copyright © 2002 delmar thomson learning chapter 2 micro programmable logic controllers
TRANSCRIPT
Copyright © 2002 Delmar Thomson Learning
Chapter 2
Micro Programmable
Logic Controllers
Copyright © 2002 Delmar Thomson Learning
Objectives
Define a micro PLC.Explain the advantages of using a
micro PLC in new machine development.
Explain the difference between a micro PLC and a modular PLC.
Look at an overview of selected manufacturers’ micro PLCs.
Copyright © 2002 Delmar Thomson Learning
What Is a Micro PLC?
Typically 32 inputs and outputs or less
Self-contained unitsProcessor, power supply, and I/O
built into one package
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Micro PLC Advantages
Package size smallerLower costLess complexity than larger PLCsEasy installation
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Micro PLCs Versus Modular PLCs
Use when relay replacement and only basic control is desired.
Micro has smaller footprint.Micro PLC less complex than
modular.Easy to embed micro into machine
when only basic control is needed.Limited instruction set means easier
programming.
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Omron CPM1A Series Micro PLC
10, 20, 30 or 40 I/O availableHand-held programming or SYSMAC
Windows-based software programming
Sinking, sourcing, or relay outputsTwo analog inputs and 1 analog
output.Maximum 100 I/O points
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CPM1 Ten I/O Micro PLC Features
Image courtesy of Omron Electronics, Inc.
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3 MicroLogix 100 Micro Controllers and a Handheld
Programmer
Image courtesy of Allen-Bradley, a Rockwell Automation business
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Specifications for Rockwell Automation’s MicroLogix
1500
Image courtesy of Allen-Bradley, a Rockwell Automation business
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MicroLogix 1500 Hardware Features
Image courtesy of Allen-Bradley, a Rockwell Automation business
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Installing the Processor Unit in the MicroLogix 1500 PLC
Image courtesy of Allen-Bradley, a Rockwell Automation business
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Simatic S7-200 Micro PLC
Image courtesy of Siemens Energy & Automation, Inc.