301704

Axis %1 drive %2 pole pair width/division of linear scale (internal) out of range

Parameters:

%1 = NC axis number

%2 = Drive number

Definitions:

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.

Reactions:

-    Mode group not ready.

-    Channel not ready.

-    NC Start disable in this channel.

Remedy:

-    Interface signals are set.

-    Alarm display.

-    NC Stop on alarm.

Please inform the authorized personnel/service department.

Long traversing paths: It is advisable to use a length measuring system where the encoder marks match x* pole pair widths as integer.

Short 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. Then it is advisable to slightly modify the pole pair width:

Example:

Pole pair width: 56.8 mm, graduations: 2.7 pm

=> 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

Program Continuation:

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