What causes Siemens SINUMERIK alarm 107068?

Normal system operation generated this status message. User action or program command triggered this notification. Machine data or parameter change created this notification. System startup or initialization process generating a status report.

How do I fix Siemens SINUMERIK alarm 107068?

1. Read the full message text displayed on the SINUMERIK screen for complete details. 2. If action is required, follow the instructions shown in the message. 3. Consult the SINUMERIK alarm manual for alarm 107068 for detailed information about this message. 4. If the message appears unexpectedly, check recent parameter changes or program modifications. 5. For recurring messages, contact Siemens technical support or the machine builder.

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-120 minutes

Alarm 107068

Siemens 840D 107068 - MCU: Subroutine call allowed only with quantity !

This alarm occurs when a subroutine call in a Siemens CNC program lacks a specified quantity or repetition parameter. Correct the syntax by adding the required quantity value.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

107068

Siemens 840D 107068 - MCU: Subroutine call allowed only with quantity !

MCU: Subroutine call allowed only with quantity !

Siemens SINUMERIK operator message 107068: MCU: Subroutine call allowed only with quantity!. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.

Root Cause Summary

This alarm occurs when a subroutine call in a Siemens CNC program lacks a specified quantity or repetition parameter. Correct the syntax by adding the required quantity value.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Locate the error
Check the alarm message for the line number and find the subroutine call in the program.
2
Add quantity parameter
Ensure the subroutine call includes a quantity (e.g., L1 for one repetition).
3
Test the program
Clear the alarm and run the program to verify the fix.

DIY Feasiblehigh confidence

Call a technician if:

·If the alarm persists despite correct syntax
·If documentation for subroutine calls is unclear

Prevention

Always specify quantity in subroutine calls
Validate programs using simulation before execution
Verify tool paths and safety zones before running modified programs
Keep backup copies of working programs before making changes

Common Mistakes

Omitting L or P parameters in subroutine calls
Misreading alarm line number and editing wrong block

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

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