PLC (Programmable Logic Controller)

Brands We Repair:

What They Do:

PLC's quite simply, are computers that are used to
control electronic actuators that in turn control
machine processes.

Primary Types and How They Work:

There are several manufacturers of PLC's and each
offers a choice of several models. All of them however,
work on similar principles using solid state switching,
but different models vary in size and appearance.

Some may have extra features, or a number of different
internal components, or may have a different input and
output capacity. They all however contain a basic unit
called the CPU (Central Processing Unit), a power supply
to operate it, (sometimes incorporated-sometimes
separate) and some form of input device to enter
program information.

In addition, certain models can have add-on units to
increase their capacity for input and output channels-
obviously to control more equipment and their changes. Because these units are "programmable" they can be loaded with specific commands to carry out tasks on a variety of circuits.

The program can be corrected, modified, or completely changed at anytime, usually without wiring changes. After a program is stored in the memory bank of the CPU it can be duplicated into a nonvolatile storage (hard drive, floppy, etc.) for use in other PLC's or as a backup. Also,
a number of different process programs can be stored and recalled into the PLC's CPU and will take over control. Most CPU's have no moving parts and are therefore less likely to develop noticeable service problems. Some do have relays with a mechanical action, yet the actuating circuit malfunction is most likely only traceable by a technician with the proper equipment.

Repair Procedures:

Customer Code

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Company:
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Paragon Technologies
Paragon Canada
Paragon Atlantic
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Paragon Technologies, Inc. 5775 Ten Mile Road Warren, MI 48091 phone: (800) 229-5350 fax: (800) 229-5375 Email Paragon Technologies	Paragon Canada 1100 S. Service Road #103 Stoney Creek, Ont., Can. L8E 0C5 phone: (800) 567-3786 fax: (905) 825-2009 Email Paragon Canada	Paragon Atlantic 2919 Interstate Street Charlotte, N.C. 28208 phone: (800) 756-9150 fax: (800) 229-5375 Email Paragon Atlantic	Paragon Pacific 82 Corporate Park Dr. Henderson, NV 89074 phone: (800) 756-9160 fax: (800) 229-5375 Email Paragon Pacific

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