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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 20-45 minutes
Siemens 14400 - Block tool radius compensation active at transformation switchover
SIEMENS alarm 14400 M Code Error occurs when the SINUMERIK control encounters an undefined, incorrectly programmed, or unsupported M-function in the NC program. This alarm is triggered during program preprocessing or execution when the control cannot properly interpret or execute the M-code instruction.
14400
Siemens 14400 - Block tool radius compensation active at transformation switchover
Block tool radius compensation active at transformation switchover
A change of transformation is not allowed when tool radius compensation is active Control reaction: Correction block is reorganized. Interface signals are set. Alarm display.
Root Cause Summary
SIEMENS alarm 14400 M Code Error occurs when the SINUMERIK control encounters an undefined, incorrectly programmed, or unsupported M-function in the NC program. This alarm is triggered during program preprocessing or execution when the control cannot properly interpret or execute the M-code instruction.
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Causes and Fixes
- 1
Check M-Code Definition
Navigate to HMI > Commissioning > Machine Data and verify MD22010 $MC_MFCT_FUNCTION_MASK to see which M-codes are enabled for your system.
Use the search function in machine data to quickly locate M-function related parameters
- 2
Verify M-Code Range
Check MD22000 $MC_MFCT_MAX_NR to confirm the maximum M-code number supported by your configuration.
Modifying machine data requires proper authorization and may affect machine safety functions
- 3
Configure Missing M-Code
If the M-code should be supported, configure it in the appropriate MD22xxx parameters or contact your machine builder for the correct M-function definition.
Call a technician if:
- ·Machine data modifications required
- ·PLC program changes needed
- ·Hardware interface issues suspected
Prevention
- Validate all M-codes against machine documentation before programming
- Use consistent M-code programming standards
- Regularly backup and document machine data M-function configurations
Common Mistakes
- Programming undefined M-codes without checking machine capabilities
- Using multiple modal M-codes from same group simultaneously
- Ignoring PLC acknowledgment requirements for custom M-codes
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