In most processes, there are six basic elements.Process control elements are 1. Controlled variable What you want to control (temperature pressure, level, flow rat, dimensions, position, etc.) 2. Measured variable What you observe in order to determine the actual condition of the controlled variable In most cases, you measure the controlled …
Relays – Relays are switches that open and close circuits when actuates with an electrical signal. A switch is a device that can open and close when actuated manually,typically through a physical action by a person or an object. Relays are used in application where it is necessary to control one or more circuits by …
What is a relay ? Internal architecture of a relay Read More »
What is PLC? PLC is a solid state device which control output device based which control output device based on input device and user developed program. It performs relay equivalent functions.Modern PLCs can perform complex operations like PID control and Analog signal processing. Advantages of PLC over relay logic. Cost effective. Easy maintenance …
Basic Concept of PLC (Programmable logic controllers). Read More »
