Most modern manufacturing, utility or processing plants are unable to run without their Supervisory Control And Data Acquisition (SCADA) system, which is a computer-based control scheme allowing a single operator or small group of operators to oversee a variety of processes. SCADA is a “force-multiplier.” By using distributed electronic controls and sensors to perform batch or repetitive tasks, SCADA only alerts the operator if something needs attention or has exceeded pre-set parameters. Several types of SCADA systems are in use. The main differences are generational. Early systems vary greatly from more modern systems as well differences between modern systems themselves. Modern SCADA systems tend to use a “Mix and Match” variety of components and software. Unlike earlier SCADA systems, which primarily used vendor-proprietary software and sometimes hardware, current systems are based on more general use software. The hardware tends to be more interchangeable as PLC and other sub-unit vendors have standardized communications and other protocols to allow the user to choose the best component for their needs rather than being tied to one vendor’s line of products. While earlier SCADA systems were limited to single building or sometimes single site networks, many current SCADA systems connect to the Internet, which raises security risks not seen with older or “sealed” systems. Writer Bio
