Using CitectSCADA > Tagging Process Variables

Tagging Process Variables

You need to assign a variable tag to each I/O Device variable that CitectSCADA uses in your runtime system. To define your variable tags, you declare them in the variable tag database. The variable tag becomes a label, used to reference the data value of the I/O Device register at the specified address. Using labels has several benefits:

You need to define your variables as a specific data type. The most common variables supported by I/O Devices are digital and integer. CitectSCADA also supports real, string, byte, bcd, long, and longbcd data types.

After you have defined your variable tags, you can use them to:

The most common variables supported by I/O Devices are digital and integer variables, although some I/O Devices support other numeric variables and strings.

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