Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 61328

Siemens 840D 61328 - Channel Block: Check D number

D number in parameter _KNUM is 0. The alarm can be triggered by all measuring cycles. Remedy: Check parameter _KNUM.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

61328

Siemens 840D 61328 - Channel Block: Check D number

Channel Block: Check D number

D number in parameter _KNUM is 0. The alarm can be triggered by all measuring cycles. Remedy: Check parameter _KNUM.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Parameter _KNUM not configured or set to zero value
  • Measuring cycle called without proper D number assignment
  • Parameter _KNUM lost due to PLC backup/restore operation
  • Incorrect probing cycle syntax or missing D offset reference
  • Machine startup with uninitialized probing parameters

Troubleshooting Steps

  1. 1Verify parameter _KNUM value in active channel using machine diagnostics - confirm it is set to a valid non-zero D number
  2. 2Check the probing cycle call syntax in part program to ensure D number is properly referenced before cycle execution
  3. 3Access machine parameter settings and assign appropriate D offset number to _KNUM matching your probe configuration
  4. 4If recently restored from backup, re-enter _KNUM values manually as PLC restore may not preserve probe parameters
  5. 5Test with simple G65 probing cycle using explicit D number reference to isolate if issue is parameter-dependent or cycle-dependent

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