KSB PumpDrive - 7.2.4.2 Stand-by mode (sleep mode)

NOTE
Parameters
3-8-2-11 and 3-8-3-11 must not both be set to "Q" at the same time.
Table 96: Parameter(s) for dynamic pressure compensation function on a PumpDrive Advanced model using flow
rate measurement via a sensor
Parameter Description Settings
3-9-1-5 Process type of PI controller Variable pressure
3-4-1-1 Q measurement/estimate Measured
3-12-1-1 Q measurement Measured
3-4-1-2 Calibration for Q measurement, Q 100 % value Full-scale value of flow rate sensor
3-4-1-3 Calibration for Q measurement, p 100 % value Full-scale value of pressure/differential pressure
sensor
3-4-2-1 Q compensation point As required by system conditions
3-4-2-2 Setpoint compensation
For connection of the flow rate sensor to analog input 1:
3-8-2-11 AI 1 descriptor Q
For connection of the flow rate sensor to analog input 2
3-8-3-11 AI 2 descriptor Q
7.2.4.2 Stand-by mode (sleep mode)
NOTE
In stand-by (sleep) mode, PumpDrive may start up without any warning if the actual
pressure exceeds the defined hysteresis for closed-loop control mode
(3-4-3-2) .
When the pressure is controlled, PumpDrive will recognise whether the flow rate
supplied is actually used. If there is no demand, PumpDrive will stop at a user-
definable minimum speed and will only restart once the pressure in the accumulator
falls, i.e. when there is actual demand from the system.
1
2
87
6
5
4
3
A
B
C
Fig. 46: Time characteristics of parameters for stand-by (sleep) mode
A Pressure setpoint
B Pressure actual value
C Speed
1 Waiting time until activation
3-4-3-6
2 Duration of test pulse 3-4-3-9
3 Setpoint increase/pulse 3-4-3-8
4 Hysteresis for closed-loop control mode 3-4-3-2
5 Hysteresis for pressure variations 3-4-3-7
6 Minimum speed before stopping 3-4-3-4
7 Waiting time before stopping 3-4-3-5
8 Waiting time before system start-up 3-4-3-3
7 Commissioning/shutdown
PumpDrive
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