McKim & Creed engineered a SCADA upgrade that elevated existing systems to current technology.
The City of Georgetown used an aging SCADA system to monitor and control its water treatment plant (WTP) and collection, raw water and distribution sites. The WTP resident iFIX HMI communicated serially over fiber optic cable with numerous remote sites that utilized programmable logic controllers (PLCs). However, these PLCs were no longer sold or supported by the manufacturer. This created situations where technical support, updates and spare parts were difficult to obtain and unnecessarily expensive.
McKim & Creed designed and implemented the project in three phases.
Phase 1 consisted of a design/planning workshop with the City. This culminated in a technical memorandum and decisions to:
- develop a standard remote telemetry unit (RTU) design,
- replace the serial communication hardware with an Ethernet-based fiber optic infrastructure,
- develop a SCADA HMI Standards document to align current and future system development, and
- completely redo the HMI application to monitor the collection system. The new application would feature high-performance graphics, mobile clients and reliable remote alarm notification.
In Phase 2, McKim & Creed replaced seven lift station RTUs and three distribution system RTUs. The sites were configured with a set of standard SCADA status/alarm signals transmitted to the newly developed HMI application at the water treatment plant. Several sites did not have these signals, so McKim & Creed implemented improvements to provide those signals. This included RVSS programming, pump control panel / starter troubleshooting and wiring modifications, system functionality diagnosis, running new wire in existing conduits, troubleshooting signals and circuits, programming new and existing PLCs and managed Ethernet switches to facilitate communication, and configuring the new and existing HMI applications.
Phase 3 involved replacing and upgrading the iFIX water treatment plant HMI application with a VTScada application. The VTScada system features redundant servers, high-performance HMI graphics, industry best-practice alarm management, mobile HMI client architecture and remote alarm notification.