The task of machines supervisions and industrial processes on a regular process can be an irritating and boring job because you always stand beside a machine or being on a 24-hour patrol around the equipment to ensure that the water levels, temperature levels as well as oil levels are correct. You also spend hours performing other duties that in truth, waste a lot of time. However, to eliminate this excruciating tiresome task, experts designed tools and sensors that would at least prevent or rather minimize the frequency of carrying out routine checkups. As a result, the control systems and other components such as SCADA systems were devised.
SCADA system makes it easy for one to monitor equipment, thanks to the sensors that are placed at various spots from the primary location.
A Brief History
Supervisory control was first introduced and used in electric utility systems when there was a need to control remote substation equipment, without sending an office administrator. In the 1940s, a pair of wires from equipment was used between different spots. The ability to use a couple of wires was soon put to implementation, borrowing ideas from magnetic stepping switch devised by telephone firms in the 1930s.
In the 50s, the first minicomputers were designed and used in various industries. In the 60s, what were once used as mini computers, were now used for supervisory control and remote monitoring. The word SCADA came into existence in the early 70s, and the introduction of programmable logic controllers and microprocessors gave companies the ability to monitor quickly and manage automated processes.
In the 80s and 90s, SCADA technology evolved rapidly with the widespread use of LAN technology which allowed the systems to connect to other systems via a PC-based HMI program.
In the next decade, the structured query language was the primary resource for IT databases. However, SCADA developers did not use the SQL databases. For that matter, this led to a feud between IT and fields of controls.
Modern SCADA systems
Modern SCADA systems are different from the past ones because they allow easy access to real-time data from anywhere around the globe. This ability makes it easy for business, governments as well as persons to make informed decisions about how to improve data processes. Without the SCADA program, it would be very hard to collect enough information for constant well-informed decisions.
Elements of SCADA Systems
SCADA monitors manage and send alarms from a centralized location. This involves different communication among SCADA central host computers, programmable logic controllers or numerous separate units. The following are the elements of SCADA systems…
- SCADA master station computer systems
It is a standard hardware tool, and very few people have ventured out to design their computer tools. Only a few companies such as CDC and IBM tried to manufacture hardware for it, but all the efforts proved futile later.
- Human-machine interface
This is the crucial part of the host station, the values stored in the host computers are presented via this interface in an understandable form using HMIs. Visit at: http://www.parasyn.com.au/data-acquisition-services-scada-systems-rtu-solutions/