Logical Operation

AND(&) Operator

AND Operator, or & Operator compares the bits of two operands. If the correlated bits are both 1, the result bit becomes 1.

Format: Expression1 AND Expression2 or Expression1 & Expression2
In Expression1 and 2, a constant, PLC Device variable (the value that PLC Device has) and the Expressions listed in [Expressions] can be used.
Bit operation truth table

 Example

OR 연산자

OR Operator compares the bits between 2 operands. If any of the correlated bit is 1, the result bit becomes 1.

Format: Expression1 OR Expression2
In Expression1 and 2, a constant, PLC Device variable (the value that PLC Device has) and the Expressions listed in [Expressions] can be used.
Bit operation truth table

Example

XOR Operator

XOR Operator compares the bits between 2 operands. If one of the correlated bit is 1, the result bit becomes 1. But if both of the correlated bits are 1, the result will be 0.

Format: Expression1 XOR Expression2
In Expression1 and 2, a constant, PLC Device variable (the value that PLC Device has) and the Expressions listed in [Expressions] can be used.
Bit operation truth table

 Example

NOT Operator

NOT operator reverses the bits of the operand. If the bits of operand are 1, the result will be 0. Then if the bits of operand are 0, the result will be 1.

Format: NOT Expression1
In Expression1 and 2, a constant, PLC Device variable (the value that PLC Device has) and the Expressions listed in [Expressions] can be used.
Bit operation truth table

 Example