
406 Rockwell Automation Publication 750-PM001J-EN-P - October 2014
Appendix A PowerFlex 755 Control Block Diagrams
Figure 40 - Speed Control - Reference (3)
Limit
520
Max Fwd Speed
Max Rev Speed
521
Max Speed Limit
Spd Ref After
Final Limit
[9A2]
S Curve Accel, Decel
Accel Time 1
Accel Time 2
539
Ramp
S Curve
Spd Options Ctrl
(Ramp Hold)
635
1
Spd Options Ctrl
541
Jog Acc Dec Time
76
Inertia Dec Gain
Inertia Acc Gain
696
Total Inertia
697
699
Inertia Comp
Out
Inertia
Comp
Inertia CompMode
Int Ramp Ref
695
700
Speed Comp Gain
666
667
Speed Comp Out
Speed
Comp
Speed Comp Sel
Ramped Ref
Rate Ref
0
665
596
Speed Rate
Ref
139
Virtual Encoder
140
142
Delayed Spd Ref
Virtual Enc Psn
Virtual EncDelay
One
Scan
Delay
One
Scan
Delay
PsnReg Spd Out
Position Reg Output
594
Ramped Spd Ref
1
0
PID Output Sel
(Speed Trim)
0
1079
Drive Status 1
(Jogging)
0
From
Process Ctrl
[28E3]
1093
PID Output Meter
From Posit Reg
[12I5]
843
X
555
0
1
Drive Status 1
(Jogging)
935 17
935 17
0
Spd Ref Scale
Final Speed Ref Limits
Speed Comp
Inertia Comp
PI Speed Trim
Virtual Encoder
1
2
3
4
5
6
BA
D
C
FE HG
I
Vector Ramp and Rate Select
141
Virtual Enc EPR
(Edges Per Rev)
588
589
SpdRef FltrGain
Spd Ref Fltr BW
Lead Lag
(kn * s)+ wn
s + wn
590
Spd Ref Filter
Speed Ref Filter
LPF
698
Inert Comp
LPFBW
1,0
535
536
0,1
879
8
Drive Logic Rslt
(Accel Time 1, 2)
d
dt
d
dt
596
0
d
dt
1
0
Spd Options Ctrl
(Delayed Ref)
9
Decel Time 1
Decel Time 2
1,0
537
538
0,1
879
10
Drive Logic Rslt
(Decel Time 1, 2)
11
540
Speed Control
595
Filtered Spd Ref
0
1
2
Disabled
0
1
2
3
2
≠2
945
2
At Limit Status
(MaxSpeed Lmt)
Speed Control – Reference (3)
Flux Vector
635 0
(Ramp Disable)
635
2
(StpNoSCrvAcc)
Not Used
Ext Ramped Ref
Speed Rate Ref
[35H3]
[35H3]
[28C2]
[11C5]
[11C5]
Torq
FF
To Torq
Ctrl
[23B3]
Int Ramp Ref
To Torq Ctrl
(Friction Comp)
[23A1]
Skip
Bands
526
527
Skip Speed 1
528
529
Skip Speed
Band
Skip Speed 2
Skip Speed 3
1
0
Drive Status 1
(Jogging)
0
935 18
1
0
Drive Status 1
(Stopping)
1
0
0
Limited Spd
Ref
593
[6H4]
935
17
Skip Bands
Start/Stop
2
Commanded
SpdRef
Stopping
or Not Active
Not Stopping
and Active
OR
Drive Status 1
(Running)
Drive Status 2
(Autotuning)
935
16
936
9
Traverse/
P-Jump
Sync
Speed
Change
Fiber Application
1120
Fiber Control
1121
Fiber Status
1122 Sync Time
1126P Jump
1125
Max Traverse
1123Traverse Inc
1124Traverse Dec
PF755 Rev_10.a
Page 7
Spd FF
From
Psn Ref
[11I5]
x
848
Psn Gear Ratio
935 17
Drive Status 1
(Jogging)
0
1
0
635
8
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