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An Identifier is used to name different elements within a program. For example: a Variable Declaration, a Derived Data Type, or a Function.

Identifiers must conform to these rules:

Further Information

Common Elements

To learn about other IEC 61131-3 Common Elements.

Character Codes

For a list of all Unicode character codes used in IEC 61131-3 code.


For the meaning of terms used in Fernhill SCADA.