Parameters: 20-** Fc Closed Loop - Danfoss VLT Refrigeration Drive FC 103 Programming Manual

Parameter Description

3.16 Parameters: 20-** FC Closed Loop

This parameter group is used for configuring the closed-loop PID controller that controls the output frequency of the
frequency converter.
3.16.1 20-0* Feedback
This parameter group is used to configure the feedback signal for the frequency converter's closed-loop PID controller.
Whether the frequency converter is in closed-loop mode or open-loop mode, the feedback signals can also be shown on
the frequency converter's display, be used to control a frequency converter analog output, and be transmitted over various
serial communication protocols.
Setpoint 1
P 20-21
Setpoint 2
P 20-22
Setpoint 3
P 20-23
Feedback conv.
Feedback 1 Source
P 20-01
P 20-00
Feedback conv.
Feedback 2 Source
P 20-04
P 20-03
Feedback conv.
Feedback 3 Source
P 20-07
P 20-06
Illustration 3.46 Feedback
20-00 Feedback 1 Source
Option: Function:
NOTICE
If feedback is not used, set its
source to [0] No Function.
Parameter 20-20 Feedback Function
determines how the PID controller
uses the 3 possible feedbacks.
Up to 3 different feedback signals can
be used to provide the feedback signal
for the frequency converter's PID
controller.
This parameter defines which input is
used as the source of the first feedback
signal.
MG16H202
Programming Guide
Multi setpoint min.
Multi setpoint max.
Feedback 1 Feedback 1 only
Feedback 2 only
Feedback 3 only
Sum (1+2+3)
Feedback 2
Di erence (1-2)
Average (1+2+3)
Minimum (1|2|3)
Maximum (1|2|3)
Feedback 3
20-00 Feedback 1 Source
Option:
[0]
[1]
[2]
[3]
[4]
[7]
[8]
[9]
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0%
0%
0%
0%
Feedback Function
P 20-20
Function:
Analog input X30/11 and analog input
X30/12 refer to inputs on VLT
Purpose I/O MCB 101.
No function
Analog Input 53
Analog Input 54
*
Pulse input 29
Pulse input 33
Analog Input
X30/11
Analog Input
X30/12
Analog Input
X42/1
3 3
Setpoint to
Reference
Handling
Feedback
®
General
127