Danfoss VLT HVAC Basic Drive FC 101 Programming Guide

3.14 Main Menu - FC Closed Loop - Group
20
This parameter group is used for conguring the closed-
loop PI controller that controls the output frequency of the
frequency converter.
3.14.1 20-0* Feedback
This parameter group is used to congure the feedback
signal for the closed-loop PI control of the frequency
converter.
20-00 Feedback 1 Source
Option: Function:
This parameter denes which input is
used as the source of the feedback
signal.
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[100] Bus Feedback 1
[101] Bus Feedback 2
[104] Sensorless Flow
[105] Sensorless Pressure
20-01 Feedback 1 Conversion
Option: Function:
This parameter allows a conversion function to
be applied to feedback 1.
[0] * Linear [0] Linear has no eect on the feedback.
[1] Square
root
[1] Square root is commonly used when a
pressure sensor is used to provide ow
feedback.
(( flow ∝ pressure)).
20-03 Feedback 2 Source
Option: Function:
[0] * No function
[1] Analog Input 53
[2] Analog Input 54
[3] Pulse input 29
[100] Bus Feedback 1
[101] Bus Feedback 2
20-04 Feedback 2 Conversion
Option: Function:
[0] * Linear
[1] Square root
20-12 Reference/Feedback Unit
Option: Function:
Select the unit to be used with
references and feedbacks for closed
loop.
[0] * None Expressionlimit
[20] l/s
[23] m3/s
[24] m3/min
[25] m3/h
[71] bar
[73] kPa
[74] m Wg
[75] mm Hg
[120] GPM
[121] gal/s
[122] gal/min
[123] gal/h
[124] CFM
[125]
ft
3
/s
[126]
ft
3
/min
[170] psi
[171] lb/in2
[172] in WG
[173] ft WG
[174] in Hg
3.14.2 20-2* Feedback/Setpoint
Parameter group for feedback function and setpoints.
Select which setpoint and feedback to use. The setpoint
and feedback can be a xed pair or selected separately
based on logic comparisons.
20-20 Feedback Function
Select how the feedback should be calculated. The feedback can
be either a single feedback source or a combination of several
feedbacks.
Option: Function:
[0] Sum
[1] Dierence
[2] Average
[3] * Minimum
[4] Maximum
Parameters Programming Guide
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Danfoss VLT HVAC Basic Drive FC 101 Specifications

General

Brand	Danfoss
Model	VLT HVAC Basic Drive FC 101
Category	DC Drives
Language	English