Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 27140

Siemens 840D 27140 - Waiting for motor module of at least one axis.

Alarm 27140 occurs during NCK ramp-up when the Safety Integrated (SI) motor module communication has not yet been established for at least one axis. This is a startup synchronization alarm indicating that safety functions are unavailable until all configured motor modules complete their initialization handshake with the NCK.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

27140

Siemens 840D 27140 - Waiting for motor module of at least one axis.

Waiting for motor module of at least one axis.

Siemens SINUMERIK alarm 27140: Waiting for motor module of at least one axis. This alarm indicates a fault or error condition on the SINUMERIK 840D control. Refer to the Siemens SINUMERIK alarm documentation for the complete description and remedy.

Root Cause Summary

Alarm 27140 occurs during NCK ramp-up when the Safety Integrated (SI) motor module communication has not yet been established for at least one axis. This is a startup synchronization alarm indicating that safety functions are unavailable until all configured motor modules complete their initialization handshake with the NCK.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Check DRIVE-CLiQ connector integrity on the motor module backplane. Verify physical connection at the servo drive or integrated spindle module connector is fully seated.

    Do not reconnect DRIVE-CLiQ while the system is powered; power down the machine first.

  2. 2

    Navigate to Diagnostics > Module Status in HMI or use SINUMERIK NCK menu to confirm motor module appears in the drive list with 'Ready' status, not 'Not Initialized' or 'Error'.

  3. 3

    Verify motor module firmware version matches the control unit firmware via MD $MN_MOTMOD_FW_VERSION. Mismatched versions prevent SI protocol handshake.

  4. 4

    If motor module shows error state, perform a cold restart of the servo drive by cycling main power to the machine for 10+ seconds and allow full ramp-up cycle.

Service Recommended confidence

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

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