Operator ‘TRUNC_INT’ΒΆ

The IEC operator is used for converting the REAL data type into the INT data type. CODESYS takes only the integer part of the number.

Note

TRUNC_INT corresponds to the TRUNC operator in CoDeSys V2.3, and it is used automatically at this point when importing V2.3 projects. Note the change function of TRUNC.

If CODESYS cannot represent the input value by a DINT or INT, then the result of this function is undefined. The behavior of such input values is platform-dependent.

Hint

If the operand value for a type conversion operator is outside of the value range of the target data type, then the result output depends on the processor type and is therefore undefined. This is the case, for example, when a negative operand value is converted from LREAL to the target data type UINT.

Information can be lost when converting from larger data types to smaller data types.

Examples

Result in iVAR: 1

ST:

iVar := TRUNC_INT(1.9); (* Result: 1 *)

iVar := TRUNC_INT(-1.4); (* Result: -1 *)

See also