Central Utah Water Conservancy District was expanding their Utah Valley Water
Treatment Plant. The project included replacing all the PLC's and installing a
new HMI system. My task was to come into the middle of the project, after a
co-worker went to another employer, and complete the project. The system
included redundant SCADA servers using Intellution iFIX with six touch- screen
view nodes and two other view node stations. Remote stations were connected by
10Base fiber optic connections. These computers originally had the Windows NT
operating system that I later upgraded to Windows 2000 because of project
specifications. Communications to all PLC's and PC's were Ethernet.
Communications to the eight different valve networks used a Modicon Bridge Mux.
Trying to integrate completed screens, partially completed screens and screens
not yet created so that the look and feel of the system was consistent was
challenging. I didn't want to go back and redo work already completed, that
would not be cost effective. I have included one of the
Another task was to create simple reporting. A
One of the nice features included on this screen can't be seen. If you double
click the trend itself you can go and create trend groups and save them to be
called back later.
On the Filter screen is
a little tiny trend buttons that if clicked will pull up a saved
trend group. Pages F9 & F10 show a sample report created in Excel. Again it's
not what you see but what you don't see. I installed a product called XLReporter
After I configured and created VBA code the operator could press the Run button
on the introduction page of the report and it retrieves all the data for the
date requested and fills in the Excel spreadsheet.
Some more screen shots:
Analog Alarming Setup &
Discrete Alarming Setup. Photo of
PLC-1 and the
Operator Interface Terminal (OIT).