What are the basic principles of operation of the programmable controller?

Answer 1

Programmable controllers operate based on three basic principles: input processing, logic execution, and output control. They receive signals from input devices (like sensors and switches), process these inputs according to a programmed logic or control algorithm, and then produce corresponding output signals to control devices (like motors and actuators). This process typically follows a scan cycle, where the controller continuously reads inputs, executes the control logic, and updates outputs. Additionally, programmable controllers are designed for flexibility, allowing users to easily modify or update the control program as needed.