•
•
•
The time count is reset after the autochange has taken place.
See
10.435 (ID 1031) Autochange Frequency Limit
10.434 (ID 1030) Maximum Number of Auxiliary Drives
Location in the menu:
P2.9.27
(Pump and Fan Control Application)
Use this parameter to set the number of auxiliary drives used.
See
10.435 (ID 1031) Autochange Frequency Limit
10.435 (ID 1031) Autochange Frequency Limit
Location in the menu:
P2.9.28
(Pump and Fan Control Application)
Use this parameter to set the autochange frequency limit.
These parameters define the level below which the capacity used must remain so that the autochange can take place.
This level is defined as follows:
If the number of running auxiliary drives is smaller than the value of parameter
ID 1030
, the autochange function can take place.
If the number of running auxiliary drives is equal to the value of parameter
ID 1030
and the frequency of the controlled drive is
below the value of parameter
ID 1031
, the autochange can take place.
If the value of parameter
ID 1031
is 0.0 Hz, the autochange can take place only in rest position (Stop and Sleep) regardless of the
value of parameter
ID 1030
.
t
Autochange moment
f
out
Par. ID1030 = 1
Max.number of
auxiliary drives
Par. ID1029
Autochange interval
Par. ID1029
Autochange interval
Aux. drive
1 control
Aux. drive
2 control
Par. ID1031
Autochange
level,
frequency
e
3
0
b
h
0
7
8
.1
0
Illustration 91: Autochange Interval and Limits
10.436 (ID 1032) Interlock Selection
Location in the menu:
P2.9.23
(Pump and Fan Control Application)
Use this parameter to enable or disable the interlocks.
The interlock feedback signals come from the switches that connect the motors to the automatic control (AC drive), directly to the
mains or place them to off-state. The interlock feedback functions are connected to the digital inputs of the AC drive. Program pa-
rameters
ID 426
to
ID 430
to connect the feedback functions to the digital inputs. Each drive must be connected to its own interlock
input. The Pump and fan control controls only those motors whose interlock input is active.
AB296635287482en-000301 / DPD00903 | 277
Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Summary of Contents for VACON NX
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