salmson SIE Série Notice De Montage Et De Mise En Service page 57

6.3 Dual pump function
InterFace-Module (IF-Module)
6.3.1 Operating modes
Main/readiness operation
Parallel operation
H
H
max
H
s
s
H
min
(
Fig. 14: Control p-c (parallel operation)
H
H
H
max
H
s
H
min
(
Fig. 15: Control p-v (parallel operation)
Installation and operating instructions SIE - DIE
NOTE
The characteristics described below are only available when the inter-
nal MP interface (MP = multi-pump) is used.
• Both pumps are controlled by the master.
If one of the pumps malfunctions, the other will run according to the
master's control settings.
• The master pump is the left pump in the direction of flow.
Connect the pressure sensor to this pump.
For communication between pumps and the main computer for the
pumps (via LON-BUS, PLR or interface converter), one IF-Module
(accessories) is required per pump. This is plugged into the terminal
space (Fig. 1).
• The Master – Slave communication uses an internal interface (termi-
nal: MP, Fig. 20).
• For use of a main computer for the pumps (PLR)/interface converter
or the LON interface, the master pump must be connected to the PLR
or the LON. Only the master pump needs to be equipped in this case
with a PLR or LON module.
Communication
PLR/Interface converter
LONWORKS network
Each of the two pumps provides the configuration flow rate. The
other pump is available in case of malfunction or runs after pump
cycling. Only one pump runs at a time (see Fig. 10, 11 and 12).
In the partial load range, the hydraulic output is provided at the
beginning by one pump. The second pump will be switched on when
it is most efficient to do this; that is, when the total power consump-
tion P of both pumps in the partial load range is less than the power
1
consumption P
ously adjusted upwards to the maximum speed (Fig. 14 and 15).
In manual control mode, both pumps always run synchronically.
Q
Q
Q
Master
PLR IF-Module
LON IF-Module
of one pump. Both pumps will then be simultane-
1
English
Slave
not necessary
not necessary
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