Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 167)

Using Data Handling Instructions
9–19
Or (OR)
The value at source A is ORed bit by bit with the value at source B and then stored
in the destination.
Truth Table
Dest = A OR B
A B Dest
0 0 0
1 0 1
0 1 1
1 1 1
Source A and B can either be a word address or a constant; however, both sources
cannot be a constant. The destination must be a word address.
Updates to Arithmetic Status Bits
With this Bit: The Controller:
S:0/0 Carry (C) always resets.
S:0/1 Overflow (V) always resets.
S:0/2 Zero (Z) sets if result is zero; otherwise resets.
S:0/3 Sign (S)
sets if result is negative (most significant bit is set) otherwise
resets.
Programming
Execution Times
(
µ
sec) when:
True False
33.68 6.78
OR
BITWISE INCLUS OR
Source A
Source B
Dest