Danfoss ADAP-KOOL Drive Programming Manual page 154

3 Parameter Description
the auto-tuned parameters will typically result in very slow control. Excessive feedback sensor noise should be removed using the input filter (parameter
groups 6-**, 5-5* and 26-**, Terminal 53/54 Filter Time Constant/Pulse Filter Time Constant #29/33) before activating PID autotuning. In order to obtain
the most accurate controller parameters, it is advised to carry out PID autotuning, when the application is running in typical operation, i.e. with a typical
load.
20-70 Closed Loop Type
Option:
3
[0] * Auto
[1] Fast Pressure
[2] Slow Pressure
[3] Fast Temperature
[4] Slow Temperature
20-71 PID Performance
Option:
[0] * Normal
[1] Fast
20-72 PID Output Change
Range:
0.10 N/A* [0.01 - 0.50 N/A]
20-73 Minimum Feedback Level
Range:
-999999.00 [-999999.999 - par. 20-74 Proc-
0 Proc- essCtrlUnit]
essCtrlU-
nit*
20-74 Maximum Feedback Level
Range:
999999.000 [par. 20-73 - 999999.999 Proc-
ProcessCtr- essCtrlUnit]
lUnit*
20-79 PID Autotuning
Option:
[0] * Disabled
[1] Enabled
154
Function:
This parameter defines the application response. The default mode should be sufficient for most
applications. If the application response speed is known, it can be selected here. This will decrease
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 autotuning sequence.
Function:
Normal setting of this parameter will be suitable for pressure control in fan systems.
Fast setting would generally be used in pumping systems, where a faster control response is de-
sirable.
Function:
This parameter sets the magnitude of step change during autotuning. The value is a percentage of
full speed. I.e. if maximum output frequency inpar.4-13
Motor Speed High Limit [Hz]
4-14 is set to 50Hz, 0.10 is 10% of 50Hz, which is 5Hz. This parameter
should be set to a value resulting in feedback changes of between 10% and 20% for best tuning
accuracy.
Function:
The minimum allowable feedback level should be entered here in User units as defined in
Reference/Feedback Unit
par. 20-12
autotuning is aborted and an error message will appear on the LCP.
Function:
The maximum allowable feedback level should be entered here in User units as defined in
par. 20-12 Reference/Feedback Unit . If the level rises above par.20-74
autotuning is aborted and an error message will appear on the LCP.
Function:
This parameter starts the PID autotuning sequence. Once the autotuning has successfully completed
and the settings have been accepted or rejected by the user, by pressing [OK] or [Cancel] buttons
on the LCP at the end of tuning, this parameter is reset to [0] Disabled.
MG.11.N1.02 - VLT ® is a registered Danfoss trademark
®
ADAP-KOOL Drive Programming Guide
Motor Speed High Limit [RPM]
Minimum Feedback Level
. If the level falls below par.20-73
Maximum Feedback Level
/par.
,
,