Lab #7, Working with Serial Data page 1 of 13 MFET 374 Manufacturing Integration I Spring 2010 Laboratory Assignment #7 Working with Serial Data Objectives: After completing this assignment, you will understand how to read bar code data into the ControlLogix PLC using RS-232 serial communications. You will also learn how to configure and use Allen-Bradley’s 2755-DS/DD bar code reader. In addition, this assignment will provide an opportunity to use PLC state machine programming. Background: Assumptions: It is assumed that you have: •Configured the bar code decoder as described in the document: Configuring Allen-Bradley’s Bar Code Decoder. •Properly aligned scanner A with the pallet’s bar code label. •Read Chapter 17 in the manual: Logix5000 Controllers General Instructions Reference Manual.Documentation: It is assumed that your Instructor has delivered the following presentations: •Introduction to Serial Communications •The RS-232 Serial Interface In addition, the following documentation has been posted on the MFET 374 web site: •Introduction to Allen-Bradley’s Bar Code Reader •Configuring Allen-Bradley’s Bar Code Decoder •Logix5000 Controllers General Instructions Reference Manual(from Rockwell Automation) Communications Cables: In this assignment we will use the prefabricated RS-232 cables located at each drop line.
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