Programmable logic devices are also referred to as programmable logic controls or programmable logic controllers. A programmable logic controller (PLC) consists of small microcomputers or electronic parts that software designers can use to program machinery and computer-related applications. Programmable logic controller programming works in materials handling, food packaging and processing, machining and batch process controls. Data management systems and local area networks also rely on programmable logic controllers.

Programmable logic control tools are incorporated into office or industrial functions such as mathematical calculations, hardware interfacing, timing and control, data communication, signal processing, and data entry and display. Software designers then use programmable logic devices to test in graphic calculators, DVD players, GPS navigation systems, computer network routers and DSL modems. Programmable logic devices (PLDs) have real-time capabilities that allow electronics and other products to work immediately upon reprogramming. Programmable logic devices can be reprogrammed as often as necessary because software designers use tools that feature rewritable memory technology. A programmable logic device is small enough to place next to other microprocessing machinery for easy accessibility.

1. Determine the need for programmable logic devices (PLDs).

2. Find programmable logic controller training services.

3. Buy programmable logic devices and controls from automation manufacturers and distributors.

Action Steps
The best contacts and resources to help you get it done

Determine how you will use programmable logic devices

Most programmable logic devices are used to operate electronics such as calculators and computers.

I recommend: WAGO manufactures programmable logic devices (PLDs) for standalone, digital and networked equipment. Program4 Engineering offers programmable logic devices and accessories for plant process applications. AMETEK Automation and Process Technologies produces and distributes programmable logic controller programming equipment for cable and hose carriers, industrial brakes and switches.

Get training to work on programmable logic devices

Programmable logic controller training services help you stay on top of any advances in programmable logic device technology.

I recommend: Siemens offers self-study and on-site courses on using programmable logic devices and other automation systems. Sequential Automation Consultants includes training, engineering and start-up support services. Robotek also provides training for programmable logic devices.

Shop for programmable logic devices online

Automation manufacturers and distributors maintain a large inventory of new and used programmable logic controllers and devices.

I recommend: Santa Clara Systems specializes in new and remanufactured parts for programmable logic controllers. Digital programmable logic controllers from CAL Controls include three-year warranties. AutomationDirect offers programmable logic controllers at competitive prices.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Programmable logic devices are inexpensive to produce and program. They can also operate in temperatures ranging from 0 to 50 degrees F.
• •  Programmable logic controllers perform functions such as logic, sequencing, mathematical, counting, digital and analog inputs and outputs to monitor speed, temperature or pressure. Assembly lines and robots are also controlled by PLC programmable logic controllers.
• •  Electronics and other automated products can be reprogrammed remotely through the Internet or from a control center that works with programmable logic devices, even after the items have been shipped to a customer.