Friday, 22 Feb 2019

Electrical Supply: Programmable Logic Controllers

Programmable Logic Controllers

Programmable Logic ControllersWhen looking for electrical supply, there is a device that can make life easier. This is the Programmable Logic Controller. A Programmable Logic Controller, or PLC, is an industrial computer that is controlled to perform a series or sequence of events. It can be used to control lights, sensors and other electric and electronic devices in the home or office. Read on to find out more about a Programmable Logic Controllers and it’s what it’s done to make the world of electrical supply more convenient.

The Programmable Logic Controller works when stimuli are received through delayed actions like time delays or counted occurrences. These events will, in turn switch electronic control gear on or off or set certain devices in motion. The PLCs will continually loop through its program waiting for input and output as it continues functioning.

The PLC was first used in the automotive industry allowing software to replace hours of labor in rewiring when a new production model was introduced. The PLC can replace thousands of relays and wires. It can now be found in practical use in the following applications (to name a few):

  • Roller Coaster Rides
  • Servo Axis Controlled Camera Positioning (Film Industry)
  • Escalator Operation
  • Glasshouse Heating, Ventilation and Watering (agriculture)
  • Industrial Batch Washing Machine Control System
  • Filling Machine Control System (Food Industry)

There are three forms of program logic that PLCs understand. Of these three, the most common and easiest to grasp is Ladder Logic. In Ladder Logic, there are contacts and coils that can be loaded and driven in different configurations. It is called Ladder Logic because the coils, relays, timers and other instructions can be placed on rungs. Where the instructions are placed will determine the output logic of the rung. The software has a programming instruction set that covers the instructions, timers, counters and more.

Programmable Logic ControllersPLCs are used more and more often for mechanical and electrical supply purposes. They are noted for their ease of use in programming and wide range of applications. They are also relatively low cost in comparison to specific custom use controller designs. They are becoming more and more popular as standalone models and as functionality safety rated hardware that can be added to existing controllers.

PLCs are available for purchase at many electrical stores. They can also be found at electrical supply online retailers. Here those looking to purchase a PLC, can choose from a number of models whose prices will vary according to the amount of memory the PLCs have, the speed they work at, the performance of the product and the amount of software and support the PLCs come with.

PLCs are the wave of the future. A single PLC can replace a whole industry offering a user-friendly replacement to obsolete, cumbersome machinery. Electricians, engineers, mechanics and other types of contractors should look into incorporating PLCs into their work for effective, efficient and robust systems delivered to their customers.