What causes Siemens SINUMERIK alarm 61401?

Probe setpoint value exceeds machine software limit boundaries. Incorrect probe offset or tool length compensation applied to cycle. Software limit values not properly configured for probe operation range. Probe cycle parameters programmed outside valid traversal envelope. Coordinate system offset or origin shift causing effective position to exceed limits.

How do I fix Siemens SINUMERIK alarm 61401?

1. Verify setpoint values in the active probe cycle (CYCLE961/971/976/977/978/998) are within machine travel limits; compare against machine data software limit parameters 2. Check probe offset, tool length offset, and any active coordinate system shifts (G54-G59) to ensure combined position does not exceed boundaries 3. Review machine soft limit settings in Machine Data and confirm they match physical machine envelope and probe accessibility range 4. Test probe movement manually using machine jog mode to verify actual achievable positions match programmed limits 5. Reload and verify probe cycle parameters and setpoint values in part program; recalculate required positions accounting for probe geometry

Siemens SINUMERIK codes

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Siemens SINUMERIK Controller

Probing · Intermediate · 30-45 minutes

Alarm 61401

Siemens 840D 61401 - Channel block: Probe not switching, traversing path limitation

The alarm is triggerd by the following cycles: CYCLE961, CYCLE971, CYCLE976, CYCLE977, CYCLE978, CYCLE998 The position defined by a setpoint value cannot be reached, as the software limit position has been exceeded. Remedy: Check specified setpoint value. 2-546 © Siemens AG, 2006. All rights reserve

Siemens SINUMERIKProbingIntermediate30-45 minutes

61401

Siemens 840D 61401 - Channel block: Probe not switching, traversing path limitation

Channel block: Probe not switching, traversing path limitation

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Common Causes

Probe setpoint value exceeds machine software limit boundaries
Incorrect probe offset or tool length compensation applied to cycle
Software limit values not properly configured for probe operation range
Probe cycle parameters programmed outside valid traversal envelope
Coordinate system offset or origin shift causing effective position to exceed limits

Troubleshooting Steps

1Verify setpoint values in the active probe cycle (CYCLE961/971/976/977/978/998) are within machine travel limits; compare against machine data software limit parameters
2Check probe offset, tool length offset, and any active coordinate system shifts (G54-G59) to ensure combined position does not exceed boundaries
3Review machine soft limit settings in Machine Data and confirm they match physical machine envelope and probe accessibility range
4Test probe movement manually using machine jog mode to verify actual achievable positions match programmed limits
5Reload and verify probe cycle parameters and setpoint values in part program; recalculate required positions accounting for probe geometry

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