Specifications

monitoring and control purposes. The PLC shall contain two communication ports for monitoring and

programming purposes. The PLC shall contain an EEPROM, battery backed RAM and non-volatile memory for

storage of critical configuration data.

5.7 ALARMS

Controls shall shut down the pump station in the event of the following alarm conditions. The controls shall

attempt to restart the system after alarm shutdown or loss of power to minimize loss of irrigation. After a user

adjustable number of attempts to re-pressurize the system, the controls will go into hard shut down and remain

there until manually reset.

1. Low discharge pressure cutout. Pressure remains 20 PSI below regulated set point for a set

time delay.

2. High discharge pressure cutout. Pressure remains 11 PSI above regulated set point for set

time delay.

3. Phase / voltage cutout; High or low voltage; loss of phase or phase reversal.

4. High pump volute temperature cutout. Pump temperature stays above 120 degrees F. for

a set time delay.

5. Starter fail cutout. Output to starter is not met with corresponding running input for set time

delay. Indicates overload, phase imbalance or control fuse.

5.8 Operator Interface

Operator interface shall be a full color TFT active matrix LCD display unit mounted in the enclosure door.

Operator interface shall be used for logical display of all pump station functions. The operator interface

shall be NEMA 4 rated. The operator interface shall be touch sensitive with intuitive on-screen user

instruction for ease of operator use. The use of buttons or keys or off-screen user instructions shall not be

permitted. The operator interface shall be LCD color display type with no less than 240 x 320 pixel

resolution, with viewing area measuring not less than 5.7" diagonal. User memory for storing critical pump

operation data shall not be less than required for up to 1 year of data.

The operator interface shall allow the user to view and modify all pertinent operation parameters. The

operator interface shall incorporate password protection for modification of critical pump station

parameters. The operator interface capabilities shall include but are not limited to the

following:

a Overview screen showing pump system configuration. Screen shall show if

each individual pump is enable or disabled, the number of hours on each

pump, station full flow and pressure design criteria

b. System screen with information on current regulation pressure, setpoint, regulation

pressure, System status, restarts remaining, VFD reference speed, pressure regulation

method (VFD or EBV modes) and adjust settings button. Adjust settings button will allow

changing parameters etc after entering password.

c. Settings menu to allow changes to pressure regulation settings, pipe

saver mode, VFD manual mode, analog calibration, flow calibration,

program or register settings.

d. Flow screen will display pressure in PSI, flow in GPM and total gallons

pumped in thousands of gallons. Separate display for total gallons pumped

since last reset.