Chapter 2 Micro Programmable Logic Controllers. Objectives Define a micro PLC. Explain the advantages of using a micro PLC in new machine development.

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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.