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Chapter 7: Sequential Function Charts LogicPro User’s Guide

76 Watlow Anafaze Doc.# 28002-00 Rev 3.00

Assigning Variables to Transitions

Transition conditions must take the form of a single

expression. A Transition condition can be a variable that

allows the program to continue once the variable value is

greater than 0. It could also be one or more variables related

by Boolean operators resulting in a Boolean true or false

result. Any integer value greater than 0 is considered true.

The following list of operators, shown in Table 7.2, may be

used in the Transition condition expression:

Table 7.2 Transition Condition Expressions

To assign a logical condition to a Transition:

1. Select the [Selector] tool.

2. Double-click on the Transition to which you want to

assign a condition. The Transition Condition dialog

box appears.

3. Select a variable for the transition by selecting the

appropriate checkbox and double-clicking the variable

name in the list.

4. If the condition expression needs an operator, press the

Operator List button on the dialog box. Add the

operator by double-clicking it.

Operator Symbol Function

* Times

/ Divided By

+ Plus

- Minus

>= Greater Than or Equal To

> Greater Than

<= Less Than or Equal To

< Less Than

== Equals

!= Not Equal To

! Not

&& And

|| Or

&&! And Not

||! Or not

( Left Parenthesis

) Right Parentheses

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Watlow LogicPro Manual de usuario Pagina 92