This module is intended to familiarize the student with the most important aspects of the PLC's central processing unit with a focus on the ControlLogix processor. Topics covered in the module include memory devices, memory storage, and data processing as well as an introduction to tag-based memory. In addition to covering memory utilization and protection, the module also provides detailed information on multiprocessing and PLC scan functions.
Learning Outcomes:
Upon completion of this module the student will be able to:
- Explain the difference between a CPU and a MPU.
- Name the four basic functions of a CPU.
- Differentiate between volatile and nonvolatile memory.
- Define "flash memory".
- Describe the main purpose of the scan cycle in a PLC.
- Name two types of PLC memory protection.
- List the major features of Controllogix controllers.
- Explain the purpose of tag-based memory
- Describe the difference between a project and a task.
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