Vacon NX series - Page 344

Aux. drive 2
Aux. drive 1
f
out
f
max
(par.
ID102)
f
min
(par. ID101)
Start/stop
control of
the freq.
converter
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
Fig. 82: Example of variable speed drive and two auxiliary drives with bypassed PID controller
1021 ANALOGUE INPUT SELECTION FOR INPUT PRESSURE MEASUREMENT 7 (2.9.17)
1022 INPUT PRESSURE HIGH LIMIT 7 (2.9.18)
1023 INPUT PRESSURE LOW LIMIT 7 (2.9.19)
1024 OUTPUT PRESSURE DROP VALUE 7 (2.9.20)
In pressure increase stations there may be need for decreasing the output pressure if the
input pressure decreases below a certain limit. The input pressure measurement which is
needed is connected to the analogue input selected with parameter ID1021.
VACON · 344 PARAMETER DESCRIPTIONS
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