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The term programmable logic controller (PLC) refers to the industrial digital computers that are designed for controlling various manufacturing equipment such as industrial robots, escalators, power stations, and assembly lines. These sophisticated devices are used to control production processes where dependable controls, flexible programming, and ease of troubleshooting is of immense importance.
The
significance of industrial computers increases in applications where
precision with zero error is critical. Initially, it was the automotive
industry that utilized computer-controlled systems in order to replace
cam timers and hard-wired relays. Now, computer-driven tools have become
a vital part of industrial process control and factory automation. All
the equipment or devices working on producing something in a facility
needs to be organized in terms of time intervals. For instance, in the
automobile industry, one device or a set of devices works on painting
car exterior and the other machine works on engine parts. One of the
functions of an industrial digital computer is to set the specific time
frame for machines so that all the processes can be performed in a
perfectly harmonious manner. Industrial computers were introduced
in the 1960s and before that, manufacturers relied on cam timers, relays
and other similar kinds of devices to streamline their manufacturing
processes. They control a wide range of applications from small
production systems to large processing plants. Some of the advantages of
PLC include:
Central Processing Unit (CPU), memory, and input & outputs are the
three fundamental component of an industrial digital computer. Like in
the personal computer, CPU plays the part of a brain in a computer as it
performs all the communication, arithmetic, logical and memory related
operations. The memory component in PLC operates almost the same way as
that of personal computers. As mentioned earlier, the ability
to perform effectively for years in harsh industrial environments is
what makes PLCs different from personal computers. A digital computer
has to be flexible and configurable. The 21st Century process control
expects functional flexibility, superior performance, and a smaller form
factor from a control system. The rapid development in the
industrial automation technology has made it possible for manufacturers
to produce high-quality products cost-effectively and at large scales.
Powerful industrial computers, robots, sensors, intelligent and
automated devices are the present and the future of modern industries.
It would be hard for industries to stay competitive in future without
embracing the modern industrial technologies.