Aux. drive 2
Aux. drive 1
f
out
f
max
(par.
ID102)
f
min
(par. ID101)
Start/stop
control of
the AC drive
Minimum of the
actual value
Maximum
of the actual
value
Actual
valve
Stop freq. of the aux.
drive 1 (par. ID1003)
Start freq. of
the aux.
drive 1
(par. ID1002)
Start freq. of
the aux.
drive 2
(par. ID1004)
Stop freq. of the aux.
drive 2 (par. ID1005)
Start
Stop
Start
Stop
Start
Stop
e
3
0
b
h
0
7
5
.1
0
Illustration 85: Example of Variable Speed Drive and Two Auxiliary Drives with Bypassed PID Controller
10.425 (ID 1021) Analog Input Selection for Input Pressure Measurement
Location in the menu:
P2.9.17
(Pump and Fan Control Application)
Use this parameter to select the analog input signal for which to set the input pressure measurement.
10.426 (ID 1022) Input Pressure High Limit
Location in the menu:
P2.9.18
(Pump and Fan Control Application)
Use this parameter to set the high limit for the analog input selected for the input pressure measurement.
10.427 (ID 1023) Input Pressure Low Limit
Location in the menu:
P2.9.19
(Pump and Fan Control Application)
Use this parameter to set the low limit for the analog input selected for the input pressure measurement.
10.428 (ID 1024) Output Pressure Drop
Location in the menu:
P2.9.20
(Pump and Fan Control Application)
Use this parameter to set the decrease in output pressure when the input pressure goes below the input pressure low limit.
In pressure increase stations, decreasing of the output pressure can be needed if the input pressure decreases below a certain limit.
The input pressure measurement which is needed is connected to the analog input selected with parameter
ID 1021
.
AB296635287482en-000301 / DPD00903 | 273
Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Summary of Contents for VACON NX
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