Rockwell-automation FactoryTalk View Site Edition Users Guide Manuel d'utilisateur télécharger pdf (Page 566)

FACTORYTALK VIEW SITE EDITION USER’S GUIDE

If the statement is true then the expression returns value1; if the statement is false then the

expression returns value2. Keep in mind that the statement is a mathematical equation and

true means a non-zero value, and false means zero.

Following is an illustration of the if–then–else structure:

Nested if-then-else

It is common to nest an if-then-else structure inside the then or else part of an if-then-

else structure.

Example 1: Nested if-then-else

This expression:

If statement1 Then value1

Else if statement2 Then value2

is interpreted in this way:

value2 value1

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Rockwell-automation FactoryTalk View Site Edition Users Guide Manuel d'utilisateur Page 566