Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-45 minutes

Alarm 61308

Siemens 840D 61308 - Channel Block: Check measuring path _FA

A traversing path for measuring was generated whose size was specified by parameter _FA that describes the maximum distance before and after the switching position (workpiece edge) and that must have a value greater than 0. Alarm can be triggered by following measuring cycles: all measuring cycles.

Siemens SINUMERIKServo/AxisIntermediate30-45 minutes

61308

Siemens 840D 61308 - Channel Block: Check measuring path _FA

Channel Block: Check measuring path _FA

A traversing path for measuring was generated whose size was specified by parameter _FA that describes the maximum distance before and after the switching position (workpiece edge) and that must have a value greater than 0. Alarm can be triggered by following measuring cycles: all measuring cycles.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Parameter _FA is set to zero or a negative value
  • Measuring cycle called without proper initialization of _FA parameter
  • Incorrect workpiece edge detection setup in the measuring cycle definition
  • Parameter _FA value is too small relative to the actual workpiece dimensions or sensor range

Troubleshooting Steps

  1. 1Verify parameter _FA is defined with a positive value greater than 0 in the active measuring cycle; consult the part program and machine parameter settings
  2. 2Check the measuring cycle syntax and ensure _FA parameter is properly passed with valid numerical input before cycle execution
  3. 3Review the workpiece edge position and confirm the _FA value provides adequate clearance before and after the switching position for reliable detection
  4. 4Test the measuring cycle with an increased _FA value to determine if the alarm clears; adjust based on workpiece geometry and sensor specifications
  5. 5Clear the alarm and re-execute the measuring cycle after parameter correction; monitor for successful path generation

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