Rockwell Automation 1761-HHP-B30 MicroLogix 1000 with Hand-Held Programmer (HHP) - Manual (Page 203)

Chapter 11
Using Data Handling Instructions
11–20
The value at source A is Exclusive ORed bit by bit with the value at source B
and then stored in the destination.
Truth Table
Dest = A XOR B
A B Dest
0 0 0
1 0 1
0 1 1
1 1 0
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 X O R S R C A
2 5 5
P 0 0 0 X O R S R C B
N 0 1 0 0
P 0 0 0 X O R D E S T
N 0 1 0 0
XOR
BITWISE EXCLUS OR
Source A
255
Source B N7:0
100
Dest N7:0
100
Execution Times (
µ
sec) when:
True False
33.64 6.92
Ladder representation:
Exclusive Or (XOR)
ANB
0
ENT
1
FUN
To enter the function code, press:
1