Micro PLCs in Machine Development: Advantages, Differences, and Manufacturers
Discover the benefits of using micro PLCs in new machine development, learn how they compare to modular PLCs, and explore popular micro PLC models from top manufacturers.
Micro PLCs in Machine Development: Advantages, Differences, and Manufacturers
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Presentation Transcript
Chapter 2 Micro Programmable Logic Controllers
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.
What Is a Micro PLC? • Typically 32 inputs and outputs or less • Self-contained units • Processor, power supply, and I/O built into one package
Micro PLC Advantages • Package size smaller • Lower cost • Less complexity than larger PLCs • Easy installation
Micro PLCs Versus Modular PLCs • Use when relay replacement and only basic control is desired. • Micro has smaller footprint. • Micro PLC is less complex than modular. • It is easy to embed micro into machine when only basic control is needed. • Limited instruction set means easier programming.
Omron CPM1A Series Micro PLC • 10, 20, 30, or 40 I/O available • Hand-held programming or SYSMAC Windows-based software programming • Sinking, sourcing, or relay outputs • Two analog inputs and 1 analog output • Maximum 100 I/O points
CPM1 Ten I/O Micro PLC Features Image courtesy of Omron Electronics, Inc.
3 MicroLogix 100 Micro Controllers and a Hand-held Programmer Image courtesy of Allen-Bradley, a Rockwell Automation business
Specifications for Rockwell Automation’s MicroLogix 1500 Image courtesy of Allen-Bradley, a Rockwell Automation business
MicroLogix 1500 Hardware Features Image courtesy of Allen-Bradley, a Rockwell Automation business
Installing the Processor Unit in the MicroLogix 1500 PLC Image courtesy of Allen-Bradley, a Rockwell Automation business
Simatic S7-200 Micro PLC Image courtesy of Siemens Energy & Automation, Inc.