Reference Handling - Danfoss VLT AutomationDrive Design Manual

Introduction to FC 300

3.3 Reference Handling

Local Reference
The local reference is active when the frequency converter is operated with 'Hand On' button active. Adjust the reference by
up/down and left/right arrows respectively.
Remote Reference
The reference handling system for calculating the Remote reference is shown in Illustration 3.3.
No function
Analog ref.
Pulse ref.
Local bus ref.
DigiPot
P 3-14
Preset relative ref.
(0)
(1)
(2)
(3)
(4)
(5)
(6)
(7)
No function
Analog ref.
Pulse ref.
Local bus ref.
DigiPot
No function
Analog ref.
Pulse ref.
Local bus ref.
DigiPot
No function
Analog ref.
Pulse ref.
Local bus ref.
DigiPot
Illustration 3.3 Remote reference
FC 300 Design Guide
P 5-1x(28)/P 5-1x(29)
Input command:
Catch up/ slow down
Y
Relative
P 3-04
X+X*Y
(0)
X
/100
(1)
D1
P 5-1x(15)
Preset '1'
External '0'
200%
-200%
®
MG.33.BD.02 - VLT is a registered Danfoss trademark
P 3-00
Ref./feedback range
P 5-1x(19)/P 5-1x(20)
Freeze ref./Freeze output
-max ref./
+max ref.
100%
-100%
Catch up/
slow
down
max ref.
%
P 3-12
Catchup Slowdown
value
%
min ref.
±100%
Freeze ref.
&
increase/
decrease
ref.
P 5-1x(21)/P 5-1x(22)
Speed up/ speed down
P 1-00
Con guration mode
Speed
open/closed loop
Scale to
RPM or
Hz
Torque
P 16-01
Remote
ref.
Scale to
Nm
Process
Scale to
process
unit
P 16-02
Ref. in %
23
3 3