Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 16950

Siemens 840D 16950 - Channel search run with hold block

Informational alarm. The search run was not performed on the interruption block, instead, it touches down shortly before that. This so-called "hold block" is generated by the part program command IPTRLOCK, or implicitly defined by $MC_AUTO_IPTR_LOCK. This is to prevent you from performing a search r

Siemens SINUMERIKServo/AxisIntermediate20-45 minutes

16950

Siemens 840D 16950 - Channel search run with hold block

Channel search run with hold block

Informational alarm. The search run was not performed on the interruption block, instead, it touches down shortly before that. This so-called "hold block" is generated by the part program command IPTRLOCK, or implicitly defined by $MC_AUTO_IPTR_LOCK. This is to prevent you from performing a search r

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • IPTRLOCK command in part program preventing search run on interruption block
  • $MC_AUTO_IPTR_LOCK parameter automatically generating hold block
  • Search run initiated during active interpolation lock condition
  • Part program structure causing touchdown before intended interruption block

Troubleshooting Steps

  1. 1Review part program for IPTRLOCK commands and verify their necessity for the current operation
  2. 2Check machine parameter $MC_AUTO_IPTR_LOCK setting and adjust if automatic hold block generation is not required
  3. 3Verify search run positioning and confirm touchdown location is acceptable for your process
  4. 4If search run must occur on interruption block, remove or reposition IPTRLOCK command in part program
  5. 5Execute dry run to validate new search run behavior before resuming production 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.