Chapter 7 Creating a graphical program
80 CNT-SVP01C-EN
Editing program properties
The next step in writing a graphical program is to give the program a
name and define some basic properties of the program. The properties of
a program define how the program behaves. For example, Run Frequency
is a property that defines how often the program executes. It is good prac-
tice to set the program properties before you begin to write a new pro-
gram, but you can edit the properties at any time by opening the Program
Properties dialog box.
To select the appropriate method of program execution, ask yourself the
following questions:
• Is the program required to run at regular time intervals? If so, click
the Run Frequency option. Then specify the time interval in hours,
minutes, and seconds.
• Is the program required to run on demand? If so, use the Event Trig-
ger option to provide the program with a reference to a universal
input configured as a binary input or to a binary variable. When the
binary input or variable changes state, the program runs.
• Is the program required to run only when the Tracer MP580/581 pow-
ers on? In this case, click the Start-up option.
To edit program properties:
1. From the File menu, choose Program Properties. The Program Prop-
erties dialog box appears (Figure 51 on page 81).
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