Danfoss VLT FC 102 Programming Manual page 462

Programming Guide | VLT® HVAC Drive FC 102
Select the application response speed if it is known. The default setting is sufficient for most applications. A more precise value decreases
the time needed for carrying out PID adaptation. The setting has no impact on values of parameters and only affects the auto-tuning
speed.
Option Name
[0]* Auto
[1] Fast pressure
[2] Slow pressure
[3] Fast temperature
[4] Slow temperature
20-71 PID Performance
Default value: [0] Normal
Setup: All setups
Data type:
Uint8
Select the application response speed if it is known. The default setting is sufficient for most applications. A more precise value decreases
the time needed for carrying out PID adaptation. The setting has no impact on values of parameters and only affects the auto-tuning
speed.
Option Name
[0]* Normal
[1] Fast
20-72 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 speed. That is, if maximum output
frequency in parameter 4-13 Motor Speed High Limit [RPM]/parameter 4-14 Motor Speed High Limit [Hz] is set to 40 Hz, 0.10 is 10% of
50 Hz, which is 5 Hz. Set this parameter to a value resulting in feedback changes of 10–20% for best tuning accuracy.
20-73 Minimum Feedback Level
Default value: -999999 ProcessCtrlUnit
Setup: 2 setups
Data type: Int32
462 | © 2024.10
Description
Takes 30–120 s to complete.
Takes 10–60 s to complete.
Takes 30–120 s to complete
Takes 10–20 minutes to complete.
Takes 30–60 minutes to complete.
Parameter type:
Conversion index:
Change during operation:
Description
Normal setting of this parameter is suitable for pressure control
in fan systems.
Fast setting is used in pumping systems where a faster control
response is wanted.
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter Descriptions
Option
–
True
Range, 0.01 - 0.5
-2
True
Range, -999999.999 -
999999.999 ProcessCtrlUnit
-2
True
AU430028034214en-001901 / 130R0310