Print this page Introduction to Programmable Logic Controllers - Part II
Chong Chen, Ph.D., P.E.
Course Outline
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.
Learning Objective
At the conclusion of this course, the student will:
- Learn comparing instructions and their functions;
- Be able to use comparing instructions for PLC programming;
- Learn math instructions and their functions;
- Be able to use math instructions for PLC programming;
- Learn MCR, Jump, and Subroutine instructions and their functions; and
- Be able to use
MCR, Jump, and Subroutine instructions for PLC programming.
This 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
Module 6: Control 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
Word format.
Course Modules - Part II (MS Word Format)
Module 5: Comparison Instructions and Math Instructions
Module 6: Control Instructions
References
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.
DISCLAIMER: The materials contained in the online course are not intended as a representation or warranty on the part of PDHonline.org or any other person/organization named herein. The materials are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered professional engineer. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.
