Attribute: monitoring The effect of this pragma is that you can monitor values of properties or function calls in the online view of the IEC editor or in a watch list. There are two possible attribute

Operator: ADD The IEC operator adds variables. Permitted data types: __UXINT | __XINT | __XWORD | BYTE | DATE | DATE_AND_TIME | DINT | DT | DWORD | INT | LDATE | LDATE_AND_TIME | LDT | LINT | LREAL |

Operator: AND The IEC operator is used for the bitwise AND of bit operands. When the input bits all yield 1, the output bit also yields 1; otherwise 0. Permitted data types: BOOL , BYTE , WORD , DWORD

Operator: LOG The IEC operator yields the base-10 logarithm of a number. The input variable can be any numeric basic data type, but the output variable must be the data type REAL or LREAL . Example 12

Object: Program A program is a POU that yields one or more values when executed. All values remain unchanged after program execution until the next execution. The call order of programs in an applicat

Variable: VAR Local variables are declared between the keywords VAR and END_VAR in the declaration part of programming objects. You have read-only access to local variables (externally via the instanc

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Static Analysis ¶ Note The CODESYS Professional Developer Edition provides a tool for static code analysis . A rule set is included for automatically checking the naming convention described above. Un

Parameterization with parameter lists ¶ Implementation Details The language model of a certain library in a certain version is loaded only once in a project. This means that if, for example, the libra

Parameter Handling ¶ There are several ways for supplying values (from the caller) to a function, a function block or its methods (the callee). These values are necessary to influence the implemented