Operating Mode; Centrifuge Operation Sequence - ABB ACS880 Supplement Manual

16 Centrifuge program features
unloading speed and a discharger removes the product from the basket. An alternative
unloading method allows top removal of product in a filter bag.

Operating mode


Centrifuge operation can be set with parameter
selection. For using the Centrifuge, see steps in

Centrifuge operation sequence


The graph below illustrates the operating sequence of a Centrifuge drive. The
corresponding operating stages are listed in the table below this graph.
1 2 3 4 5
RO1
RO2
RO3
Figure 4. Operation sequence of Centrifuge
The table below lists the different operating stages of Centrifuge drive and points to the
related parameter setting.
Stage Stage description
No.
1 Drive starts accelerating
the Centrifuge to filling
speed.
2 Drive reaches the pre-
washing speed.
3 Counter reaches the set
pre-washing time.
4 Drive reaches the filling
speed.
5 External system stops
the Centrifuge filling.
6 Drive reaches the
washing speed.
6 7 8
Centrifuge operation
Drive starts accelerating the
Centrifuge.
Pre-washing counter starts.
Pre-washing is deactivated.
Drive shifts to constant
speed. The external system
starts filling the Centrifuge.
Drive accelerates the
Centrifuge to spin speed.
Washing counter starts and
Relay output RO2 starts the
washing operation.
74.01 Centrifuge/ Decanter function
Centrifuge drive start-up
9
10
See parameter
77.06 Acc time to fill speed
77.04 Prewashing speed
77.10 Prewashing time
77.01 Fill speed
77.07 Acc time to spin
speed
77.05 Washing speed
(page 8).
11 .
12
time