What causes Siemens SINUMERIK alarm 61802?

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 61802?

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 61802 for detailed remedy instructions.

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 61802

Siemens 840D 61802 - Channel block: Wrong axis type

Alarm 61802 occurs when an NC program attempts to command motion on an axis that has been configured as a spindle rather than a linear or rotary axis in the machine data. This axis type mismatch between program intent and actual axis configuration causes the SINUMERIK 840D control to reject the block execution.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

61802

Siemens 840D 61802 - Channel block: Wrong axis type

Channel block: Wrong axis type

Root Cause Summary

Alarm 61802 occurs when an NC program attempts to command motion on an axis that has been configured as a spindle rather than a linear or rotary axis in the machine data. This axis type mismatch between program intent and actual axis configuration causes the SINUMERIK 840D control to reject the block execution.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access NCK Machine Data via HMI: Diagnostics > Machine > Axis > [Alarm axis name]. Verify MD20050 (AxisType) value.
2
If MD20050 = 3 (Spindle), change to MD20050 = 1 (Linear) or MD20050 = 2 (Rotary) depending on actual machine geometry.
Power down control and make backup of machine data before modification.
3
Verify related MD parameters: MD20010 (AxisName), MD20020 (Axis initialisation type), and MD20030 (Axis feedrate type) are consistent with new axis assignment.
4
Save machine data changes and perform warm restart (POWER RESET) for changes to take effect in NCK.

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