
B--63003EN--1/02
4. REFERENCE POSITION ESTABLISHMENT
399
1882
Intervals of mark 2 of the linear scale with absolute addressing reference marks.
[Data type] 2--word axis
[Unitofdata] Detection units
[Valid data range] 0 to 99999999
Sets the intervals of mark 2 of the linear scale with absolute addressing
reference marks.
1883
Distance between the reference position and the origin of the linear scale with
absolute addressing reference marks
[Data type] 2--word axis
[Unitofdata] Detection units
[Valid data range] --99999999 to 99999999
Sets the distance between the reference position and the origin of the
linear scale with absolute addressing reference marks. The origin of the
scale is that point where marks 1 and 2 coincide.
Usually, the origin is an imaginary point which does not physically exist
(see the figure below).
If the reference position exists in the positive direction as viewed from the
scale origin, specify a positive value for this parameter.
If the reference position exists in the negative direction as viewed from
the scale origin, specify a negative value for this parameter.
Scale origin
Mark 1=Mark 2
Scale end
Mark 1 Mark 2
Mark 2Mark 1
Reference position
8.0 42.0 8.2 41.8
PRM.1821
PRM.1882
PRM.1883
Scale body