The "relays/controls" menu
95
!
Note!
If several pumps are allocated to a pump control, the switching direction of all these pumps must
be the same. Mixing of "filling" and "emptying" is not allowed.
The difference between "limit simple" and "limit parallel" relates to the control of more than one
pump:
• limit simple (A)
With this function, only one pump can be running at a time. Before a pump is switched on, the
previously running pump is switched off automatically. Details depend on the relative position of
the switching points, especially on the fact if the switching ranges of different pumps are
overlapping. (Refer to the example in the diagram below).
• limit parallel (B)
With this function, several pumps can be switched on at the same time.
Example ("Emptying" with three pumps)
L00-FMU90xxx-19-00-00-yy-107
A: "limit simple"; B: "limit parallel"
1: Separated switching ranges; 2: Overlapping switching ranges;
P1
on
, P2
on
, P3
on
: switch-on points for the pumps P1, P2 and P3
P1
off
, P2
off
, P3
off
: switch-off points for the pumps P1, P2 and P3
P2
t
t
L
P3
off
P3
on
P2
off
P2
on
P1
off
P1
on
P1
t
P3
t
t
t
t
on
on
on
off
off
off
P2
t
t
L
P3
off,
P2 P1
off, off
P3
on
P2
on
P1
on
P1
t
P3
t
t
t
t
on
on
on
off
off
off
A
B
P2
P1
P3
on
on
on
off
off
off
P2
P1
P3
on
on
on
12
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