
Rockwell Automation Publication 750-PM001J-EN-P - October 2014 411
PowerFlex 755 Control Block Diagrams Appendix A
Figure 45 - Position Control - Regulator
Gear Rat
[ N ]
[ D ]
816
817
Psn EGR Mult
Psn EGR Div
815
847
P Gain
kp
839
I Gain
ki
s
838
Limit
841
840
842
Gear Rat
[ N ]
[ D ]
825
826
836
837
Droop
846
Limit
845
844
Psn
Actual
Psn Load Actual
Psn Reg Ki
Psn Reg Droop
Psn Reg Kp
PsnReg IntgrlOut
Psn Reg Status
PReg Pos Int Lmt
PReg Neg Int Lmt
Psn Reg Status
Psn Ref EGR Out
LdPsn Fdbk Mult
LdPsn Fdbk Div
PReg Neg Spd Lmt
PReg Pos Spd Lmt
PsnReg
Spd Out
835
Psn Error
Notch
II
R
724
5
724 6
Calib
Const
Calib
Const
724 3
724
4
831
830
PsnNtchFltrDepth
PsnNtchFltrFreq
+
+
+
-
+
-
+
-
Psn Fdbk
Position Reference Offset
Electronic Gear Ratio
*4
+
+
Intgrtr Enbl
Intgrtr Hold
7211
7215
&
From
Posit Ref
[11I4]
Notch Filter
Speed Limits
PI Regulator
Inv
Σ
Σ
Σ
723
Psn Command
Σ
Σ
725
Xzero
Preset
721
4
Position Control
(Zero Psn)
Zero
Position
1
2
3
4
5
6
BA
D
C
FE HG
I
Pos Fdbk Scaling
Σ
Spd/Trq
Modes
Psn
Modes
0
843
832
834
Psn Out FltrGain
Psn Out Fltr BW
Lead Lag
(kn * s)+ wn
s + wn
833
Psn Out Fltr Sel
Output Filter
Psn Selected
Ref
722
Position Control – Regulator
721
0
Position Control
1
Reserved
Offset ReRef
2
OffsetVel En
3
Zero Psn
4
Intgrtr Hold
5
Intgrtr En
6
PsnWtch1Arm
7
PsnWatch1Dir
724
0
Psn Reg Status
1
Spd Lmt Hi
Spd Lmt Lo
2
Integ Lmt Hi
3
Integ Lmt Lo
4
Intgrtr Hold
5
6
Offset ReRef
7
8
PsnW1Detect
9
InPsn Detect
10
11
Psn Intgrtr
8 PsnWtch2Arm
9
PsnWatch2Dir
PsnW2Detect
OffsetIntgrtr
Psn Reg Actv
ReRef
Rate Lim
824
Psn Offset Vel
Position Control
(OffsetReRef)
Position Control
(OffsetVel En)
721
3
+
+
721
2
0
1
Integ Lmt Lo
Integ Lmt Hi
Actv SpTqPs
Mode
Spd Lmt Lo
Spd Lmt Hi
313
Psn Offset 1 Sel
820
821
Other Ref
Sources
Psn Offset 1
Parameter
Selection
Psn Offset 2 Sel
822
823
Other Ref
Sources
Psn Offset 2
Parameter
Selection
Load Psn FdbkSel
136
Other Ref
Sources
Psn Fdbk
Parameter
Selection
847
[3H4]
[3H4]
[13D4]
[23D5]
To Spd Ref
[7E5]
10
Add Spd Ref
Position Control
1. If Zero Psn [P721 Bit 04] is set, Psn
Actual [P836] is loaded with
Psn Fdbk [P847] –
Zero Position
[P725].
2. Else, if Homing function is enabled,
Psn Actual [P836] is loaded with
Psn Fdbk [P847] .
3. Else, Psn Command [P723] and
Psn Ref EGR Out [P815] are loaded
with Psn Actual
[P836]
*4. EGR is skipped when Point to
Point Position control is active
(included Profiler, PLL with PTP)
Parameter initializations performed with
Position Regulator INACTIVE
EGR is skipped when
Point to Point Position
control is active.
Virtual
Encoder
From
Homing
[17H3]
848
Psn Gear Ratio
Motor Speed
Gear Output Spd
(
)
PF755 Rev_10.a
Page 12
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