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Siemens SINUMERIK Controller
Servo/Axis · Intermediate · 30-120 minutes
Siemens 301704 - Axis drive pole pair width/division of linear scale (internal) out of
With linear motors the pole-pair width and graduations data is used for calculating the equivalent (internal) pole pair number and (internal) encoder marks. For this it is necessary that the encoder marks correspond to one or x pole pair widths as an integer. This error message is output if the result is not an integer pole pair width/graduations*x (to x=16) or if the calculated internal encoder marks value is too high. Absolute interpretation as an integer if the result is within a +/- 0.001 tolerance Control reaction: Mode group not ready. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm.
301704
Siemens 301704 - Axis drive pole pair width/division of linear scale (internal) out of
Axis drive pole pair width/division of linear scale (internal) out of
With linear motors the pole-pair width and graduations data is used for calculating the equivalent (internal) pole pair number and (internal) encoder marks. For this it is necessary that the encoder marks correspond to one or x pole pair widths as an integer. This error message is output if the result is not an integer pole pair width/graduations*x (to x=16) or if the calculated internal encoder marks value is too high. Absolute interpretation as an integer if the result is within a +/- 0.001 tolerance Control reaction: Mode group not ready. Channel not ready. NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm.
Safety
- Drive/power/encoder circuit: hazardous voltages may remain in the DC link after power-off. Lock out / tag out, wait for discharge per the drive documentation, and use qualified personnel only.
Common Causes
- With linear motors the pole-pair width and graduations data is used for calculating the equivalent (internal) pole pair number and (internal) encoder marks.
- For this it is necessary that the encoder marks correspond to one or x pole pair widths as an integer.
- This error message is output if the result is not an integer pole pair width/graduations*x (to x=16) or if the calculated internal encoder marks value is too high.
Troubleshooting Steps
- 1Please inform the authorized personnel/service department.
- 2Long traversing paths: It is advisable to use a length measuring system where the encoder marks match x* pole pair widths as integer.
- 3Short traversing paths: With short traversing paths, only a small error can accumulate and hardly affect the heating and the maximum power that can be reached if the encoder marks do not comply with the +/-0.001 tolerance.
- 4Then it is advisable to slightly modify the pole pair width: Example: Pole pair width: 56.8 mm, graduations: 2.7 µm => Pole pair number = 1, encoder marks = 21037.037 => error Avoid the error by entering pole pair width = 56.7999 mm. => Pole pair number = 1, encoder marks = 21037.0 => no error
- 5Switch control OFF - ON
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