salmson SIE Installation Et Mise En Service page 69

H
H
H
max
H
s
½ H
s
H
min
Fig. 11: Δp-v control
H
H
n
max
H
s
s
n
min
Fig. 12: Manual control mode
Installation and operating instructions SIE-DIE-PBE
Δp-v:
The electronics change the differential pressure setpoint to be main-
tained by the pump linearly between the delivery head H
The differential pressure setpoint H
volume flow (Fig. 11).
NOTE
Δp-v control on monobloc pumps can result in differing amounts of
Q deviation in relation to the optimum linear progression between the
Q
delivery head Hs and ½ Hs. The deviation depends on the respective
pump type and on the positioning of the sensors in the different appli-
cations.
Q = Volume flow
H = Differential pressure (min./max.)
H = Differential pressure setpoint
S
NOTE
For further information about setting the control mode and the asso-
ciated parameters, see Section 8 "Operation" on page 75 and Section
9.4 "Setting the control mode" on page 91.
Manual control mode:
The speed of the pump can be kept to a constant speed between n
and n (Fig. 12). "Manual control" mode deactivates all other con-
max
trol modes.
PID controller
If the aforementioned standard control modes cannot be used – e.g.if
Q
Q
other sensors are to be used or the distance to the pump is very long
– then the PID control (Proportional-Integral-Differential control) is
available.
By selecting a good combination of individual control portions, the
operator can ensure fast reacting, constant control without lasting
setpoint deviations.
The output signal of the selected sensor can adopt any intermediate
value. The respective actual value reached (sensor signal) will be
shown as a percent (100 % = maximum measurement range of the
sensor) on the status page of the menu.
NOTE
The displayed percent value only corresponds indirectly to the current
delivery head of the pump(s). It can be, for example, that the maxi-
mum delivery head has already been reached at a sensor signal
< 100 %.
For further information about setting the control mode and the asso-
ciated parameters, see Section 8 "Operation" on page 75 and Section
9.4 "Setting the control mode" on page 91.
English
and ½ H
s
decreases/increases with the
s
.
s
min
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