60 Rockwell Automation Publication PFLEX-RM003E-EN-E - January 2011
Chapter 1 Detailed Drive Operation
Configuring the Indexer
Parameter 797 [BasicIndx Step] sets the position units for each indexer step.
When the indexer is used in conjunction with the point to point loop, parameters
745 [PositRef EGR Mul] and 746 [PositRef EGR Div] are used to scale the
position reference.
The indexer could be used in conjunction with the point to point position loop
or with a position offset. To use the indexer to control the point to point position,
link parameter 758 [Pt-Pt Posit Ref ] to parameter 799 [BasicIndx Output].
Refer to Position Loop - Point to Point
on page 96 for further details on using the
point to point loop. To use the indexer to control a position offset link parameter
753 [Posit Offset 1] or parameter 754 [Posit Offset 2] to parameter 799
[BasicIndx Output]. Note that the position offset can be used in either the Point
to Point Position or the Position Follower modes.
Parameter 798 [BasicIndx Preset] is a value that is preloaded into the indexer
output on drive power up. By default, [BasicIndx Preset] is set to 0. Toggling
parameter 740 [Position Control] bit 14 “BscIndx Prst” will also preload the
value of [BasicIndx Preset] into the indexer output.
Controlling the Indexer from Digital Inputs:
Program one of the digital inputs, parameters 825 [Dig In1 Sel] through 830
[Dig In6 Sel], to 21 “Indx Step.” Toggle that digital input to index forward.
Program a second digital input, parameters 825 [Dig In1 Sel] through 830 [Dig
In6 Sel], to 22 “Indx StepRev.” Toggle that digital input to index reverse.
740 12
740 13
Power up
OR
BasicIndx Output
(BscIndx Step)
(BscIndx Rev)
Position Control
BasicIndx Step
Position Control
BasicIndx Preset
OR
OR
740 15
740 14
X
797
(BscIndxStpRv)
+
+
798
799
(BscIndx Prst)
740 11 (BscIndx Enbl)
1
-1
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