Danfoss VLT AQUA Drive FC 200 Programming Manual page 137

Parameter Description
20-20 Feedback Function
Option: Function:
the PID Controller will use the feedback/setpoint
pair in which the difference between the
feedback and setpoint is the least.
NOTICE!
If only two feedback signals are used, the
feedback that is not to be used must be
set to No Function in 20-00 Feedback 1
Source, 20-03 Feedback 2 Source, or
20-06 Feedback 3 Source. Note that each
setpoint reference will be the sum of its
respective parameter value and any other
references that are enabled (see parameter
group 3-1* References).
[6] Multi [6] Multi-setpoint maximum sets up the PID
Setpoint controller to calculate the difference between
Max Feedback 1 and Setpoint 1, Feedback 2 and
Setpoint 2, and Feedback 3 and Setpoint 3. It
will use the feedback/setpoint pair in which the
feedback is farthest above its corresponding
setpoint reference. If all feedback signals are
below their corresponding setpoints, the PID
Controller will use the feedback/setpoint pair in
which the difference between the feedback and
the setpoint reference is the least.
NOTICE!
If only two feedback signals are used, the
feedback that is not to be used must be
set to No Function in 20-00 Feedback 1
Source, 20-03 Feedback 2 Source, or
20-06 Feedback 3 Source. Note that each
setpoint reference will be the sum of its
respective parameter value (20-21 Setpoint
1, 20-22 Setpoint 2 and 20-23 Setpoint 3)
and any other references that are enabled
(see parameter group 3-1* References).
20-21 Setpoint 1
Range:
0 [-999999.999 -
ProcessCtrlUnit 999999.999
*
ProcessCtrlUnit]
®
VLT AQUA Drive Programming Guide
Function:
Setpoint 1 is used in
Closed-loop mode to enter
a setpoint reference that is
used by the adjustable
frequency drive's PID
controller. See the
description of
20-20 Feedback Function.
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MG20O622 - VLT is a registered Danfoss trademark
20-21 Setpoint 1
Range:
20-22 Setpoint 2
Range:
0 [-999999.999 -
ProcessCtrlUnit 999999.999
*
ProcessCtrlUnit]
NOTICE!
The setpoint reference entered here is added to any other
references that are enabled (see parameter group 3-1*).
20-23 Setpoint 3
Range:
0 [-999999.999 -
ProcessCtrlUnit 999999.999
*
ProcessCtrlUnit]
Function:
NOTICE!
Setpoint reference
entered here is added to
any other references
that are enabled (see
parameter group 3-1*).
Function:
Setpoint 2 is used in
Closed-loop mode to enter
a setpoint reference that
may be used by the
adjustable frequency
drive's PID controller. See
the description of
Feedback Function,
20-20 Feedback Function.
Function:
Setpoint 3 is used in
Closed-loop mode to enter
a setpoint reference that
may be used by the
adjustable frequency drive's
PID controller. See the
description of
20-20 Feedback Function.
NOTICE!
If the min and max
references are altered, a
new PI - Auto-tune may
be needed.
NOTICE!
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter group 3-1*
References).
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