1.
GENERAL DESCRIPTION
MELSEC-A
1
.1.2
System configurrtion
and
the number
of
daions
when
a
computer
link
system
is
constructed
A
computer link system using the dedicated protocol, no-protocol mode, or
bidirectional mode can be constructed by connecting the computer to the
PC
CPU
in
the ratios
of
1
:1,
l:n,
2:1, 2:n, and m:n. (*1)
When the connection ratio is
l:n
or 2:n, up to 32 PC CPU stations can be
tied to one link system.
When the connection ratio is m:n,
up
to 32 stations
of
computers and PC
CPU modules can be tied to one link system.
1)
When the connection ratio
of
the computer to the PC CPU
module is
1
:n:
This method
of
linking uses one computer and multiple PC CPU
modules for up
to
32
stations.
Data communications is executed between the computer and
designated PC CPU stations.
This link system is called a multidrop link system.
I
r---
AJ7lc24
(Mi&
0)
An1
c24
(stati&2)
An1
C24
(strrtio/n
31)
Max.
32
stations
(Number
of
PC
CPU
stations)
1-7
..
.
.
.
.
.
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