ABB ACS880 Series, Инструкция к добавке

Страница: 20 / 50

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 74.01 Centrifuge/ Decanter function
selection . For using the Centrifuge, see steps in Centrifuge drive start-up ( page 8 ).

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.
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
No. Stage description Centrifuge operation See parameter
1 Drive starts accelerating
the Centrifuge to filling
speed. Drive starts accelerating the
Centrifuge. 77.06 Acc time to fill speed
2 Drive reaches the pre-
washing speed. Pre-washing counter starts. 77.04 Prewashing speed
3 Counter reaches the set
pre-washing time. Pre-washing is deactivated. 77.10 Prewashing time
4 Drive reaches the filling
speed. Drive shifts to constant
speed. The external system
starts filling the Centrifuge. 77.01 Fill speed
5 External system stops
the Centrifuge filling. Drive accelerates the
Centrifuge to spin speed. 77.07 Acc time to spin
speed
6 Drive reaches the
washing speed. Washing counter starts and
Relay output RO2 starts the
washing operation. 77.05 Washing speed
sp
ee
d
time
2 1 3 4 5 6 7 8
9
10 11
12
.
RO3
RO2
RO1