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Programmable Logic Controllers II - Siemens

ET 250

Programmable Logic Controllers II - Siemens

ET 250

Course Description

Prerequisite: ET 122. Builds on the skills developed in an introduction to PLCs and applies the concepts learned to a Siemens Programmable Logic Controller (PLC) system. Explains the hardware platform for the Siemens PLC along with the logic elements that comprise the instruction set used for programming the logic. Applies material taught in lecture in the laboratory through the use of PLC training systems. Constructs control circuits from drawings, analyzes the process, makes revisions as necessary, and evaluates the proper operation of the PLC circuit. Credit may be earned in ET 250 or SKET 250 but not both. (30-30)

Outcomes and Objectives

Recognize and explain the operation of hardware in Siemens PLC system.

Objectives:

  • Identify and describe the operation of the PLC input and output cards.
  • Identify and describe the functions of the CPU in a PLC system.
  • Identify and describe the operation of the power supply in a PLC system. Determine the proper sizing of a power supply to meet the power requirements of a PLC system
  • Configure, connect, and utilize a PC to communicate with the PLC processor.
  • Recognize and draw the schematic symbols for devices used in PLC circuits. Differentiate between different symbols, conventions, and terminology from wiring diagrams.
  • Explain the procedures required to properly install a PLC system.

Recognize and explain the instruction set used in Siemens PLC system.

Objectives:

  • Differentiate between data files and program files in a PLC.
  • Describe a PLC scan including the order of operation and the scan time required to perform all tasks.
  • Identify and describe the operation of basic logic elements in a PLC program.
  • Identify and describe the operation of times and counters in a PLC program.
  • Explain how program control elements allow the PLC to alter the normal execution of the PLC scan.
  • Describe the use and operation of math functions for performing calculations on data in PLC programs.
  • Differentiate between various forms of data manipulation techniques including the use of move instructions, shift registers, and file/word transfers.
  • Identify and describe the use and operation of a one shot instruction.
  • Differentiate between various data types.
  • Differentiate between bit and word instructions and data.

Demonstrate the ability to configure and use programming software.

Objectives:

  • Configure and utilize communication software to establish a connection between a PC and the PLC.
  • Create, edit, save, download, and upload programs.
  • Demonstrate the ability to make online program edits.
  • Demonstrate the ability to view and modify and the contents of words in the data file.
  • Demonstrate the ability to troubleshoot PLC logic programs.

Conduct laboratory experiments to reinforce lecture material.

Objectives:

  • State, explain, and comply with safety precautions when working on electrical equipment.
  • Construct control circuits using electrical devices and laboratory PLC equipment. Predict and analyze the proper operation of PLC circuits. Troubleshoot and make wiring modifications, if necessary, to obtain the desired results of the control schematic.
  • Evaluate the proper operation of the PLC program using programming software.
  • Design, program, and troubleshoot PLC circuits from a narrative description.
  • Develop troubleshooting techniques.