202
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 the 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
Loading
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
Loading
Part Installation
Inspection/discharge
SW1
SW2
SW3
SW4
The program for this process, shown below, utilizes the most basic type of
step programming: each step is completed by a unique SNXT(09) that starts
Example 1:
Sequential Execution
Step Instructions
Section 5-22