SLX9000 Adjustable Frequency Drives User Manual
MN04003020E
For more information visit:
www.eaton.com
9-41
January 2009
Parameter 2.10.5/ID1029, Autochange interval
After expiration of the time defined with this parameter, the autochange function takes place
if the capacity used lies below the level defined with parameters 2.10.7 (Autochange
frequency limit) and 2.10.6 (Maximum number of auxiliary drives). Should the capacity
exceed the value of par 2.10.7, the autochange will not take place before the capacity goes
below this limit.
●
The time count is activated only if the Start/Stop request is active.
●
The time count is reset after the autochange has taken place or on removal of Start
request
Parameters 2.10.6/ID1030, Maximum number of auxiliary drives and 2.10.7/ID1031, 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 2.10.6,
the autochange function can take place.
●
If the number of running auxiliary drives is equal to the value of parameter 2.10.6 and
the frequency of the controlled drive is below the value of parameter 2.10.7, the
autochange can take place.
●
If the value of parameter 2.10.7 is 0.0 Hz, the autochange can take place only in rest
position (Stop and Sleep), regardless of the value of parameter 2.10.6.
Examples
PFC with interlocks and autochange between 3 pumps (OPT-AA or OPT-B5 option board
required)
Situation: 1 controlled drive and 2 auxiliary drives.
Parameter settings: 2.10.1 = 2
Interlock feedback signals used, autochange between all drives used.
Parameter settings: 2.10.4 = 4
DIN4 active (par. 2.2.6 = 0)
The interlock feedback signals come from the digital inputs DIN4 (AI1), DIN2 & DIN3 selected
with parameters 2.1.17, 2.1.18 and 2.2.4.
The control of pump 1 (par. 2.3.1 = 17) is enabled through Interlock 1 (DIN2, 2.1.17 = 10), the
control of pump 2 (par. 2.3.2 = 18) through Interlock 2 (DIN3, par. 2.1.18 = 13) and the control
of pump 3 (par. 2.3.3 = 19) through Interlock 3 (DIN4).
Содержание Cutler-Hammer SLX9000 Series
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