Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 89)

Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013 89
Detail Drive Configuration and Operation Chapter 1
Position Reference Selection
For point to point positioning set parameter 742 [Posit Ref Sel] = 2 “Pt to Pt”.
Parameter 758 [Pt-Pt Posit Ref ] becomes the reference for the position.
Position Reference Scaling
Position reference can be entered in user units by using the EGR scaling.
Parameters 745 [PositRef EGR Mul] and 746 [PositRef EGR Div] are used to
scale the position reference.
Example: To use degrees of motor revolution for the positioning units, scale as
follows:
With a 1024 encoder on the motor, this translates to 4096 counts per revolution
quadrature position counts.
This scaling translates the position reference of 0…360 degrees to 0…4096
position counts. This will allow you to enter degrees of motor rotation for the
position reference.
0
1
2
749
743
742
Interp Position
Posit Ref Sel
758
Aux PositRef
Pt-Pt Posit Ref
Selected
Position
Reference
Gear Rat
[ N ]
[ D ]
745
746
PositRef EGR Mul
PositRef EGR Div
Accum
∑
744 PositRef EGR Out
Deriv
Δ
Selected position
reference
Geared position
reference
Parameter 745 [PositRef EGR Mul] = 4096
Parameter 746 [PositRef EGR Div] = 360