Introduction to Programmable Logic Controllers - Part II
Chong Chen, Ph.D., P.E.
A Programmable Logic Controller (PLC) is a device that is capable of being programmed to perform control functions. The first PLC was introduced in the late 1960s to replace relay logic controls in the automotive industry. Compared to relay logic controls, the PLC's advantages include easy programming and installation, high control speed, hardware and software security, network compatibility, troubleshooting and testing convenience, and high reliability.
PLCs are currently used widely in industrial and commercial environments. They can be found in almost any manufacturing facility. There are several manufacturers of PLCs. While the instruction formats may not be the same for different brands, the hardware structures and programming concepts are very similar. This course discusses comparison instructions, math instructions and control instructions used in PLC programming.
This course includes
a multiple-choice quiz at the end.
At the conclusion of this course, the student will:
Course ContentThis course is the second part of a two-part course on Programmable Logic Controllers. There are a total of six modules in this two-part course. Part I covers Modules 1 through 4. Part II covers Modules 5 and 6. In part I, PLC hardware structure, input/output modules, binary number and logic functions, bit instructions, timers, and counters are introduced. Part II covers comparison instructions, math instructions and control instructions used in PLC programs. Knowledgeable of the content discussed in part I is required for studying Part II.
Course Modules - Part II (PDF Format)
Module 5: Comparison Instructions and Math Instructions
The above course modules are in PDF format. You need to open or download those documents to study this course.
For your convenience
or for better graphic quality, you may also download the same modules in MS
Course Modules - Part II (MS Word Format)
1. Allen-Bradley: Advanced Programming Software User's Manual.
2. David A. Geller: Programmable Controllers Using the Allen-Bradley SLC-500 Family, Prentice Hall.
3. Colin D. Simpson:
Programmable Logic Controllers, Prentice Hall.
Once you finish studying the above course content you need to take a quiz to obtain the PDH credits.