| Model DP control panels | |||
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| The Model DP control panels are PLC-based (Programmable Logic Controller) subsurface drip panels which control one single phase (120V or 230V) pump and two valves (flush and spin valves) for drip irrigation systems. The PLC can be programmed to contain all timer settings and monitoring information for the system via a touch pad and screen displays. Each panel features these PLC log functions: pump elapsed time meter, pump cycle counter, pump fail counter, high alarm counter, and override float counter. Panel Operation Four (4) float switches (low level float, timer on float, override float, and high level float) control the operation. Timers internal to the PLC control the pump dosing cycles. When the liquid level reaches the timer on float, the following operations occur: 1. The pump will turn on and the spin filter valve will be activated for the user-programmed length of time. 2. The spin filter valve will then close and the pump will continue to run for the user-programmed timer on or override timer on time. 3. The pump will continue to run and the flush valve will be activated for the user-programmed length of time. 4. The pump will then be turned off and the flush valve will remain on for the user-programmed drain time. 5. The flush valve will then close for the user-programmed off time. After the user-programmed number of cycles, the flush valve will remain activated during a dose for each zone. This will occur until each zone has been fully activated. | |||
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