Page 15 - 3. References

REFERENCES 3

St. Cloud, Minnesota
WTF SYSTEM IMPROVEMENTS AND CONTROLS UPGRADE

The control system in the St. Cloud ultimately required an older operating a reduction in the communication error
Water Treatment Facility (WTF) system to be installed on the new rate to almost zero occurrences, resulting
consists of seven programmable logic computers. in a much faster data update rate on the
controllers (PLCs), two redundant The services of AE2S were obtained SCADA system.
SCADA Server nodes, and six client to replace the existing communications Since the Controls System Upgrade
nodes located throughout the plant. The network with an Ethernet network and project was completed, the City
WTF was experiencing problems with to upgrade the operating system to elected to have a Facility Optimization
communications between the PLCs Microsoft XP Professional. The PLC Study completed (also performed
and the SCADA system. The City of processors were replaced by processors by AE2S). Bench-level laboratory
St. Cloud had recently purchased new with Ethernet ports and the Ethernet tests and SCADA data were used to
workstation computers, hoping that network components were set up in a ring support the development of operational
the upgraded hardware would solve the configuration to allow for redundant data approaches for each treatment process.
communications issues. Instead, the new paths. The entire WTF stayed running Implementation of the tools developed in
operating system was not compatible with while both the processors and the network the study resulted in improved treatment,
the existing communications network and components were replaced. process efficiency, energy efficiency, and
The successful result of this project was overall treatment process stability.

DATE
2005 - Present
CLIENT
PROJECT COSTS City of St. Cloud, MN
$141,800
CLIENT CONTACT
Lisa Vollbrecht
Assistant Public Utilities
Director
320-255-7225

KEY PROJECT ELEMENTS
• Complete System Upgrade
• Optimization of Multiple
Treatment Processes
• On-Going Extension of Staff
Support

AE2S BURNSVILLE TECHNICAL SPECIALTY CONSULTANT ENGINEERING SERVICES SOQ 3.15