Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 202)

Chapter 11
Using Data Handling Instructions
11–19
The value at source A is ORed bit by bit with the value at source B and then
stored in the destination. (This instruction differs from the OR input
instruction discussed in chapter 8.)
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:
S0/0 Carry (C) always resets.
S0/1 Overflow (V) always resets.
S0/2 Zero (Z) sets if result is zero; otherwise resets.
S0/3 Sign (S)
sets if result is negative (most significant bit is set)
otherwise resets.
Entering the Instruction
You enter the instruction from within the program monitor functional area.
P 0 0 0 O R S R C A
2 5 5
P 0 0 0 O R S R C B
N 0 1 0 0
P 0 0 0 O R D E S T
N 0 1 0 0
OR
BITWISE INCLUS OR
Source A
255
Source B N7:0
100
Dest N7:0
100
Execution Times (
µ
sec) when:
True False
33.68 6.78
Ladder representation:
Or (OR)
9
To enter the function code, press:
ENT
ANB
0 1
FUN