What is CPU?

What is CPU?

CPU is the brain of the PLC

It is controlled by the program called the operating system or OS.

And the execution is the collection of the program which is stored in the memory.

Duties of the CPU?

Duties of the CPU?

The CPU reads the inputs and processes the control program and controls the outputs as per program.

CPU provides internal memory, timers and counters and other instruction set.

Commands connected outputs can be controlled based on program. For examples light, fan etc.

Inputs examples for the PLC

Inputs examples for the PLC

Switches and Pushbuttons

Sensing Devices

Limit Switches

Photoelectric Sensors

Proximity Sensors

Condition Sensors

Pressure Switches

Level Switches

Temperature Switches

Vacuum Switches

Float Switches

Encoders