Danfoss VLT Series Design Manual page 37

VLT ® HVAC Drive Design Guide
Parameter
Feedback 2 Source
Feedback 3 Source
Feedback 1 Conversion
Feedback 2 Conversion
Feedback 3 Conversion
Feedback 1 Source Unit
Feedback 2 Source Unit
Feedback 3 Source Unit
Feedback Function
Setpoint 1
Setpoint 2
Setpoint 3
Refrigerant
Description of function
par. 20-03 Select the source, if any, for Feedback 2 or 3. This
par. 20-06 is most commonly a drive analog input, but other
sources are also available. Par. 20-20 determines
how multiple feedback signals will be processed by
the drive's closed-loop controller. By default, these
are set to
par. 20-01 These are used to convert the feedback signal from
par. 20-04 one type to another, for example from pressure to
par. 20-07 flow or from pressure to temperature (for com-
pressor applications). If
[2] is selected, the refrigerant must be specified in
par. Group 20-3*, Feedback Adv. Conv. By default,
these are set to
par. 20-02 Select the unit for a feedback source prior to any
par. 20-05 conversions. This is used for display purposes only.
par. 20-08 This parameter is only available when using
sure to Temperature
par. 20-20 When multiple feedbacks or setpoints are used,
this determines how they will be processed by the
drive's closed-loop controller.
par. 20-21 These setpoints can be used to provide a setpoint
par. 20-22 reference to the drive's closed-loop controller. Par.
par. 20-23 20-20 determines how multiple setpoint references
will be processed. Any other references that are
activated in par. group 3-1* will add to these val-
ues.
par. 20-30 If any feedback conversion (par. 20-01, 20-04 or
20-07) is set to
refrigerant type must be selected here. If the re-
frigerant used is not listed here, select
fined
refrigerant in par. 20-31, 20-32 and 20-33.
MG.11.B4.22 - VLT ® is a registered Danfoss trademark.
2. Introduction to the VLT HVAC Drive
No function
[0].
Pressure to temperature
Linear
[0].
feedback conversion.
Pressure to Temperature
[7] and specify the characteristics of the
2
Pres-
[2], the
User de-
37