Danfoss VLT AQUA FC 202 - Page 160

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Remote reference
Local reference
(Auto On)
(Hand On)
Linked to hand/auto
Local
Remote
Reference
e30ba245.12
LCP keys:
(Hand On), (Off),
and (Auto On)
P 3-13 Reference Site
Illustration 85: Selecting Active Reference
Remote handling of references applies to both open-loop and closed-loop operation. Up to 8 internal preset references can be pro-
grammed into the drive. The active internal preset reference can be selected externally through digital control inputs or through the
serial communication bus.
External references can also be supplied to the drive, most commonly through an analog control input. All reference sources and the
bus references are added to produce the total external reference. The active reference can be selected from the following:
External reference.
Preset reference.
Setpoint.
Sum of the external reference, preset reference, and setpoint.
The active reference can be scaled. The scaled reference is calculated as follows:
Reference = X + X × 
Y
100
X is the external reference, the preset reference, or the sum of these references, and Y is the internal preset relative reference I %. If Y,
parameter 3-14 Preset Relative Reference is set to 0%, the scaling does not aect the reference.
AJ300847815559en-000101 / 130R0337160 | Danfoss A/S © 2020.09
Basic Operating Principles
VLT® AQUA Drive FC 202
Design Guide