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Startup and validation
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Figure 4-52 Selecting diagnostic/management variables
Once you have created all of the necessary variables, create the program for the selected
POU, see Section 4.15.7 .
4.15.7 Creating a safety-related program
Safety-related example
program
The safety-related example program in Figure 4-53 on page 130 involves safe logical AND-
ing of two input variables. The result of the ANDing is connected to an output variable. The
input/output variables are connected to process data in due course.
In addition, all the variables from the “Exchange” variable group that were created earlier
(see Figure 4-48 on page 125 ) are connected to the corresponding exchange variables that
were created earlier.
Creating a program To create a program, proceed as follows:
• Select the program editor.