What causes Siemens SINUMERIK alarm 61373?

Spindle position (SPOS) feedback not enabled or properly configured in machine data. Probe measurement cycle called on machine without spindle orientation capability. Spindle encoder or position feedback signal disconnected or malfunctioning. Incorrect measuring cycle syntax or parameters for current machine configuration. Machine data settings do not match actual hardware capabilities.

How do I fix Siemens SINUMERIK alarm 61373?

1. Verify spindle position feedback hardware is installed and connected; check encoder signal at drive terminal with multimeter or oscilloscope 2. Review machine data to confirm SPOS capability is enabled and spindle encoder parameters are correctly configured 3. Cross-reference the measuring cycle program block with machine documentation to ensure cycle is appropriate for machine equipment 4. Test spindle orientation independently using SPOS command in manual mode to confirm position feedback is functional 5. If SPOS capable hardware exists but alarm persists, reload or regenerate machine data from backup and verify parameter transfer to control

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 61373

Siemens 840D 61373 - Channel block: Mono-directional probe requires SPOS-capable

Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check machine equipment.

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

61373

Siemens 840D 61373 - Channel block: Mono-directional probe requires SPOS-capable

Channel block: Mono-directional probe requires SPOS-capable

Alarm can be triggered by following measuring cycles: all measuring cycles. Remedy: Check machine equipment.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Spindle position (SPOS) feedback not enabled or properly configured in machine data
Probe measurement cycle called on machine without spindle orientation capability
Spindle encoder or position feedback signal disconnected or malfunctioning
Incorrect measuring cycle syntax or parameters for current machine configuration
Machine data settings do not match actual hardware capabilities

Troubleshooting Steps

1Verify spindle position feedback hardware is installed and connected; check encoder signal at drive terminal with multimeter or oscilloscope
2Review machine data to confirm SPOS capability is enabled and spindle encoder parameters are correctly configured
3Cross-reference the measuring cycle program block with machine documentation to ensure cycle is appropriate for machine equipment
4Test spindle orientation independently using SPOS command in manual mode to confirm position feedback is functional
5If SPOS capable hardware exists but alarm persists, reload or regenerate machine data from backup and verify parameter transfer to control

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