Danfoss VLT AQUA Drive FC 202 Programming Guide

21-00 Closed Loop Type
Option: Function:
This parameter denes the application
response. The default mode should be
sucient for most applications. If the
relative application speed is known, it
can be selected here. This decreases the
time needed for carrying out PID auto-
tuning. The setting has no impact on the
value of the tuned parameters and is
used only for the PID auto-tuning
sequence.
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast
Temperature
[4] Slow
Temperature
21-01 PID Performance
Option: Function:
[0] * Normal Normal setting of this parameter is suitable for
pressure control in fan systems.
[1] Fast Fast setting would generally be used in pumping
systems, where a faster control response is
desirable.
21-02 PID Output Change
Range: Function:
0.10* [0.01 -
0.50 ]
This parameter sets the magnitude of step
change during auto tuning. The value is a
percentage of full operating range. That is, if
the maximum analog output voltage is set to
10 V, 0.10 is 10% of 10 V, which is 1 V. Set this
parameter to a value resulting in feedback
changes of 10–20% for best tuning accuracy.
21-03 Minimum Feedback Level
Range: Function:
-999999*
[ -999999.999
- par. 21-04 ]
Enter the minimum allowable feedback
level in user units as dened in:
•
Parameter 21-10 Ext. 1 Ref./
Feedback Unit for EXT CL 1.
•
Parameter 21-30 Ext. 2 Ref./
Feedback Unit for EXT CL 2.
•
Parameter 20-05 Feedback 2
Source Unit for EXT CL 3.
If the level drops below
parameter 21-03 Minimum Feedback
Level, PID auto-tuning is aborted, and
an error message appears in the
display.
21-04 Maximum Feedback Level
Range: Function:
999999* [ par.
21-03 -
999999.999
]
Enter the maximum allowable feedback
level in user units as dened in:
•
Parameter 21-10 Ext. 1 Ref./
Feedback Unit for EXT CL 1.
•
Parameter 21-30 Ext. 2 Ref./
Feedback Unit for EXT CL 2.
•
Parameter 20-05 Feedback 2
Source Unit for EXT CL 3.
If the level rises above
parameter 21-04 Maximum Feedback Level,
PID auto tuning is aborted, and an error
message appears in the display.
21-09 PID Auto Tuning
Option: Function:
This parameter enables selection of the
extended PID controller to be auto-tuned
and starts the PID auto-tuning for that
controller. Once the auto-tuning has
successfully completed and the settings
have been accepted or rejected by
pressing [OK] or [Cancel] at the end of
tuning, this parameter is reset to [0]
Disabled.
[0] * Disabled
[1] Enabled Ext CL1
PID
[2] Enabled Ext CL 2
PID
[3] Enabled Ext CL 3
PID
Parameter Description
VLT
®
AQUA Drive FC 202
170 Danfoss A/S © 05/2018 All rights reserved. MG20OB02
33

Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English