What causes Siemens SINUMERIK alarm 4170?

Machine data was changed requiring acknowledgment or power cycle. System configuration change notification. Commissioning or service operation generated this notice. Axis or drive configuration change affecting machine data.

How do I fix Siemens SINUMERIK alarm 4170?

1. Read the complete notice text on the SINUMERIK screen. 2. If a power cycle is indicated, perform a controlled machine power off and restart. 3. If machine data backup is indicated, save the current machine data. 4. Acknowledge the notice and verify the system is operating correctly after the change. 5. Consult the machine commissioning engineer if the notice is unexpected.

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Siemens SINUMERIK Controller

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

Alarm 4170

Siemens 840D 4170 - Invalid M function number for channel synchronisation assigned

This alarm occurs when an invalid M function number (outside the range 0-99) is assigned for channel synchronization in ISO2/3 mode, or if the max value is less than the min value in machine data. Correct the machine data settings or program to resolve.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

4170

Siemens 840D 4170 - Invalid M function number for channel synchronisation assigned

Invalid M function number for channel synchronisation assigned

Root Cause Summary

This alarm occurs when an invalid M function number (outside the range 0-99) is assigned for channel synchronization in ISO2/3 mode, or if the max value is less than the min value in machine data. Correct the machine data settings or program to resolve.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Check machine data
Access machine data parameters $MN_EXTERN_CHAN_SYNC_M_NR_MIN and $MN_EXTERN_CHAN_SYNC_M_NR_MAX.
2
Correct values
Ensure values are between 0 and 99, and MAX is greater than or equal to MIN.
3
Restart system
Save changes, clear the alarm, and restart the control.

DIY Feasiblehigh confidence

Call a technician if:

·If machine data cannot be accessed or modified
·If the alarm persists after correcting values

Prevention

Validate M codes against machine data before running
Use simulation to catch syntax errors early
Ensure only authorized personnel modify machine data parameters
Document any machine data changes for traceability

Common Mistakes

Setting MAX value lower than MIN in machine data
Overlooking M code range restrictions in ISO mode

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Always verify with your machine manual or a certified technician before performing service procedures.