Omron SYSMAC CP Series, Руководство пользователя

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4-15
4 Understanding Programming
CP2E CPU Unit Software User’s Manual(W614)
4-4 Pr
o
g
ram
m
in
g In
struction
s
4
4-4-2 Oper
and
s
Operands specify preset instruction parameters that are used to specify I/O memory area contents or
constants. Operands are given in boxes in the ladder programs.
Addresses and constants are entered for the operands to enable executing the instructions.
Operands are classified as source, destination, or number operands.
Example:
Operands are also called the first operand, second operand, and so on, starting from the top of the
instruction.
4-4-2 Operands
Operand type
Operand
symbol
Description
Source oper-
and Specifies the address of
the data to be read or a
constant. S Source oper-
and Source operand other than control
data (C)
C Control data Compound data in a source operand
that has different meanings depend-
ing on bit status.
Destination
operand
(results) Specifies the address
where data will be writ-
ten. D
−
Number Specifies a particular
number used in the
instruction, such as a
subroutine number. N With numbers, it is not possible to specify an address
for indirect specification (except for jump instruction
numbers).
MOV
&0
D0
S (so u rce)
D (destination)
SBS
2
N (n u m b er)
MOV
#0
D0
First operand
Second operand