Mg11Cd22 - Vlt Is A Registered Danfoss Trademark - Danfoss VLT FC 100 Series Programming Manual

Parameter Description
20-13 Minimum Reference/Feedb.
Range:
0.000 [ -999999.999 -
ProcessCtrlUnit par. 20-14
*
ProcessCtrlUnit]
NOTE!
If operating with 1-00 Configuration Mode set for Open-
loop [0], 3-02 Minimum Reference must be used.
20-14 Maximum Reference/Feedb.
Range:
100.000 [ par. 20-13 -
ProcessCtrlUnit 999999.999
*
ProcessCtrlUnit]
NOTE!
If operating with 1-00 Configuration Mode set for Open-
loop [0], 3-03 Maximum Reference must be used.
NOTE!
The dynamics of the PID controller will depend on the
value set in this parameter. See also 20-93 PID Proportional
Gain.
20-13 Minimum Reference/Feedb. and20-14 Maximum
Reference/Feedb. also determine the feedback range when
using feedback for display readout with 1-00 Configuration
Mode set for Open-loop [0]. Same condition as above.
®
VLT HVAC Drive Programming Guide
Function:
Enter the desired minimum
value for the remote
reference when operating
with 1-00 Configuration
Mode set for Closed-loop
[3] operation. Units are set
in 20-12 Reference/Feedback
Unit.
Minimum feedback will be
-200% of either the value
set in 20-13 Minimum
Reference/Feedb. or in
20-14 Maximum Reference/
Feedb., which ever numeric
value is the highest.
Function:
Enter the maximum
reference/feedback for
closed-loop operation.
The setting determines
the highest value
obtainable by summing
all reference sources for
closed-loop operation.
The setting determines
100% feedback in open-
loop and closed-loop
(total feedback range:
-200% to +200%).
MG11CD22 - VLT ® is a registered Danfoss trademark
3.18.2 20-2* Feedback & Setpoint
This parameter group is used to determine how the
adjustable frequency drive's PID controller will use the
three possible feedback signals to control the output
frequency of the adjustable frequency drive. This group is
also used to store the three internal setpoint references.
20-20 Feedback Function
Option: Function:
This parameter determines how the three
possible feedbacks will be used to control the
output frequency of the adjustable frequency
drive.
[0] Sum Sum [0] sets up the PID Controller to use the
sum of Feedback 1, Feedback 2 and Feedback 3
as the feedback.
NOTE!
Any unused feedbacks must be set to No
Function in 20-00 Feedback 1 Source,
20-03 Feedback 2 Source, or 20-06 Feedback
3 Source.
The sum of Setpoint 1 and any other references
that are enabled (see parameter group 3-1*) will
be used as the PID controller's setpoint
reference.
[1] Difference Difference [1] sets up the PID controller to use
the difference between Feedback 1 and
Feedback 2 as the feedback. Feedback 3 will not
be used with this selection. Only Setpoint 1 will
be used. The sum of Setpoint 1 and any other
references that are enabled (see parameter
group 3-1*) will be used as the PID controller's
setpoint reference.
[2] Average Average [2] sets up the PID Controller to use the
average of Feedback 1, Feedback 2 and
Feedback 3 as the feedback.
NOTE!
Any unused feedbacks must be set to No
Function in 20-00 Feedback 1 Source,
20-03 Feedback 2 Source, or 20-06 Feedback
3 Source. The sum of Setpoint 1 and any
other references that are enabled (see
parameter group 3-1*) will be used as the
PID controller's setpoint reference.
[3] Minimum Minimum [3] sets up the PID controller to com
Feedback 1, Feedback 2 and Feedback 3 and
*
use the lowest value as the feedback.
3 3
3-115