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www.ae20.0om <br /> March 23,2006 <br /> City of Pequot Lakes <br /> 4638 County Road 11 <br /> Pequot Lakes MN 56472 <br /> RE: Supervisory Control and Data Acquisition(SCADA)Upgrade <br /> Dear Mr. Twardy, <br /> - Pursuant to our recent response to your request for a service call to the Pequot Lakes <br /> Water Treatment Plant(WTP),a couple of issues were identified. The SCADA software <br /> continually locks up or not does not display current status information from the control system, <br /> and flow totals do not always display correct data. I verified that the communication from the <br /> computer to other control system components was working appropriately. I was unable to <br /> resolve any issues while at the WTP,but based on experience our recommendations for resolving <br /> the problems you are experiencing,are to upgrade both the computer and the SCADA software, <br /> and revise how the flow totals are calculated. There are two main reasons for upgrading both the <br /> SCADA software and hardware at this time: <br /> 1. The City of Pequot Lakes is currently using SCADA software Wonderware version 6.0. <br /> This software version is no longer supported by Wonderware,and should be upgraded to <br /> the current version 9.5. <br /> 2. The existing SCADA computer is running Microsoft Windows NT operating system, <br /> which is no longer supported by Microsoft. The SCADA computer should be running the <br /> newest operating system,Microsoft Windows XP. ; <br /> The age of the hardware and software creates both a ns , reliability and c <br /> the SCADA computer failed is tabs,Ifiae aF ttu �t _would need to-be 3, <br /> it would be supplied with Microsoft Widows gsaystem. The Windows' <br /> operating system could be installed on the now meter,but the hardware that comes with the <br /> computer(ie. CD drive,USB ports,video cards)may not have drivers that allow them to operate <br /> with the NT operating system. A new version of PCAnywhere software should also be included <br /> with this upgrade. PCAnywhere software allows a user to access a remote PC.,This would <br /> enable AE2S to connect the SCADA computer at your discretion,to make modifications from <br /> our offices,rather than traveling to and from Pequot Lakes. Other advantages of upgrading both <br /> the computer and SCADA software include the following: <br /> • Recovery from hardware 1 day as opposed to 2-3 days <br /> • Ability to print reports the computer'freezing"up <br /> • New hardware provides and restore features <br /> • Latest Wonderware 9 5- <br /> t. <br /> Mg and Environmental Services, Inc. <br /> ;.,o. Beni RrAn1 • (0'.31 R-qad-1 RRR• M 91 R-R?4-1 RRq <br />