7-42 Process PID Output Pos. Clamp
Range:
Function:
100 %
*
[ par. 7-41 - 100 %] Enter a positive limit for the
process PID controller output.
7-43 Process PID Gain Scale at Min. Ref.
Range:
Function:
100 %
*
[0 -
100 %]
Enter a scaling percentage to apply to the
process PID output when operating at the
minimum reference. The scaling percentage is
adjusted linearly between the scale at
minimum reference (
) and the scale at
maximum reference (
7-44 Process PID Gain Scale at Max. Ref.
Range:
Function:
100 %
*
[0 -
100 %]
Enter a scaling percentage to apply to the
process PID output when operating at the
maximum reference. The scaling percentage is
adjusted linearly between the scale at
minimum reference (
) and the scale at
maximum reference (
7-45 Process PID Feed Fwd Resource
Option:
Function:
[0]
*
No function
Select which frequency converter input
should be used as the feed-forward
factor. The factor is added to the output
of the PID controller. This increases
dynamic performance.
[1]
Analog Input 53
[2]
Analog Input 54
[7]
Frequency input
29
[8]
Frequency input
33
[11] Local bus
reference
[20] Digital pot.meter
[21] Analog input
X30/11
[22] Analog input
X30/12
[29] Analog Input
X48/2
[32] Bus PCD
Selects a fieldbus reference configured
by
parameter 8-02 Control Word Source
Change
for the bus used to make
the feed forward available in
parameter 7-48 PCD Feed Forward
. Use
7-45 Process PID Feed Fwd Resource
Option:
Function:
index 1 for feed forward [748] (and
index 2 for reference [1682]).
7-46 Process PID Feed Fwd Normal/ Inv. Ctrl.
Option:
Function:
[0]
*
Normal Select
[0] Normal
to set the feed-forward factor to
treat the FF resource as a positive value.
[1]
Inverse Select
[1] Inverse
to treat the feed-forward resource
as a negative value.
7-48 PCD Feed Forward
Range:
Function:
0
*
[0 - 65535 ] This parameter contains the value of
parameter 7-45 Process PID Feed Fwd Resource
[32] Bus PCD
.
7-49 Process PID Output Normal/ Inv. Ctrl.
Option:
Function:
[0]
*
Normal Select
[0] Normal
to use the resulting output from
the process PID controller as is.
[1]
Inverse Select
[1] Inverse
to invert the resulting output
from the process PID controller. This operation is
performed after the feed-forward factor is applied.
3.8.8 7-5* Ext. Process PID Ctrl.
This parameter group is only used if
parameter 1-00 Config-
uration Mode
is set to
[7] Extended PID speed CL
or
[8]
Extended PID Speed OL
.
3.8.9 7-50 Process PID Extended PID
7-50 Process PID Extended PID
Option:
Function:
[0]
Disabled Disable the extended parts of the process PID
controller.
[1]
*
Enabled Enable the extended parts of the PID controller.
3.8.10 7-51 Process PID Feed Fwd Gain
7-51 Process PID Feed Fwd Gain
Range:
Function:
1
*
[0 -
100 ]
The feed forward is used to obtain the required level
based on a well-known signal available. The PID
controller then only takes care of the smaller part of
the control, necessary because of unknown
characters. The standard feed-forward factor in
parameter 7-38 Process PID Feed Forward Factor
is
always related to the reference, whereas
parameter 7-51 Process PID Feed Fwd Gain
has more
Parameter Descriptions
Programming Guide
MG33MP02
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