PowerFlex Digital DC Drive User Manual -
Publication 20P-UM001C-EN-P - July 2008
3-34
Programming and Parameters
Applications File
Fil
e
Gr
oup
No.
Parameter Name & Description
See
for symbol descriptions
Values
Related
APPLICA
T
IONS
PI Contr
o
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
758
764
[PI Integral Gain]
Integral gain of the PI block.
Default:
Min/Max:
10.00
0.00 / 100.00
765
[PI Prop Gain PID]
Proportional gain of the PI block.
Default:
Min/Max:
10.00
0.00 / 100.00
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”
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
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]
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 (corre-
sponding to initial diameter 2). The value entered in this parameter
must be less than the value set in Par 784 [PI Upper Limit] and great-
er 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]
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]
784,
785,
779
A
A
A
A
A
A
A
A
