Danfoss VLT AQUA Drive FC 202 Design Guide

Figure 2.13 Active Reference
130BD893.10
open loop
Scale to
RPM or
Hz
Scale to
closed loop
unit
closed loop
Local
ref.
Local
reference
Conguration
mode
P 1-00
Figure 2.14 Conguration Mode
Application control principle
Either the remote reference or the local reference is active
at any time. Both cannot be active simultaneously. Set the
application control principle (that is, open-loop or closed-
loop) in 1-00 Conguration Mode, as shown in Table 2.4.
When the local reference is active, set the application
control principle in 1-05 Local Mode
Conguration.
Set the reference site in 3-13 Reference Site, as shown in
Table 2.4.
For more information, refer to the Programming Guide.
[Hand On]
[Auto On]
LCP Keys
Reference Site
3-13 Reference Site
Active Reference
Hand Linked to Hand/Auto Local
Hand⇒O Linked to Hand/Auto Local
Auto Linked to Hand/Auto Remote
Auto ⇒O Linked to Hand/Auto Remote
All keys Local Local
All keys Remote Remote
Table 2.4 Local and Remote Reference Congurations
2.4.4 Reference Handling
Reference handling is applicable in both open-loop and
closed-loop operation.
Internal and external references
Up to eight internal preset references can be programmed
into the adjustable frequency drive. The active internal
preset reference can be selected externally through digital
control inputs or the serial communications bus.
External references can also be supplied to the drive, most
commonly through an analog control input. All reference
sources and the bus reference are added to produce the
total external reference. The external reference, the preset
reference, the setpoint, or the sum of all three can be
selected as the active reference. This reference can be
scaled.
The scaled reference is calculated as follows:
Reference = X + X × 
Y
100
Where X is the external reference, the preset reference, or
the sum of these references and Y is 3-14 Preset Relative
Reference in [%].
If Y, 3-14 Preset Relative Reference, is set to 0%, the scaling
does not
aect the reference.
Remote reference
A remote reference is comprised of the following (see
Figure 2.15).
•
Preset references
•
External references:
-
Analog inputs
-
Pulse frequency inputs
-
Digital potentiometer inputs
-
Serial communication bus references
•
A preset relative reference
•
A feedback controlled setpoint
Product Overview
Design Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English