Danfoss VLT HVAC Drive FC 102, Руководство по программированию, Страница: 154 / 250

21-00 Closed Loop Type
Option: Function:
This parameter defines the application
response. The default mode should be
sufficient for most applications. If the
relative application speed is known, it
can be selected here. This decreases the
time needed for carrying out PID
autotuning. The setting has no impact on
the value of the tuned parameters and is
used only for the PID autotuning
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 between 10% and 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 defined 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 21-50 Ext. 3 Ref./
Feedback 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 defined 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 21-50 Ext. 3 Ref./
Feedback 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 Autotuning
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 Descriptions
VLT
®
HVAC Drive FC 102
152 Danfoss A/S © 03/2015 All rights reserved. MG11CE02
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