Rockwell Automation 20D PowerFlex 700S AC Drives with Phase II Control Programming Manual User Manual
Page 36
36
Rockwell Automation Publication 20D-PM001C-EN-P - July 2013
Chapter 2
Programming and Parameters
62
Virt Encdr Posit
A 32 bit pulse accumulator of the virtual encoder. The accumulated pulse count is equivalent to the hardware
accumulator of a real encoder. It accumulates at a rate of 4x the value placed in
[Virt Encoder EPR]. The
accumulator starts at zero upon position enable.
Default:
Min/Max:
0
-/+2147483648
RO 32-bit
Integer
63
Virt Encdr Dlyed
One sample period delayed output of
[Virt Encdr Posit]. Used in some applications to phase synchronize
position reference through SynchLink. The master is delayed one sample while the downstream drives update
their position references – then all drives sample position simultaneously. The downstream drives do not select a
delay.
Default:
Min/Max:
0
-/+2147483648
RO 32-bit
Integer
64
FricComp Spd Ref
Supplies a speed input to the Friction Compensation algorithm. This input is normally a speed reference from a
motion planner or ramped speed reference. It will trigger a torque feed forward response depending on its value.
Default:
Min/Max:
Units:
0.0000
-/+8.0000 P.U.
rpm
Y
RW Real
65
FricComp Setup
Enter or write a value to configure the friction compensation algorithm. This is a packed word of 3 digits. Each
digit has a possible selection of 10 levels.
• The least significant digit sets the speed threshold in intervals of 0.0005 P.U. speed.
• The next (middle) digit sets the hysteresis band for the “units” digit in intervals of 0.0005 P.U. velocity.
• The most significant digit sets the number of time steps from stick to slip, each step is 0.002 sec.
Example: Value = 524 means: 5 time steps between stick and slip, each of 0.002 sec. duration, 2 counts of
hysteresis or 0.001 pu_speed (each count is 0.0005 pu_speed), and 4 counts or 0.002 pu_speed is the trigger
threshold (each count is 0.0005 pu_speed).
Default:
Min/Max:
325
0/999
Y
RW 16-bit
Integer
66
FricComp Stick
The torque needed to break away from zero speed. By nature of friction, the break away sticktion will always be
greater than the running friction.
Default:
Min/Max:
Units:
0.1500
0.0000/8.0000
P.U.
Y
RW Real
67
FricComp Slip
The torque level to sustain very low speed – once “break away” has been achieved. By nature of friction, viscous
friction will always be less than sticktion.
Default:
Min/Max:
Units:
0.1000
0.0000/8.0000
P.U.
Y
RW Real
68
FricComp Rated
The torque needed to keep the motor running at base speed and with no process loading. The friction
compensation algorithm assumes a linear or viscous component of friction between
[FricComp Slip] and
Par 68 [FricComp Rated].
Default:
Min/Max:
Units:
0.2000
0.0000/8.0000
P.U.
Y
RW Real
69
FricComp Trq Add
The torque reference output of the Friction Compensation function. A value of 1.0 represents rated torque of the
motor.
Default:
Min/Max:
Units:
Scale:
0.0000
-/+8.0000 P.U.
P.U.
Motor P.U. Torque
RO Real
71
Filtered SpdFdbk
Displays the motor speed feedback value output from the feedback Lead/Lag filter.
Default:
Min/Max:
Units:
Scale:
0.0000
-/+14112.0000
rpm
[Motor NP RPM] = 1.0 P.U.
RO Real
72
Scaled Spd Fdbk
Displays the product of the speed feedback and
[Spd Fdbk Scale]. This parameter is for display only.
Default:
Min/Max:
Scale:
0.0000
-/+2200000000.0000
[Motor NP RPM] = 1.0 P.U.
RO Real
73
Spd Fdbk Scale
A user-adjustable scale factor (multiplier) for speed feedback. It is multiplied with speed feedback to produce
[Scaled Spd Fdbk].
Default:
Min/Max:
1.0000
-/+2200000000.0000
Y
RW Real
74
Atune Spd Ref
Sets the maximum speed of the motor during the Flux current and inertia tests.
Default:
Min/Max:
Units:
Scale:
Par 4 x 0.8500
Par 4 x 0.1000/Par 4 x 1.0000
rpm
[Motor NP RPM] = 1.0 P.U.
RW Real
75
Rev Speed Limit
Sets a limit on the speed reference in the negative direction. This value can be entered as a negative value or zero.
The maximum value equals
[Maximum Freq] x 0.95.
Default:
Min/Max:
Units:
Scale:
Par 4 x -1.2500
-8.0000/0.0000
rpm
[Motor NP RPM] = 1.0 P.U.
RW Real
76
Fwd Speed Limit
Sets a limit on the speed reference in the positive direction. This value can be entered as a positive value or zero.
The maximum value equals
[Maximum Freq] x 0.95.
Default:
Min/Max:
Units:
Scale:
Par 4 x 1.2500
0.0000/8.0000
rpm
[Motor NP RPM] = 1.0 P.U.
RW Real
77
Spd Ref TP Sel
Enter or write a value to select speed reference data displayed in
[Spd Ref TP Data] and
[Spd Ref TP RPM].
Note: The values for options 7, 8, & 9 were changed to “Reserved” for firmware version 2.004.
Default:
Options:
0 =
0 =
1 =
2 =
3 =
4 =
5 =
6 =
7 =
8 =
9 =
10 =
11 =
“Zero”
“Zero”
12 = “S Crv Match”
“User Ref”
13 = “S Array size”
“Logic Select”
14 = “S Array Indx”
“Lgc Sel Ref”
15 = “Reserved”
“Ramp Spd Ref”
16 = “Scl Ext Trim”
“Ramp In”
17 = “Trim FiltOut”
“Filt Spd Ref”
18 = “Ref w/Trim”
“Reserved”
19 = “Amp Lim2 In”
“Reserved”
20 = “Amp LimStat2”
“Reserved”
21 = “Amp Lim2 Out”
“Amp Lim Stat”
22 = “FTD Ramp Out”
“Ramp Match”
23 = “Reserved”
No.
Name
Description
Values
Link
able
Re
ad
-Write
Da
ta
T
yp
e