What causes Siemens SINUMERIK alarm 104122?

Parameter configuration error in the machine data for the affected axis or channel. Hardware fault on the axis drive or control module. Incorrect axis assignment or configuration in the SINUMERIK machine data. Software or firmware version incompatibility. Communication fault between NC and drive system.

How do I fix Siemens SINUMERIK alarm 104122?

1. Check the SINUMERIK alarm list for any sub-alarms or related alarms active at the same time. 2. Review the machine data parameters referenced in the alarm description for the affected axis. 3. Power cycle the machine to reset transient faults. 4. Check the SINAMICS drive diagnostics for the affected axis. 5. Consult the Siemens SINUMERIK alarm manual for alarm 104122 for detailed remedy instructions.

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Siemens SINUMERIK Controller

Spindle · Intermediate · 30-120 minutes

Alarm 104122

Siemens 840D 104122 - PA: Error on reading spindle status

Alarm 104122 indicates the NCK cannot read the spindle status feedback from the drive system, typically due to communication failure between the CNC control and spindle drive via DRIVE-CLiQ or analog feedback channels. This prevents the control system from monitoring spindle speed, position, and operational state, blocking spindle enable commands.

Siemens SINUMERIKSpindleIntermediate30-120 minutes

104122

Siemens 840D 104122 - PA: Error on reading spindle status

PA: Error on reading spindle status

Root Cause Summary

Alarm 104122 indicates the NCK cannot read the spindle status feedback from the drive system, typically due to communication failure between the CNC control and spindle drive via DRIVE-CLiQ or analog feedback channels. This prevents the control system from monitoring spindle speed, position, and operational state, blocking spindle enable commands.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access Diagnostics > Drive > DRIVE-CLiQ in HMI or access NCK parameter MD20060 to verify spindle drive address assignment matches hardware configuration. Confirm drive is listed as 'Online' in the DRIVE-CLiQ topology.
Do not modify drive addresses while spindle is rotating.
2
Check physical DRIVE-CLiQ connector at spindle drive (usually X520 or similar) for loose connections, damaged pins, or corrosion. Reseat connector firmly with 840D control powered down.
Ensure machine is de-energized before inspecting connectors.
3
Verify spindle drive firmware version via HMI > Diagnostics > Drives or access spindle drive parameter p0010 (Device Type). Cross-reference against MD20093 (SpindleParameterSet) to ensure firmware compatibility with current NCK version.
4
Reset the spindle drive via HMI Emergency reset or power cycle control. Re-initialize DRIVE-CLiQ communication by selecting HMI > Diagnostics > System > Reinitialize Drives.

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