Data Type: REAL, LREAL The data types REAL and LREAL are floating-point types according to IEEE 754. Floating-point types are necessary when using decimal numbers and floating-point numbers in decimal

Data Type: STRING Important In the case of Latin-1 encoding, the memory required for a STRING variable is always 1 byte per character plus one additional byte. For example, this results in 81 bytes in

Data Type: WSTRING According to the IEC 61131-3 standard, the data type WSTRING follows UCS-2 encoding. UCS-2 encoding means that a character is encoded with exactly the fixed length 2 bytes. UCS-2 co

Data Type: BIT The data type BIT is valid only in structures for the declaration of structure members or in a function block for the declaration of variables. A BIT variable can have the values TRUE (

Data Type: POINTER TO A pointer stores the memory address of objects, such as variables or function block instances, at runtime. Syntax of the pointer declaration: <pointer name>: POINTER TO <data typ

Data Type: REFERENCE TO Important With compiler version >= V3.3.0.0, references are initialized (at 0). Important If a reference refers to a device input, then the access is applied as write access. W

Data Type: ARRAY OF An array is a collection of data elements of the same data type. Single and multi-dimensional arrays of fixed or variable length are supported. One-dimensional array of fixed lengt

Enumeration An enumeration is a user-defined data type composed of a series of comma-separated components (enumeration values) for declaring user-defined variables. You declare an enumeration in a DUT

Alias A data type alias is the declaration of a user-defined data type with which an alternative name for a basic type, data type, or function block is generated. You make the type declaration of an a

Datatypes ¶ Constants (GVL) ERRNO (Enum) Modes (GVL)