Mitsubishi Electric AJ71C24-S6 User Manual page 16

1. GENERAL DESCRIPTION
MELSEC-A
1 .I .2
System configuration and the number of stations 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. (*I)
When the connection ratio is 1: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 comouter and
designated PC CPU stations.
This link system is called a multidrop link system.
Computer
,
----
m$
U
m a
U
m d - - - m
U
u
AJ71 C24
(Station
0)
AJ71C24
(Station
1)
A J 7 1
C24 (Station 2) AJ71C24
(Station
31)
Max. 32
stati o ns
(Number of PC CPU stations)