Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 61407

Siemens 840D 61407 - Channel block: check 7th digit and higher of _KNUM

The 6th position of _KNUM includes invalid values. Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check the number of additive offset and setup offset. Check parameter _KNUM.

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

61407

Siemens 840D 61407 - Channel block: check 7th digit and higher of _KNUM

Channel block: check 7th digit and higher of _KNUM

The 6th position of _KNUM includes invalid values. Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check the number of additive offset and setup offset. Check parameter _KNUM.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Incorrect number of additive offsets configured in _KNUM parameter
  • Setup offset count exceeds maximum allowed value in 6th position
  • Manual entry error when setting _KNUM offset parameters
  • Tool offset table corruption or incomplete initialization
  • Mismatch between actual offset memory allocation and _KNUM configuration

Troubleshooting Steps

  1. 1Verify the 6th digit and higher positions of the _KNUM parameter match the actual number of additive and setup offsets available in the system
  2. 2Count the total configured additive offsets and setup offsets, then cross-reference against _KNUM specification
  3. 3Review the measuring cycle being executed when alarm triggered and confirm it matches configured offset structure
  4. 4Check machine parameter documentation for maximum allowed offset values and ensure _KNUM does not exceed limits
  5. 5If values are incorrect, modify _KNUM parameter to reflect actual offset configuration, then clear alarm and retry measuring cycle

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.