What causes Siemens SINUMERIK alarm 20200?

Part program contains an illegal or unsupported command for the current machine configuration. Channel or axis configuration does not support the programmed function. Required machine option not enabled for the commanded function. Axis assignment or transformation configuration error. Program execution sequence error.

How do I fix Siemens SINUMERIK alarm 20200?

1. Identify the program block that triggered the alarm — note the channel and block number. 2. Review the commanded function against the SINUMERIK programming manual. 3. Check if the required machine option is enabled for this function. 4. Verify axis assignments and transformation settings are correct for the application. 5. Consult the Siemens SINUMERIK alarm manual for alarm 20200 specific remedy.

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Siemens SINUMERIK Controller

Spindle · Intermediate · 30-120 minutes

Alarm 20200

Siemens 840D 20200 - Channel invalid spindle number with tool fine compensation

SINUMERIK 20200 fires when a PUTFTOC (Put Fine Tool Offset Compensation) command references a spindle number that has no valid assignment to an axis/spindle in the target channel's NCK configuration. This is a spindle mapping validation error at the NCK level, typically occurring during tool compensation table writes to an undefined spindle resource.

Siemens SINUMERIKSpindleIntermediate30-120 minutes

20200

Siemens 840D 20200 - Channel invalid spindle number with tool fine compensation

Channel invalid spindle number with tool fine compensation

Root Cause Summary

SINUMERIK 20200 fires when a PUTFTOC (Put Fine Tool Offset Compensation) command references a spindle number that has no valid assignment to an axis/spindle in the target channel's NCK configuration. This is a spindle mapping validation error at the NCK level, typically occurring during tool compensation table writes to an undefined spindle resource.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access Siemens HMI > Diagnosis > Alarms, confirm spindle number %2 from alarm message.
2
Navigate to Siemens HMI > Machine Data > Channel > Spindle Parameters. Verify MD10070 (SpindleNo) lists the referenced spindle number for this channel.
Spindle assignment mismatch between NC program and machine data will prevent tool compensation.
3
Confirm MD10072 (DriveNo) correctly maps the spindle to a valid drive axis. Cross-reference with axis configuration in Siemens HMI > Machine Data > Axes.
4
If spindle assignment is missing, add spindle number to MD10070 and assign appropriate drive via MD10072, then save and perform warm restart (Siemens HMI > Machine > Restart > Warm).

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