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Workshop PG5 Exercise Chapter 7<br />

General questions 1 to 7<br />

1. Which of the following instructions are executed only if the ACCU is<br />

high?<br />

SET RES COM INC STH<br />

2. How can you set / reset and flip the ACCU state?<br />

3. Load the state of the Error-Flag into the ACCU<br />

4. Write a program that corresponds to these two ladder diagrams<br />

Example 4.1: Example 4.2:<br />

I 1 * I 2 + I 3 = O32<br />

I 1 + I 3 * I 2 = O32<br />

5. What would the result in example 4.2 be, if the result of the first logic<br />

combination wouldn’t be saved in a flag:<br />

STH I 1<br />

ORH I 3<br />

ANH I 2<br />

OUT O 32<br />

Instead of =><br />

STH I 1<br />

ORH I 3<br />

OUT F 0<br />

STH F 0<br />

ANH I 2<br />

OUT O 32<br />

Draw the solution as electrical drawing.<br />

© Saia-Burgess Controls Ltd. Page 7E-1

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