Rabu, 20 Oktober 2010

Installation and Maintenance of PLCs

Installation and Maintenance of PLCs

The purpose of this course is to provide the student with a thorough coverage of the various safety precautions, preventative maintenance, and troubleshooting techniques associated with a typical PLC system. In addition, the course also covers proper grounding techniques, sources of electrical interference, and I/O installation techniques. Field checkout and troubleshooting with an emphasis on practical troubleshooting and problem-solving strategies.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • List three safety precautions when installing PLC systems.
  • Define system layout.
  • List three safety measures for PLC installations in control panels.
  • Describe proper grounding techniques for PLCs.
  • Name three precautions to avoid electrical interference.
  • Define cross-talk interference.
  • Explain I/O installation.
  • Describe the need for I/O documentation.
  • Define leakage current and explain the purpose of bleeder resistors.
  • Explain the field checkout of PLC systems.
  • Provide periodic maintenance for a PLC system.
  • Troubleshoot PLCs.
  • Describe redundant PLC architecture.

Programming Terminals and Peripherals of PLC

Programming Terminals and Peripherals

This course is intended to provide students with an overview of the wide range of programming terminals currently in use and to outline some of the key differences between them. In addition, the course covers topics such as hand-held programming terminals and computer-based software packages. The operation of host computer-based systems is also covered as well as the application of peripheral devices in a PLC network.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Define the term programming terminal.
  • Describe the application of dedicated programming terminals.
  • List the two types of programming terminals.
  • Describe the purpose of mini-programmers.
  • Define computer-based programming terminals .
  • Differentiate between programming software and documentation software.
  • Describe the function of a host computer-based PLC system.
  • Explain the purpose of peripheral devices.

Module 3 - I/O System of PLC

I/O System

This course covers all aspects of the Input/Output system for PLCs including discrete, analog, and data I/O. In addition, the course also presents an overview of I/O addressing and an introduction to Allen-Bradley I/O parameters. Course topics also include the principles of remote I/O and an introduction to scaling and resolution of analog devices and signals.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Explain the purpose of the I/O system
  • Describe how I/O addressing is accomplished.
  • Define discrete inputs.
  • List four tasks performed by an input module.
  • Describe the basic operation of a discrete output.
  • Explain the purpose of data I/O interfaces.
  • Define analog I/O.
  • Describe the resolution of an analog I/O module.
  • List three applications for advanced I/O.
  • Explain the purpose of remote I/O.

Central Processing Unit

Module 2 - Central Processing Unit

This course is intended to familiarize the student with the most important aspects of the PLC's central processing unit. Topics covered in the course include memory devices and memory storage, as well as an introduction to data storage and processing. In addition to covering memory utilization and memory mapping, the course also provides detailed information on multiprocessing and PLC scan functions.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Define the term CPU.
  • Explain the purpose of the executive program.
  • Understand the application of buses in a CPU.
  • List two types of CPU diagnostics.
  • Differentiate between fatal and non-fatal errors.
  • Explain the advantage of multiprocessing.
  • Describe the two general classes of memory devices.
  • Name four types of memory.
  • Define memory protect.
  • Explain the purpose of memory utilization and how it applies to PLC systems.
  • Describe the scan function

Overview of PLCs

Module 1 - Overview of PLCs

This module provides a general overview of PLCs and their application in industry. The origins of the PLC and its evolution are covered in detail. The advantages of PLCs are also outlined, and the main components associated with PLC systems are explored. An introduction to ladder logic is presented and the most common types of PLC signals are covered with an emphasis on practical application.

Learning Outcomes:

Upon completion of this module the student will be able to:

  • Describe the purpose of a control panel.
  • Define a programmable controller.
  • List six factors affecting the original design of programmable controllers.
  • Name three advantages of PLCs compared to relay logic systems.
  • List the three main components in a PLC system.
  • Understand the term ladder logic.
  • Describe the application of PLC signals.
  • Explain the difference between a bit and a word

Minggu, 19 September 2010

plc training for the beginner

Look around in any modern manufacturing facility and you will find PLCs, or Programmable Logic Controllers. You have seen all the names; Allen-Bradley®, Modicon®, Texas Instruments®, Siemens® and so on. Large companies and small companies use these types of computers to automate and control their manufacturing processes.

Understanding how these PLCs work is very important to anyone who works with industrial equipment. PLC training and ladder logic training will help you in your current job or help get you the job you want. Browse CareerBuilder sometime and find all the companies looking for people who understand PLCs, PLC control and ladder logic.

Unfortunately, learning what makes a PLC tick and how to program one is usually expensive and is normally done on somebody else's schedule.

If you understand how a PLC works, you can:

create PLC programs and edit existing relay ladder logic

make yourself worth more to your company

communicate your ideas better to your co-workers.


If you have always been a bit mystified by these "black boxes", then this PLC training manual is for you.

This PLC tutorial explains everything you need to know to get a solid understanding of PLCs and provides the most cost-effective PLC training available today.

This ebook is a PLC tutorial that is more than an introduction to PLCs and PLC control. It contains real world examples that are a result of 16 years of PLC programming experience. It contains tips and routines you can start using immediately to write your own PLC program.

To the beginner, it is more valuable than the thick and complex books written by college professors. They cover functions and algorithms you may never use. After wading through one of these, you still might not know how to turn on a motor.

The "Beginner's Guide to PLC Programming" makes learning ladder logic easy with our online plc training. . And it is written in plain English.






"Beginner's Guide to PLC Programming" will

define the most commonly used terms, such as rung, bit, input, output, etc.

explain relay ladder logic in simple, easy to understand terms

give you the "13 Marks of a Well Written PLC Program"

explain Machine Diagnostics and how to use them in your PLC program

save money and save time

teach you the basic knowledge you need to be a top-notch PLC programmer

introduce you to PLC control, and how it is used in plant automation


Sabtu, 22 Mei 2010

Procedure When the Device Type and CPU Type Are Not Known

This procedure is possible only when connected directly to the CPU Unit विथ a serial connection।If you don't know the device type and CPU type but are connected directly to the CPU Unit on a serial line, select PLC - Auto Online to go online, and थें select PLC - Edit - Information from the मेनुस The PLC Information Dialog Box will be displayed and can be used to confirm the unit version of the CPU Unit।