Rockwell Automation 20D PowerFlex 700S with Phase I Control Reference Manual - Manual (Page 136)

136 Rockwell Automation Publication PFLEX-RM002D-EN-E - August 2013
Chapter 1 Detail Drive Configuration and Operation
Parameter 63 [Virt Encdr Dlyed] is a 32 bit integer that contains the pulse count
output of the virtual encoder block delayed by one scan of the speed reference
loop. This parameter can be used to send a virtual position reference over
SynchLink for position follower applications.
Speed Reference Filter
A lead lag filter can be turned on by setting parameter 153 [Control Options] bit
1 - “Sref Filt En” on. Parameter 35 [SpdRef Filt Gain] sets the gain for the filter
and parameter 36 [SpdRef Filt BW] sets the bandwidth for the filter.
Speed Reference Scale
The speed reference value up to this point is multiplied by the scaling parameter
38 [Speed Ref Scale]. [Speed Ref Scale] is applied to all of the selected speed
references, as opposed to the specific scaling parameters for speed reference 1 and
2. [Speed Ref Scale] is a linkable parameter. This allows the speed reference value
to be scaled “dynamically” with an input signal if desired. An example would be
to have an analog input linked to the scale parameter. The speed reference and the
scale would then affect the value sent to the speed regulator.
61
43
62
63
S Curve Spd Ref
Virtual Encoder
4x internal
Virt Encoder PPR
Virt Encdr Posit
Virt Encdr Dlyed
Delay
One
Scan
153 01
35
36
44
Control Options
(SRef Filt En)
SpdRef Filt Gain
SpdRef Filt BW
Filtered Spd Ref
Lead Lag
(kn * s)+ wn
s + wn
X
38
46
Scaled Spd Ref
Speed Ref Scale