Danfoss VLT AQUA Drive FC 202 Programming Manual page 140

Parameter Description
20-20 Feedback Function
Option:
3 3
[6] Multi
Setpoint
Max
20-21 Setpoint 1
Range:
0
ProcessCtrlUnit
138
Function:
NOTICE
If only 2 feedback signals are used, the
feedback that is not to be used must be
set to No Function in
parameter 20-00 Feedback 1 Source,
parameter 20-03 Feedback 2 Source, or
parameter 20-06 Feedback 3 Source. Note
that each setpoint reference is the sum of
its respective parameter value and any
other references that are enabled (see
parameter group 3-1* References).
Sets up the PID Controller to calculate the
difference between Feedback 1 and Setpoint 1,
Feedback 2 and Setpoint 2, and Feedback 3 and
Setpoint 3. It uses 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 uses the feedback/setpoint
pair in which the difference between the
feedback and the setpoint reference is the least.
NOTICE
If only 2 feedback signals are used, the
feedback that is not to be used must be
set to No Function in
parameter 20-00 Feedback 1 Source,
parameter 20-03 Feedback 2 Source, or
parameter 20-06 Feedback 3 Source. Note
that each setpoint reference is the sum of
its respective parameter value
(parameter 20-21 Setpoint 1,
parameter 20-22 Setpoint 2 and
20-23 Setpoint 3) and any other references
that are enabled (see parameter group
3-1* References).
Function:
[-999999.999 - Setpoint 1 is used in Closed
999999.999 Loop Mode to enter a
*
ProcessCtrlUnit] setpoint reference that is
used by the frequency
converter's PID Controller. See
the description of
parameter 20-20 Feedback
Function.
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
Programming Guide
20-21 Setpoint 1
Range:
20-22 Setpoint 2
Range:
0
ProcessCtrlUnit
20-23 Setpoint 3
Range:
0
ProcessCtrlUnit
Function:
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter group 3-1*
References).
Function:
[-999999.999 - Setpoint 2 is used in Closed
999999.999 Loop Mode to enter a
*
ProcessCtrlUnit] setpoint reference that may
be used by the frequency
converter's PID Controller. See
the description of Feedback
Function,
parameter 20-20 Feedback
Function.
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter group 3-1*
References).
Function:
[-999999.999 - Setpoint 3 is used in Closed
999999.999 Loop Mode to enter a
*
ProcessCtrlUnit] setpoint reference that may
be used by the frequency
converter's PID Controller. See
the description of
parameter 20-20 Feedback
Function.
NOTICE
If the min and max
references are altered, a
new PI - Autotune may
be needed.
MG20O702