www.aurorapump.com
Model 7710
LOCAL PROGRAMMING TO PRIMARY PLC CONTROLLER
1. Primary PLC Controller Defined
The primary PLC controller consists of a programmable logic controller to handle staging of pumps, timers, logic and
alarms. All personal access to the PLC is through an HMI module. The HMI (Human Machine Interface) module
consists of a touch screen with access to all information about the system and performance settings.
There are three control systems for the primary PLC controller:
1. The Basic Control System uses an HMI that is the Magelis XBT GT 3.8 inch backlit monochrome LCD
display, with touch sensitive resistive film, and real time clock. Communication with the variable frequency
drives is through a RS 485 port using Modbus. This magelis offers 8 Mb EPROM flash memory.
2. The Advanced Control System has an HMI, which is a Magelis XBT GT2220 5.7 inch backlit LCD display
with 4096 colors.
3. The Enhanced Control System with Ethernet interface. Additional features:
2. Start-up
Turn on the primary PLC controller by a switch on the front of the panel. The panel has an audible alarm system,
which will indicate the alarm that the drives are not active. Use the touch screen silence button to silence the audible
alarm. The Basic PLC Controller has a 3.8” monochrome screen with tables but with no pictorial graphics as is seen
with the advanced color screen. The menu should indicate a “Start Up Screen” which has a series of pressure set-
tings etc., which need to be input based on local conditions. NOTE: Some of the screen indicators must be touched
and held for several seconds continuously to activate
l Data logging with a graph of flow, suction pressure, discharge pressure
are plotted against time with continuous updates in real time, and a 6
month record of performance.
l Event logging with a record of faults, alarms, performance, and status,
dated, recorded and retrieval for 6 months.
l Ethernet access using web browser.
Advanced System Graphics Display
Critcal Systems Settings
l On a system, which is not yet programmed, the first screen will say “Critical
System Settings”. Press this button. This screen will not appear after settings
are made.
l Enter the number of pumps in the system and press next to proceed.
l Enter the System Discharge Pressure
l Wake Up Pressure (after sleep mode) is usually 5 PSI less than system
pressure.
l Sleep Speed is the single pump churn or no flow speed and will be different
for each system. As a preliminary value use 80 % of full speed. Variations in
suction pressure will affect this setting and several actual run tests should be
done to fine tune the setting.
A. Lag Pump Staging:
-To stage the lag pump by pressure, set the value at start is 95-98% of full speed.
-If lag pump staging is to be by flow instead of pressure as entered in the Advanced Menu and select staging
by flow. Set the staging points as follows:
1. First Lag Pump Set at 98% of the GPM rating of pump # one.
2. Second Lag pump set at 98% of the GPM rating of pumps one and two.
3. Set other pumps in a similar way.
B. Lag Pump Stop:
-To Stage the lag pump off by pressure set the speed at the same speed as the sleep speed, or as a
preliminary use 80%.
-If the lag pump is to be staged by flow instead of pressure, set stage off points as follows:
1. Stage off the first lag pump at flow = pump flow x .75
2. Stage off the second lag pump at flow = pump flow x 2 pumps x .75.
3. Stage off the third lag pump at flow = pump flow x 3 pump x .75.
NOTE: If the last lag pump is just a spare pump, set its start point abnormally high to prevent staging.
