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Examples
The following three examples demonstrate the three types of execution con-
trol possible with step programming. Example 1 demonstrates sequential
execution; example 2, branching execution; and example 3, parallel execu-
tion.
The following process requires that three processes, loading, part installa-
tion, and inspection/discharge, be executed in sequence with each process
being reset before continuing on to the next process. Various sensors (SW1,
SW2, SW3, and SW4) are positioned to signal when processes are to start
and end.
SW
1
SW 2
SW 3
SW 4
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Part installation
Inspection/discharge
The following diagram demonstrates the flow of processing and the switches
that are used for execution control.
Process
A
Process B
Process C
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Part Installation
Inspection/discharge
SW1
SW2
SW3
SW4
Example 1: Sequential
Execution
Step Instructions Section 5-18
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