Learning Outcomes and Assessment Criteria:
LO1 Describe the design and operational characteristics of a PLC system
P1 Describe the key differences of PLC types and configurations, and their typical applications.
P2 Determine the types of PLC input and output devices available.
P3 Describe the different types of communication links used with PLCs.
M1 Explain the different types of PLC programming languages available.
D1 Analyse the internal architecture of a typical PLC to determine its operational applications.
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Describe the design and operational characteristics of a PLC system
Assignment Brief and Guidance:
Scenario
You are a junior engineer working for an automation company (4DZ Controls). A new client has approached your company wishing to upgrade their old relay logic based systems controlling some production lines. The client’s electricians are looking at two types of Allen-Bradley Programmable Logic Controller (shown below) however they have little or no experience with them and need some technical advice. The client would like to commission a descriptive but easy to read report to help them make the best decision before they invest.
The client has emailed you some points that the report must include.
- A clear description between the two types shown, what are their applications? are there any other types of PLC available?
- Why does the architecture of PLCs make it the obvious choice for automation and process control? Why are they more suitable than a microcomputer? Do PLCs have any limitations?
- What type of inputs and output interfaces do the two types of PLC offer?
- Can PLCs communicate with other devices? If so provide description of the communication links available.
- The electricians have been advised they should they be using one of the IEC6113 approved languages? Is this advisable? If so provide and explanation what the languages are, how do they differ, advantages and disadvantages etc. 4 Assignment Brief (HTQ) Higher Nationals – Assignment Feedback
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