NB!
If a feedback is not used, its source must be set to
No Function
[0]. par.20-20
determines how the three possible
feedbacks will be used by the PID Controller.
20-01 Feedback 1 Conversion
This parameter allows a conversion function to be applied to Feedback 1.
Option:
Function:
[0]
Linear
Linear
[0] has no effect on the feedback.
[1]
Square root
Square root
[1] is commonly used when a pressure sensor is used to provide flow feedback
(
(
flow
∝
pressure
)
).
[2] *
Pressure to temperature
Pressure to temperature
[2] is used in compressor applications to provide temperature feedback
using a pressure sensor. The temperature of the refrigerant is calculated using the following for-
mula:
Temperature
=
A
2
(
ln
(
Pe
+ 1)
−
A
1)
−
A
3
, where A1, A2 and A3 are refrigerant-specific con-
stants. The refrigerant must be selected in parameter 20-30. Parameters 20-31 through 20-33 allow
the values of A1, A2 and A3 to be entered for a refrigerant that is not listed in parameter 20-30.
20-02 Feedback 1 Source Unit
This parameter determines the unit that is used for this Feedback Source, prior to applying the feedback conversion of
par. 20-01, Feedback 1
Conversion
. This unit is not used by the PID Controller. It is used only for display and monitoring purposes.
Option:
Function:
[70]
mbar
[71] *
bar
[72]
Pa
[73]
kPa
[74]
m WG
[170]
psi
[171]
lb/in
2
[172]
in WG
[173]
ft WG
NB!
This parameter is only available when using Pressure to Temperature Feedback Conversion.
3 Parameter Description
ADAP-KOOL
®
Drive Programming Guide
146
MG.11.N1.02 - VLT
®
is a registered Danfoss trademark
3
Содержание ADAP-KOOL Drive
Страница 14: ...2 How to Programme ADAP KOOL Drive Programming Guide 14 MG 11 N1 02 VLT is a registered Danfoss trademark 2...
Страница 201: ...ADAP KOOL Drive Programming Guide 3 Parameter Description MG 11 N1 02 VLT is a registered Danfoss trademark 201 3...
Страница 222: ...4 Parameter Lists ADAP KOOL Drive Programming Guide 222 MG 11 N1 02 VLT is a registered Danfoss trademark 4...