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Application instructions
3
SEQUENCE PROGRAMMING
3.27 Application instructions
Application instructions are used when special processing is required.
3.27.1 Logical Operation Instructions
(1) The logical operation instructions are instructions which perform the logical
operations such as logical add and logical product.
(2) The logical operation instructions are available in the following 10 types.
Classification
Instruction
Symbol
Classification
Instruction
Symbol
Classification
Instruction
Symbol
Logical
product
WAND
Exclusive OR
WXOR
2’s
complement
(Sign reversal)
NEG
WANDP WXORP NEGP
Logical add
WOR
Exclusive
NOR
WXNR
WORP WXNRP
REMARKS
The logical operation instructions perform the following processings in units of one bit.
Classification Processing
Operation
Expression
Example
ABY
Logical product
Set to 1 only when both inputs A
and B are 1. Set to 0 otherwise.
Y=A•B
000
010
100
111
Logical add
Set to 0 only when both inputs A
and B are 0. Set to 1 to 1
otherwise.
Y=A+B
000
011
101
111
Exclusive OR
Set to 0 when inputs A and B are
equal. Set to 1 when they are
different.
Y=A
•B+A•B
000
011
101
110
Exclusive NOR
Set to 1 when inputs A and B are
equal. Set to 0 when they are
different.
Y= (A
+B) (A+B)
001
010
100
111