Auto declaring variables
In the previous chapters, we manually created variables. Manually creating variables is a common way of creating variables, but it is not the only way. CODESYS offers a simple tool for declaring variables called an Auto Declare tool. The tool is useful for declaring variables with data types that you may not be familiar with, creating a variable in a different file, and so on. The tool is also handy for assigning actual outputs, comments, and more for the variable.
The purpose of this tool is to help assist you in the creation of variables. However, this tool can easily be more trouble than it is worth. For the most part, it will be easier to declare a regular variable as we have been doing so far – that is, simply using the editor to write the variable’s code manually. However, if something is complex, in a different file, or you simply forgot the syntax, the tool can be of great value. In short, use the tool wisely and when necessary.
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