How do I fix Siemens SINUMERIK alarm 14016?

1. An M or T function replacement is only possible if a subprogram call or return jump has not already been performed as a result of other program constructs. 2. The part program must be corrected accordingly. 3. Clear alarm with NC START or RESET key and continue the program

Siemens SINUMERIK codes

axismd.ai

Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-60 minutes

Alarm 14016

Siemens 14016 - Block error when calling the subroutine via M/T function

SINUMERIK alarm 14016 occurs when the CNC interpreter encounters an unrecognized G-code command due to post-processor incompatibility, missing software options, or modal state conflicts. The control halts execution to prevent undefined machine behavior when it cannot resolve the G-code within the active SINUMERIK variant's command set.

Siemens SINUMERIKProgram/G-codeIntermediate30-60 minutes

14016

Siemens 14016 - Block error when calling the subroutine via M/T function

Block error when calling the subroutine via M/T function

The following conflict was detected in a subprogram call per M or T function: In the block referenced by parameter: - An M or T function replacement has already been activated - A modal subprogram call is active - A subprogram return jump is programmed - An end of program is programmed - An M98 subprogram call is active (only in external language mode) - T function replacement by D function programming in the same part program line is not possible with active TLC (G43/G44) in ISO2 system Control reaction: Correction block is reorganized. Interface signals are set. Alarm display.

Root Cause Summary

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
Identify offending G-code block
Navigate to HMI > Diagnostics > Alarms and note the exact block number and G-code command that triggered alarm 14016.
Use the cursor position in the program editor to jump directly to the problematic line
2
Verify SINUMERIK variant compatibility
Check HMI > Commissioning > System data > General SD > $MN_SYSCLOCK_MODE and compare against post-processor settings to ensure G-code variant match.
Never modify system data without proper backup and authorization
3
Cross-reference G-code in programming manual
Consult the SINUMERIK Programming Manual for your specific software version to verify if the G-code exists and its proper syntax requirements.
4
Modify or replace incompatible G-code
Edit the part program to use equivalent SINUMERIK-compatible commands or contact CAM programmer to regenerate with correct post-processor.

DIY Feasiblehigh confidence

Call a technician if:

·Software option licensing required
·System file corruption detected
·Machine data modifications needed

Prevention

Verify post-processor matches exact SINUMERIK variant and software version
Maintain documentation of installed software options
Use program syntax check before running new parts
Standardize on proven G-code libraries

Common Mistakes

Using Fanuc or Haas G-codes without SINUMERIK conversion
Assuming all SINUMERIK variants support identical G-code sets
Not checking software options before programming advanced features
Mixing ISO and SINUMERIK-specific programming styles

Related Alarms

14017 14018 10930 12080

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.