Declaring the Variables
There are a variety of methods available to declare variables. The following procedure illus
-
trates how to declare variables from the body of the FBD:
햲
Place input and output variables by right clicking the mouse in the work area. From the fol
-
lowing popup menu, select and place input and output variable tags onto the FBD as
shown below:
Alternatively, click on the toolbar button .
햴
Fill out the properties of the variable thus: Class: VAR_INPUT, Type: INT, as shown below:
Functions Functions and Function Blocks
6-4 MITSUBISHI ELECTRIC
햳 Declare the variable “Fahrenheit” by simply typing it into
the variable area:
Because this variable name has not yet been
defined in the header (LVL), a prompt dialogue
will be presented to choose Global or Local vari-
able, click
Define Local
.
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