Relay Logic Design
In many cases, it is possible to design a relay logic diagram directly from the narrative description of a control event sequence. In general, the following suggestions apply to designing a relay logic diagram:
1. Define the process to be controlled.
2. Draw a sketch of the operation process. Make sure all the components of the system are present in the drawing.
3. Determine the sequence of operations to be performed. List the sequence of operational steps in as much detail as possible. Write out the sequence in sentences, or put them in table form.
4. Write the relay logic diagram from the sequence of operations.
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