Automating Manufacturing Systems - Process Control and ...

plc function ref - 34.20
34.1.6 Logical
AND, OR, XOR - AND, OR, eXclusive OR
Description:
Status Bits:
A
AND
BITWISE AND
Source A N7:0
Source B N7:1
Dest N7:2
These functions do basic boolean operations to the numbers in locations
A and B. The results of the operation are stored in Dest. These calculations
will be perform whenever the input is true. The functions are,
AND - Bitwise and
OR - Bitwise or
XOR - Bitwise exclusive or
C
V
Z
S
Registers: none
Available on: Micrologix, PLC-5
Carry - always 0
Overflow - always 0
Zero-setsiftheresultiszero.
Sign - sets if the MSB of the result is set
NOT - NOT
Description:
A
NOT
NOT
Source N7:0
Dest
N7:1
This function will invert all of the bits in a word in memory whenever the
input is true.
Status Bits:
C
V
Z
S
Carry - always 0
Overflow - always 0
Zero-setsiftheresultiszero.
Sign - sets if the MSB of the result is set
Registers: none
Available on: Micrologix, PLC-5