Logikos Pump Control System Manual
Allied Pumps Packaged Water Solutions 10
3 PUMP CONTROL
3.1 NAMES AND PARAMETERS
The control algorithm for pump operation has the following controlling switch parameters which are
stored in EEROM and can be changed in Advanced Programming mode.
If true the objective of the algorithm is to keep the tank level low
(empty)
If true there is only one pump in the system
If true two pumps may operate concurrently
The control algorithms described below uses the following terminology for inputs, output and
internal states.
The two physical pumps are Pump1 and Pump2. At power up Pump1 is the Duty Pump and
Pump2 is the Standby Pump.
Under Pump is true when the High Level is wet and Tank Empty. Under pump is true when
Low Level is dry and Tank Fill.
Level Stop is true if the stop level is dry and the mode is Tank Empty. Level stop is true if
the stop level is wet and the mode is Tank Fill.
Level Duty is true if the duty pump start level is wet and the mode is Tank Empty. Level
Duty is true if the duty pump start level is dry and the mode Tank Fill.
Level Standby is true if the Standby pump start level is wet and the mode is Tank Empty. Level
Standby is true if the Standby pump start level is dry and the mode Tank Fill.
3.2 THE HIGH LEVEL CONTROL ALGORITHM
This control algorithm determines which pumps should be on and off to perform the overall function of
the controller. Turning pumps off when there is a fault and manual pump control is discussed in The
Low Level Control Algorithm and Manual Control.
The following control algorithm is used in One Pump systems.
If LevelStop
If Pump1 is in Auto mode Pump1 is switched off
If Pump2 is in Auto mode Pump2 is switched off
Swapped is reset
