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[71]
bar
[72]
Pa
[73]
kPa
[74]
m WG
[75]
mm Hg
[80]
kW
[120]
GPM
[121]
gal/s
[122]
gal/min
[123]
gal/h
[124]
CFM
[125]
ft
3
/s
[126]
ft
3
/min
[127]
ft
3
/h
[130]
lb/s
[131]
lb/min
[132]
lb/h
[140]
ft/s
[141]
ft/min
[145]
ft
[160]
°F
[170]
psi
[171]
lb/in
2
[172]
in WG
[173]
ft WG
[174]
in Hg
[180]
HP
This parameter determines the unit that is used for the setpoint reference and feedback that the
PID Controller will use for controlling the output frequency of the frequency converter.
2.17.3 20-2* Feedback & Setpoint
This parameter group is used to determine how the frequency converter’s PID Controller will use the three possible feedback signals to control the output
frequency of the frequency converter. This group is also used to store the three internal setpoint references.
20-20 Feedback Function
Option:
Function:
[0]
Sum
[1]
Difference
[2]
Average
[3] *
Minimum
[4]
Maximum
[5]
Multi setpoint min
[6]
Multi setpoint max
This parameter determines how the three possible feedbacks will be used to control the output
frequency of the frequency converter.
NB!
Any unused feedback must be set to “No function” in its Feedback Source pa-
rameter: 20-00, 20-03 or 20-06.
VLT
®
AQUA Drive Programming Guide
2 Parameter Description
MG.20.O4.02 - VLT
®
is a registered Danfoss trademark
163
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