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PLC, PAC and Dedicated Controllers

PLC (Programmable Logic Controller) has become the soul of industrial automation as it is the hardware component that is directly in contact with the instruments of the field. It gives the access to control and monitor the array of connected machinery and the software system integrated with it. The PLC system can efficiently work with a variety of communication protocols like data analysis, conversions, i/o interfacing, linking, signal processing, rendering etc. The system is absolutely user-programmable. Its monitoring and maintenance are even more hassle free. One can set triggers on different parameters like temperature, liquid level, opening or closing of valves, etc. It can be used in the simplest of devices like garage doors to the complex systems like a powerhouse.

In the domain of motor control, there is an array of different systems and devices which are used, all having unique functions and offering key benefits to users. One of them - a Programmable Logic Controller - has a sturdy framework with unique functional characteristics such as sequential access control, ease of programming, timers and counters, easy-to-use hardware, and consistently secure controlling capabilities.

The applications and uses of Programmable Logic Controllers are wide and diverse in nature. Be it a residential, commercial, or industrial setting, PLC (Programmable Logic Controller) play a huge role in our daily lives. A PLC linked with graphical displays such as an HMI are key components of the broader concept of SCADA. Both these phenomena help propel the applicability of SCADA systems across different industrial sectors. Take your manufacturing processes to the next level with Schneider Electric Singapore’s wide range of innovation-driven PLC (Programmable Logic Controllers), specially designed to give you greater control in even the harshest and most hostile conditions.

The working principle of a PLC can be divided into 4 basic steps i.e., a thorough input scan, output scan, program scan, and housekeeping. To ensure that a PLC is delivering quality results, these four steps take place in a continual loop. In other words, first the PLC understands the state of all input devices, then launches the execute program logic, De-energized/energizes the devices connected to the PLC, and lastly communicates with internal diagnostics, programming terminals, etc.