Attribute: no-exit The attribute suppresses the call of the FB_Exit method of a function block for a certain one of its instances. To do this you insert the attribute in the line before the declaratio

Attribute: obsolete The effect of this pragma is that a defined warning is displayed for a data type definition during compilation if the data type (structure, function block, etc.) is used in the pro

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: ADR The operator is an extension of the IEC 61131-3 standard. ADR yields the 32-bit address (or the 64-bit address, if possible) of its argument. You can pass this address to the manufacture

Operator: BITADR The operator is an extension of the IEC 61131-3 standard. BITADR yields the bit offset within a segment in a DWORD . Important The offset depends on whether the "Byte addressing" opti

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