SCADACOM for Water/Wastewater


System Overview

Willowglen’s family of water/wastewater customers span the globe. Our host SCADA system, SCADACOM, gives our customers the ability to completely customize the look and feel specifically tailored to their environment. SCADACOM can be operated in a highly available manner ensuring no down time. SCADACOM’s historian and data bank can collect and interpret large amounts of data in real-time.


  • High performance, multi-tasking, real-time processing
  • Intuitive operator tools: advanced graphics, operator logbook and shift handover summary, automated review and historical playback module
  • An integrated alarm management environment
  • Training simulator and operations emulator
  • Industry-specific applications
  • Distributed computing architecture with expandable capacity and performance
  • Fault tolerant operation
  • Support of leading communications protocols
  • Fail-over and load-balancing between servers
  • Support for multiple control rooms including remote disaster recovery control centers
  • Hierarchical implementation links site, regional and centralized control rooms
  • and more…

Specialized software packages implemented for the water/wastewater industry include:

  • Fluid Volume
  • Flow Rate Calculations
  • Fluid Volume Accumulation
  • Pulse Duration Meter Measurement
  • HOA Panel Monitor and Control Interface
  • Automatic Reservoir Set Point Control
  • Pump Sequencing
  • Pump Run Time Accumulation
  • Flow Rate Control
  • Water Quality Analysis
  • Filter Bed Sequence and Backwash Control
  • Chemical Additive Measurement and Control
  • Tidal Gate Control
  • PID Closed Loop Control

Case Studies

Taiwan Water Supply Corporation – Kaohsiung Area Water Distribution Automation

The Taiwan Water Supply Corporation is responsible for the distribution and management of the water resources of Taiwan. The Kaohsiung Area Water Distribution Automation (KAWDA) project encompasses six different area network systems in the Kaohsiung area of southern Taiwan. The Kaohsiung Water Distribution Center (KDC) is connected to each of the six Area Control Centers (ACCs) and is responsible for the monitoring, distribution, control and management of the whole system.

The Challenge

Even though Taiwan is a subtropical island that receives three times the world’s average rainfall, its population of 21 million makes it the 18th “driest” country in the world. The annual rainfall per person is only one-fifth the world’s average. Taiwan draws about 60 percent of its water from surface sources including lakes, rivers and reservoirs. The rest is pumped from underground sources. The Taiwan Water Supply Corporation is responsible for gathering the water, pumping it to the treatment plants and then distributing the purified water to its customers. To monitor and control such a critical system, the Taiwan Water Supply Corporation requires new state of the art SCADA equipment and software for six separate area control centers and one main master control system organized in a pyramid structure. Multiple levels of redundancy are required so that if any one computer fails at an ACC site or the main KDC site, then the system will continue to operate without interruption. The system is to interface to existing PLCs and to eighty-three new Remote Terminal Units. Large historical database storage, easy to use control interfaces and sophisticated reporting, trending and alarming applications are required. Advanced modeling and simulation software is to be used for operation strategy forecasting and for training purposes.


In a competitive bid, Willowglen Systems Inc. was selected to provide the new KDC and ACC master station SCADA system hardware and software, FEPs, and 83 new Remote Terminal Units (RTUs). Water modeling and simulation software from 7T of Denmark was integrated with the SCADA system. Willowglen’s SCADACOM system provides truly high performance 64-bit distributed processing power. The computing load at KDC is shared by two main servers, two operator workstations, one modelling workstation, one training workstation, and a separate workstation is used to drive a video projector in the demo center. At each of the six Area Control Centers, a single server and two operator workstations communicate over Ethernet to a Willowglen FEP which has serial communication lines to the various RTUs. Color inkjet, laser and dot matrix printers are supplied for alarm listings, reports and screen display copies. In addition, the processing power of the SCADA system is easily upgraded, both in terms of speed and capacity, by adding more workstations to the Local Area Network and more CPU modules (up to a total of four) to the servers. Willowglen’s compact, dual 32-bit processor based 1400 Series RTU was selected for installation at the treatment plants, pumping stations and monitoring stations. These powerful RTUs scan the data, time tag results, and use Report-By-Exception techniques to communicate critical events to the master station.

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System Design – Speed & Reliability

The SCADACOM platform is built around an extremely fast object oriented database engine that is notification-driven to provide quick response and reduced system load. The SCADACOM platform is designed from the ground up as a Fault Tolerant system that goes beyond Dual Redundant to offer N-way redundancy for all services.

Supported Hardware

SCADACOM servers run on Intel and AMD processors and the Red Hat Enterprise Linux operating system. Operator workstations also support a Windows environment, in addition to a secure web interface.

Communication Protocols

SCADACOM supports industry standard protocols such as Modbus and IEC870, as well as many non-standard interfaces. SCADACOM provides excellent logging and debugging for supported protocols, allowing for easier troubleshooting of communications with third party devices. SCADACOM also supports OPC UA connectivity.

Operator Graphics

SCADACOM complies with API 1165 “Recommended Practice for Pipeline SCADA Displays”, Human Factors Principles, and industry best practices. The Operator Displays have the ability to use the advanced features available on today’s video cards. As a result, the schematic displays can display anything from simple grey-scale schematics to more life-like colored 3D textures and advanced animations.

Integrated Alarm Management Environment (IAME)

Top-10-Bad-ActorsSCADACOM provides a firm foundation for implementing and sustaining an effective Alarm Management program that conforms to 49 CFR Part 192 and 195 for Pipeline SCADA, ISA-18.2 Management of Alarm Systems for the Process Industries, and EEMUA-191 Alarm Systems – A Guide to Design, Management and Procurement. In addition, Willowglen has designed IAME by incorporating input from industrial advisory boards and experts in the area of Human Factors Design.

Shift Handover and Risk Reduction Process (SHARRP)

sharrpThe Shift Handover and Risk Reduction Process (SHARRP) is an electronic operator logbook and shift hand-off tool. SHARRP allows for the easy and effective recording of significant information and events which occurred during a shift for hand-off review purposes for the next operator and supervisor, as well as for general historic value and investigation. The module enables users to reduce the risk of human error which can occur during a shift change, by providing an electronic review and capture of the critical information that is typically exchanged between operations teams resulting in a reduction of incidents and improving safety records.

Automated Review Module (ARM)

SCADACOM’s Automated Review Module (ARM) is used to investigate past operational situations and sequence-of events for purposes of continuous improvement or incident review – consistent with the principles of operational excellence. ARM provides a means to record in fine detail all of the data in the SCADA system – and then at a later point step through the information at a rate suitable for review, so that the exact sequence of events can be fully understood. ARM ‘arms’ your organization with information, and provides an easy and effective way to help personnel ‘experience’ and understand past events and actions – in a format that emulates the operators’ working environment.

System Configuration and Programming

SCADACOM comes with a standard set of configuration tools and wizards designed to make it easy to configure the system. Together with the ability to export sections of the database to tools like Excel, it is easy to configure and maintain SCADACOM. SCADACOM’s symbol library ensures a quick start to any project.

Emergency Backup Centers

SCADACOM supports emergency backup center configuration through the Emergency Backup Center Module.

Training and Operations Emulator (TSOE)

SCADACOM’s Training and Operations Emulator (TSOE) is an optional package which is used to train SCADA Operators. TSOE provides the means to take operators through standard operations as well as unusual events – providing a safe and effective way to give operators the experience they need, in an environment which is identical to the live system.