The SCOPE-based Airport Control System at London Heathrow Airport originally consisted of ten Nexus database servers (five duty standby pairs), a duty standby data archiver and a site wide workstation licence agreement. The system now handles in excess of 100,000 digital signals and 20,000 analogue values sourced from more than 100 Rockwell SLC500 and PLC5 based outstations encompassing the monitoring and operation of numerous engineering systems including but not limited to:
• 33kV and 11kV high voltage electrical network
• Firemain system
• Potable water
• Foul drainage
• Tunnel control systems
• Fixed electrical ground power (FEGP)
• Passenger sensitive equipment (lifts, travelators)
• Boiler house indications
• Airfield indications
• Other ancillary engineering systems
The original 1995 SCOPE SCADA system was based on a dual redundant client server architecture running under Solaris and provided a central control room, along with remote access for maintenance and a fallback control room operation in the event of a major incident.
The system recently underwent a major upgrade to the latest version of SCOPE that runs on a Capgemini hosted virtualised environment. This upgrade also included any possible deployment scenario; dedicated client, or a thin web based client including HTML5 support.
The upgraded system is fundamental to the Airports Operational Centre (APOC) that went live in 2017. APOC covers all terminals and tunnel control systems and is therefore critical to the airports round-the-clock operation.
The visualisation displays built using Prism Studio allows intuitive graphical and tabular displays to be produced quickly using familiar, common drawing package actions e.g. drag and drop and provides facilities for creation of animated object libraries driven by the telemetry data.
Within the Heathrow system, outstations are based on PLC and RTU technology; plant data is sourced from a variety of outstation devices and transferred back to the SCOPE system. The Rockwell SLC range of PLC devices is used extensively in simplex and dual redundant configurations.
Developments over the years for London Heathrow have included time tagged data collection from Credit And Load Management Units (CALMU) for HV power monitoring and specialist alarm data transfer protocol to interface to the CEM MAID access control system. All protocols in the original system were able to take advantage of the true dual server hardware topology with automatic re-routing of data in the event of equipment failure.