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 14

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 |

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

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: 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

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 (