IEC 61131-3 Subrange Type

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A subrange type restricts the range of an existing type. For example:

    Current : INT( 0..45 );

In Fernhill SCADA, subrange types are a declaration of intent. Fernhill SCADA does not restrict the value of subrange types to the limits implied by the declaration.

Standards Compliance

IEC 61131-3 Second Edition: Table 12.3.

IEC 61131-3 Third Edition: Table 11.3.

Further Information

Derived Data Types

To learn about other derived data types, for example ARRAY.

Elementary Types

To learn about the built-in elementary types for example REAL, or INT.

Common Elements

To learn about other common language elements.


For the meaning of terms used in Fernhill SCADA.