Siemens SINUMERIK 840D Alarm 26002

Siemens Sinumerik CNC Info Spindle standstill fault

Model: SINUMERIK 840D/840D sl | Code: 26002

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

Symptoms

The spindle standstill monitoring has detected that the spindle is not at standstill.

Possible Causes

  • Drive-CLiQ communication cable loose or damaged
  • Drive module power supply fault
  • Drive module hardware damage
  • NCU motherboard fault
  • Parameter setting error
  • Mechanical overload or binding
  • Encoder feedback fault

Troubleshooting Steps

  1. Step 1: Record the alarm code and all displayed messages from the HMI
    Complete alarm information captured
  2. Step 2: Check the Drive-CLiQ cable connections between NCU and drive modules
    All cables are securely connected and undamaged
  3. Step 3: Verify the drive module power supply and LED status
    Drive module LEDs show normal (green) status
  4. Step 4: Use the diagnostic menu (DIAGNOSIS) to view NC and PLC alarms
    All active alarms are identified
  5. Step 5: Address the root cause identified in the diagnostics
    Root cause is resolved

How to Reset

To reset SINUMERIK 840D alarm 26002: 1) Fix the root cause identified in diagnostics. 2) Press the RESET key on the MCP (Machine Control Panel). 3) If alarm persists, power cycle the machine. 4) If hardware fault, replace the faulty component. Caution: Some alarms require specific reset sequences; consult the 840D diagnostics manual.

Frequently Asked Questions

  • Q: What does 26002 mean on Siemens Sinumerik SINUMERIK 840D/840D sl?

    The spindle standstill monitoring has detected that the spindle is not at standstill.

  • Q: How do I fix 26002 on Siemens Sinumerik?

    Follow the troubleshooting steps: Record the alarm code and all displayed messages from the HMI

Related Siemens Sinumerik Fault Codes

Source: Siemens SINUMERIK 840D Diagnostics Manual (blog.csdn.net)

Category: CNC