Automating Manufacturing Systems - Process Control and ...

plc software - 32.23
- design the product so that it is easy to manufacture
- use methods that are obvious, so that anybody can understand - this
makes workers portable and able to easily cover for others.
- use poke-yoke
- design tools to reduce the needs for guards.
32.9 REFERENCES
Kenner, R. H., “The Use of Simulation Within a PLC to Improve Program Development and Testing”,
Proceedings of the First Automation Fair, Philadelphia, 1990.
Paques, Joseph-Jean, “Basic Safety Rules for Using Programmable Controllers”, ISA Transactions,
Vol. 29, No. 2, 1990.
32.10 SUMMARY
• Debugging and forcing are signs of a poorly written program.
• Process models can be used to completely describe a process.
• When programming large systems, it is important to subdivide the project into
smaller parts.
• Documentation should be done at all phases of the project.
32.11 PRACTICE PROBLEMS
1. List 5 advantages of using structured design and documentation techniques.
32.12 PRACTICE PROBLEM SOLUTIONS
1. more reliable programs - less debugging time - more routine - others can pick up where you left
off - reduces confusion
32.13 ASSIGNMENT PROBLEMS
1. What documentation is requires for a ladder logic based controller? Are comments important?
Why?
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