Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 12, Problem 1P
Explanation of Solution
Operations of drum switch:
The structure and operations of the given drum switch is as follows:
- To operate the contact blocks in the drum, the “pegs” are situated at the particular locations around the drum.
- The contacts which are associated with the “pegs” are closed and the contacts without pegs are opened when the drum gets rotated.
- The logical value “1” or “ON” is used to represent the peg existence and the logical value “0” or “OFF” is used to represent the peg non-existence.
Sequencer data table:
The equivalent sequencer data table for the four steps of the
| 0 | 1 | 0 | 1 | 0 | 0 |
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Chapter 12 Solutions
Programmable Logic Controllers
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