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# RW PUMP CONTROL STATE AND FUNCTION DESCRIPTIONS
RESERVOIR FLOW FUNCTION
Pumps water to the upper reservoir based on a flow rate set point and a select pump. Pump 1 is the pump selected for normal operation. To operate Pump 2 or 3 as Reservoir flow, manual valves will need to be changed.
WAIT FOR PUMP SELECTION AND ENABLE BIT FROM SCADA
STATE 1 - A PUMP HAS BEEN SELECTED
STATE 2 - FLOW PROCESS ENABLED BY SCADA
PUMP SELECTED AND PROCESS ENABLED
STATE 3 - OPEN RESERVOIR VALVE
SEND CMD TO RESERVOIR VALVE FUNCTION TO OPEN
RCV BIT THAT RESERVOIR VALVE IS OPEN TO THE SET POINT
STATE 4 - RESERVOIR VALVE IS OPEN
STATE 3 RESET
SEND CALL TO THE SELECT PUMP
STATE 5 - PUMP IS CALLED
VERIFY THE SELECT PUMP IS RUNNING
TANK LEVEL CONTROL MODE
THEORY- ADJUST THE FLOW CONTROL SETPOINT TO THE RESERVOIR TO MAINTAIN A WORKING LEVEL OF WATER IN THE RW TANKS.
MINIMUM FLOW RATE
TANK LEVEL SETPOINT
RETAIN MANUAL FLOW RATE SETPOINT ADJUSTMENT
MANUAL / AUTO MODE SELECTION
DEADBAND
IF LEVEL > SETPOINT + DEADBAND, START PUMP
ADJUST PUMP FLOW SETPOINT VIA PID
IF FLOW = MINIMUM FOR X TIME, ENABLE PUMP SLEEP MODE
RESET SLEEP MODE WHEN LEVEL > SETPOINT + DEADBAND OR PROCESS IS TURNED OFF
IN MANUAL FLOW CONTROL, RES PID SETPOINT FROM SCADA
IN AUTO FLOW CONTROL, RES PID SETPOINT FROM TANK PID OUT