Publication 1763-RM001C-EN-P - October 2009
212
Logical Instructions
Addressing Modes and File Types can be used as shown in the following
table:
Updates to Math Status
Bits
After a logical instruction is executed, the arithmetic status bits in the
status file are updated. The arithmetic status bits are in word 0 bits 0-3 in
the processor status file (S2).
Logical Instructions Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page 82.
Parameter
Data Files
Function Files
(1)
CS - Comms
IO
S -
I/O
DL
S
- D
a
ta
L
o
g
Address
Mode
(2)
Address Level
O
I
S
B
T,
C
, R
N
F
ST
L
MG,
PD
RI/R
IX
PL
S
RTC
HS
C
PTO, PWM
STI
EII
BH
I
MMI
LC
D
Imme
diate
Di
re
c
t
Indir
e
c
t
Bi
t
Wo
rd
Long
W
o
rd
Eleme
n
t
Source A
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Source B
(3)
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Destination
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
(1) PTO and PWM files are valid for MicroLogix 1100 BBB unit.
(2) See Important note about indirect addressing.
(3) Source B does not apply to the NOT instruction. The NOT instruction only has one source value.
IMPORTANT
You cannot use indirect addressing with: S, ST, MG, PD,
RTC, HSC, PTO, PWM, STI, EII, BHI, MMI, CS, IOS, and
DLS files.
Math Status Bits
With this Bit:
The Controller:
S:0/0
Carry
always resets
S:0/1
Overflow
always resets
S:0/2
Zero Bit
sets if result is zero, otherwise resets
S:0/3
Sign Bit
sets if result is negative (MSB is set), otherwise resets
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
