KSB BoosterControl Advanced - Automatic Setpoint Reduction in Case of Inlet Pressure Drop (ASR); Configuring the Functional Check Run; Dynamic Pressure Compensation (DFS)

8 Commissioning/Start-up/Shutdown
52 of 88
BoosterControl Advanced
8.5.8 Automatic setpoint reduction in case of inlet pressure drop (ASR)
A drop in inlet pressure below a set threshold value immediately causes the
discharge-side setpoint to be reduced. The reduction is maintained until the suction-
side inlet pressure has reached an appropriate threshold value again. A
corresponding warning is output. If the inlet pressure drops below the switch-off
point specified in 3-4-1-5-4, the system stops.
Log in to BoosterControl Advanced at service or factory access level.
(ðSection6.6,Page31)
Table50: Automatic setpoint reduction (dynamic inlet pressure monitoring)
Parameter Description Default Possible values
3-4-1-5-1 Automatic setpoint reduction in case
of inlet pressure drop
0 Off, On
3-4-1-5-2 Re-start point 200 100.. 400
3-4-1-5-3 Enter minimum inlet pressure setpoint 100 0.. 400
3-4-1-5-4 Switch-off point 90 0.. 100
3-4-1-5-5 Proportional constant of PID
controller
3 0.. 10
3-4-1-5-6 Integral constant of PID controller 1 0.. 60
3-4-1-5-7 Differential constant of PID controller 0 0.. 99,99
3-4-1-5-9 Time to pump start 5 0.. 60
3-4-1-5-10 Time to pump stop 5 0.. 60
8.5.9 Configuring the functional check run
To prevent the pumps from seizing up after prolonged idle periods, BoosterControl
Advanced can briefly start up and stop the pumps that did not run in the last interval
at defined intervals. The associated start levels need not be attained.
There are 3 options for functional check run parameterisation:
▪ Interval (periodic)
▪ Fixed time (date)
▪ External signal
For external configuration, a signal is transmitted to inputs WSD1 to WSD3 (J 401) as
required. This must then be parameterised in the control system.
Log in to BoosterControl Advanced at service or factory access level.
(ðSection6.6,Page31)
Table51: Functional check run
Parameter Description Possible values
3-7-3 Enable/disable functional check and set the time of
day
Off
Digital input
Interval
Day-based
Week-based
3-7-4 Interval after which the functional check run is to be
carried out
0 ... 1000000 s
3-7-5 Time when the functional check run is to be carried
out is only displayed if 3-7-3 is set to "Day-based"
-
3-7-6 Day and time when the functional check run is to be
carried out are only displayed if 3-7-3 is set to
"Week-based"
-
3-7-7 Duration of functional check run 0 ... 999 s
8.5.10 Dynamic pressure compensation (DFS)
For physical reasons, the piping loss increases quadratically to the increasing flow
rate.