Danfoss VLT HVAC Basic Drive FC 101

2.7.7 Reference Handling
Details for Open-loop and Closed-loop Operation
Speed open
loop
Configuration
mode
Input command:
freeze reference
Process
control
Scale to
Hz
Scale to
process
unit
Remote
reference/
setpoint
±200%
Feedback
handling
Remote
reference in %
maxRefPCT
minRefPct
min-max ref
Freeze
reference &
increase/
decrease
reference
±100%
Input commands:
Speed up/speed down
±200%
Relative
reference
=
X+X*Y/100
±200%
External reference in %
±200%
Parameter choise:
Reference resource 1,2,3
±100%
Preset reference
Input command:
preset ref bit0, bit1, bit2
+
+
Relative scalling reference
Intern resource
Preset relative reference
±100%
Preset reference 0 ±100%
Preset reference 1 ±100%
Preset reference 2 ±100%
Preset reference 3 ±100%
Preset reference 4 ±100%
Preset reference 5 ±100%
Preset reference 6 ±100%
Preset reference 7 ±100%
Extern resource 1
No function
Analog reference
±200 %
Local bus reference
±200 %
LCP potmeter 0~100 %
Extern resource 2
No function
Analog reference
±200 %
Local bus reference
±200 %
LCP potmeter 0~100 %
Extern resource 3
No function
Analog reference
±200 %
Local bus reference
±200 %
LCP potmeter 0~100 %
Y
X
130BB900.13
Figure 2.21 Block Diagram Showing Remote Reference
Product Overview Design Guide
MG18C522 Danfoss A/S © Rev. 2014-01-14 All rights reserved. 29
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