What is plc and its components?

PLCs are general-purpose microprocessor-based controllers that may offer logic, timing, counting, analog control, and network connectivity.

How does PLC automation work?

To perform the work in the industrial process or machinery, the PLC continually monitors and receives information from input devices or sensors, processes the information, and triggers the linked output devices.

Ladder Diagram (LD), also known as Relay Ladder Logic, is the most often used programming language for PLCs (RLL). This is a graphical language that depicts the logical links between inputs and outputs as though they were hard-wired electromechanical relay contacts and coils.

How many input and output in plc?

Based on the number of inputs and outputs they can manage, PLCs are categorized into the following broad categories: PLC with less than 32 input/output (I/O) functions is known as a nano PLC. Micro PLC: A PLC with more than 32 input/output (I/O) points but no more than 128 I/O functions.

Level Limit Switch in PLC Basics Level switches, also known as Level Sensors, are used to adjust the height of a liquid inside a container, most often a tank. In a liquid level control system or in a heating and mixing application, they are most typically employed in combination with inlet and output valves.