Firmware Manual

9000X AF Drives
7-8 For more information visit: www.eaton.com
MN04004001E
August 2010
Pump and Fan Control Application
Pump and fan automatics with interlocks and autochange
The above is also applicable if the autochange function is used. In addition to the changed
and updated start order, also the change order of main drives depends on parameter 1.9.23.
Figure 7-3: Example of the Function of the PFC Application with Three Aux. Drives
Interlock 4
Interlock 3
Interlock 2
Interlock 1
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
Max. Frequency
Aux. 3 Running
Aux. 2 Running
Aux. 1 Running
Main Drive Running
Min. Frequency
f
t
Aux. 1, 2 and 3
Start Frequency
Aux. 1, 2 and 3
Stop Frequency
100%
Main
Drive
Aux. Drive 2
Aux. Drive 3
Aux. Drive 1
M.
D.
Aux.
Drive
2
1
1
3
246 8
57
2
4
8
5
Interlocks
Relay
Control
Main Drive
Output
Frequency
PID Output