The "relays/controls" menu
96
Function "pump rate control"
If pump rate control has been selected, there is only one switch-on point and one switch-off point,
which are valid for all relays. Additionally, a desired pump rate has to be specified.
If the level rises above (or falls below) the switch-on point, initially only one pump is switched on.
If the desired pump rate has not been achieved after the selected hook-up interval, an additional
pump is switched on. Similarly, further pumps are switched on in intervals until the desired pump
rate has been achieved.
However, if the level is already near to the switch-off point (distance < switch-on barrier), no
further pumps are swtiched on, even if the pump rate has not yet been achieved.
L00-FMU90xxx-19-00-00-yy-054
A: switch-on point; B: switch-off point; C: pump on; D: pump off; E: hook-up interval; F: switch-on barrier
G: pump rate
Alternating pump control
Optionally, a number of pumps can be allocated to the alternating pump control. In this mode, the
switching points are no longer allocated to the individual pumps. Instead, a desired degree of use
must be defined for each pump (e.g. equal usage of all pumps).
If the level rises above (or falls below) the switch-on point and a pump has to be switched on, the
Prosonic S selects the pump according to an algorithm which ensures that in the course of time the
desired degrees of use are obtained for all pumps.
The same is valid for the switching-off of pumps.
!
Note!
For the limit control (simple or parallel) it can be defined for each pump individually if it is to take
part in the alternating pump control.
For pump rate control, it is only possible to allocate all pumps or no pump to the alternating pump
control.
P1
P1+P2
P1 P2 P3
P1
P2 P3
0
t
t
t
min
min
L
A
B
C
D
E
E
F
G
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