Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 150)

150 Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 3 Programming and Parameters
Applications File
Fil
e
Gr
ou
p
No
. Parameter Name & Description
See page 110 for symbol descriptions Values Da
ta
T
yp
e
Rela
ted
APPLIC
AT
IONS
PI
Con
tro
l
695 [PI Steady Thrsh]
Feed–forward threshold for PI.
• If the value if Par 758 [Feed Fwd PID] is less than the value of Par 695 [PI Steady
Thrsh] the integral regulation will be locked and the proportional gain assumes
the value set in Par 793 [PI Init Prop Gn].
• When the value of Par 758 [Feed Fwd PID] exceeds the value of Par 695 [PI
Steady Thrsh], the integral regulation with the gain set in Par 734 [PI Init Intgl
Gn] will be enabled.
• The Proportional / Integral (PI) block will maintain the gain values specified in
Pars 793 [PI Init Prop Gn] and 734 [PI Init Intgl Gn] for the time specified in Par
731 [PID Steady Delay]; once this time delay has elapsed, the values of [PI Init
Prop Gn] and [PI Init Intgl Gn] will be brought automatically to the values
specified in Pars 765 [PI Prop Gain PID] and 764 [PI Integral Gain], respectively.
Default:
Min/Max:
0
0 / 10000
16-bit
Int 758
731 [PID Steady Delay]
The amount of time for which the gains in Pars 793 [PI Init Prop Gn] and 734 [PI Init
Intgl Gn] will remain enabled after feed–forward has exceeded the threshold value
defined in Par 695 [PI Steady Thrsh].
Default:
Min/Max:
Units:
0
0 / 60000
ms
16-bit
Int 695,
734,
793
734 [PI Init Intgl Gn]
The initial value of the integral gain. This parameter is active when feed–forward is
greater than the value defined in Par 695 [PI Steady Thrsh], or Par 769 [Enable PI]
transitions from “0” (low) to “1” (high) and the amount of time defined in Par 731
[PID Steady Delay] has elapsed.
Default:
Min/Max:
10.00
0.00 / 100.00
Real 695,
731,
769
764 [PI Integral Gain]
Integral gain of the PI block.
Default:
Min/Max:
10.00
0.00 / 100.00
Real
765 [PI Prop Gain PID]
Proportional gain of the PI block.
Default:
Min/Max:
10.00
0.00 / 100.00
Real
769 [Enable PI]
Enables/Disables the PI portion of the PID regulator. If assigned to a digital input,
this parameter must be brought at a high logical level (+24V).
Default:
Options:
0 =
0 =
1 =
“Disabled”
“Disabled”
“Enabled”
16-bit
Int
771 [PI Output]
Output value of the PI block, adapted to the value between the values defined in
Pars 784 [PI Upper Limit] and 785 [PI Lower Limit]. When the drive is turned on,
the value of this parameter is acquired automatically based on the value of Par 779
[PI Central v sel] x 1000.
Default:
Min/Max:
Read Only
0 / 10000
16-bit
Int 784,
785,
779
776 [PI Central v1]
The first value that can be selected, via Par 779 [PI Central v sel], as the initial
output of the PID regulator’s integral component (corresponding to initial diameter
1). The value entered in this parameter must be less than the value set in Par 784
[PI Upper Limit] and greater than the value set in Par 785 [PI Lower Limit].
Default:
Min/Max:
0.00
Par 785 [PI Lower Limit] / Par 784 [PI
Upper Limit]
Real 784,
785,
779
777 [PI Central v2]
The second value that can be selected, via Par 779 [PI Central v sel], as the initial
output of the PID regulator’s integral component (corresponding to initial diameter
2). The value entered in this parameter must be less than the value set in Par 784
[PI Upper Limit] and greater than the value set in Par 785 [PI Lower Limit].
Default:
Min/Max:
0.00
Par 785 [PI Lower Limit] / Par 784 [PI
Upper Limit]
Real 784,
785,
779
778 [PI Central v3]
The third value that can be selected, via Par 779 [PI Central v sel], as the initial
output of the PID regulator’s integral component (corresponding to initial diameter
3). The value entered in this parameter must be less than the value set in Par 784
[PI Upper Limit] and greater than the value set in Par 785 [PI Lower Limit].
Note: This parameter can be assigned to an analog input.
Default:
Min/Max:
0.00
Par 785 [PI Lower Limit] / Par 784 [PI
Upper Limit]
Real 784,
785,
779
A
A
A
A
A
A
A
A
A
A