Danfoss VLT FC 102 Programming Manual page 468

Programming Guide | VLT® HVAC Drive FC 102
Data type: Uint8
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.
Option Name
[0*] Auto
[1] Fast pressure
[2] Slow pressure
[3] Fast temperature
[4] Slow temperature
21-01 PID Performance
Default value:
[0] Normal
Setup: 2 setups
Data type: Uint8
Option Name
[0*] Normal
[1] Fast
21-02 PID Output Change
Default value: 0.10
Setup:
2 setups
Data type: Uint16
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
Default value: -999999.999
Setup: 2 setups
Data type:
Int32
Enter the minimum allowable feedback level in user units as defined:
Parameter 21-10 Ext. 1 Ref./Feedback Unit for EXT CL 1.
l
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Change during operation:
Description
Parameter type:
Convertion index:
Change during operation:
Description
Normal setting for this parameter is suitable for pressure control
in fan systems.
Fast setting would generally be used in pumping systems where
a faster control response is desirable.
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter Descriptions
True
Option
–
True
Range, 0.01 - 0.50
-2
True
Range, -999999.999 - par.
21-04
-3
True
AU430028034214en-001901 / 130R0310