: Investigate the affected subsystem (NC, drive, PLC, or cycle) per the diagnostic procedure
    Root cause identified through systematic diagnosis
  4. Step 4: Correct the fault and acknowledge the alarm with the RESET key
    Alarm clears after fault correction and acknowledgment

How to Reset

Correct the fault and press RESET on the HMI to acknowledge and clear the alarm. Refer to the Sinumerik 840D sl Alarm List (A5E40869531) for detailed remedies.

Frequently Asked Questions

  • Q: What does Siemens Sinumerik alarm 25051 mean?

    This is a nc safety alarm from the Siemens Sinumerik 840D sl/828D CNC system. Safety-integrated NC alarm.

  • Q: How do I clear Siemens alarm 25051?

    Correct the underlying fault as described in the alarm message, then press the RESET key on the HMI to acknowledge and clear the alarm.

Related Siemens Sinumerik Fault Codes

Source: Siemens SINUMERIK 840D sl/828D Alarm List (A5E40869531), Siemens AG

Category: CNC