1. Copyright © 2002 Delmar Thomson Learning Chapter 2 Micro Programmable Logic Controllers

2. 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.

3. Copyright © 2002 Delmar Thomson Learning 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

4. Copyright © 2002 Delmar Thomson Learning Micro PLC Advantages  Package size smaller  Lower cost  Less complexity than larger PLCs  Easy installation

5. Copyright © 2002 Delmar Thomson Learning 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.

6. Copyright © 2002 Delmar Thomson Learning 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

7. Copyright © 2002 Delmar Thomson Learning CPM1 Ten I/O Micro PLC Features Image courtesy of Omron Electronics, Inc.

8. Copyright © 2002 Delmar Thomson Learning 3 MicroLogix 100 Micro Controllers and a Handheld Programmer Image courtesy of Allen-Bradley, a Rockwell Automation business

9. Copyright © 2002 Delmar Thomson Learning Specifications for Rockwell Automation’s MicroLogix 1500 Image courtesy of Allen-Bradley, a Rockwell Automation business

10. Copyright © 2002 Delmar Thomson Learning MicroLogix 1500 Hardware Features Image courtesy of Allen-Bradley, a Rockwell Automation business

11. Copyright © 2002 Delmar Thomson Learning Installing the Processor Unit in the MicroLogix 1500 PLC Image courtesy of Allen-Bradley, a Rockwell Automation business

12. Copyright © 2002 Delmar Thomson Learning Simatic S7-200 Micro PLC Image courtesy of Siemens Energy & Automation, Inc.