Rockwell Automation Publication 1756-RM003N-EN-P - October 2011 319
Move/Logical Instructions (MOV, MVM, BTD, MVMT, BTDT, CLR, SWPB, AND, OR, XOR, NOT, BAND, BOR, BXOR, BNOT) Chapter 7
Bitwise OR (OR)
The OR instruction performs a bitwise OR operation by using the bits in Source A and
Source B and places the result in the Destination.
Operands:
Relay Ladder
Structured Text
Use OR as an operator within an expression. This expression evaluates sourceA OR
sourceB.
See Structured Text Programming
for information on the syntax of expressions within
structured text.
Function Block
Operand Type Format Description
Source A SINT
INT
DINT
Immediate
Tag
Value to OR with Source B
A SINT or INT tag converts to a DINT value by zero-fill.
Source B SINT
INT
DINT
Immediate
Tag
Value to OR with Source A
A SINT or INT tag converts to a DINT value by zero-fill.
Destination SINT
INT
DINT
Tag Stores the result
Operand Type Format: Description
OR tag FBD_LOGICAL Structure OR structure
dest := sourceA OR sourceB