axismd.ai
Siemens SINUMERIK Controller
Servo/Axis · Basic · 10-20 minutes
Siemens 840D 14150 - Channel block illegal tool carrier number programmed or
A toolholder number was programmed which is negative or greater than the machine data MC_MM_NUM_TOOL_CARRIER.
14150
Siemens 840D 14150 - Channel block illegal tool carrier number programmed or
Channel block illegal tool carrier number programmed or
A toolholder number was programmed which is negative or greater than the machine data MC_MM_NUM_TOOL_CARRIER.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Common Causes
- Tool carrier number in part program exceeds maximum value defined in machine data MC_MM_NUM_TOOL_CARRIER
- Negative tool carrier number programmed in NC code (tool numbers must be positive integers)
- Machine data MC_MM_NUM_TOOL_CARRIER not properly configured for actual tool changer capacity
- Tool offset table references invalid tool carrier positions outside configured range
- Incorrect tool selection syntax in G-code block causing out-of-range interpretation
Troubleshooting Steps
- 1Review the part program at the indicated block number to identify the tool carrier number being called
- 2Check machine data parameter MC_MM_NUM_TOOL_CARRIER in the control to verify it matches actual tool changer capacity
- 3Verify tool carrier numbers in the program are positive integers and fall within 1 to MC_MM_NUM_TOOL_CARRIER range
- 4Correct the programmed tool carrier number or adjust MC_MM_NUM_TOOL_CARRIER machine data if the changer capacity was increased
- 5Clear the alarm and perform a trial run with corrected program to confirm resolution
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 freeWas this guide helpful?
Always verify with your machine manual or a certified technician before performing service procedures.