Introduction to Industrial Automation

Figure 10.26  Object pointing and transporting system.

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Industrial Applications 

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405

If any operating accident happens, then the pressing of the pushbutton emergency stop causes a 

general discontinuation, regardless of the point at which the packaging process is running.

The packaging process refers to the complete execution of a packaging order including a triple 

of crates from all the produced products (e.g., n

1

, n

2

, and n

3

), depending on each customer’s desire. 

This means that after closing the switch RS

0-1

, the station will have to pack n

1

 crates with products 

from M

1

, n

2

 crates with products from M

2,

 and n

3

 crates with products from M

3

.

A PLC program for this industrial application should be parametric to n

1

, n

2

, and n

3

. As a first 

approach to the problem however, you are prompted to write the required program that imple-

ments a specific order such as (2, 1, and 3).