Справочник Пользователя для Mitsubishi Electronics A1SJ71AR23Q
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2.1 Overall System Configuration
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SYSTEM CONFIGURATION
(2) MELSECNET/B data link system
MELSECNET/B data link system is a system which connects the master station and
slave stations (local station and remote I/O station) via a shielded twisted pair cable.
slave stations (local station and remote I/O station) via a shielded twisted pair cable.
• Up to 31 local and remote I/O stations in total can be connected to one master
station for the second tier.
• Up to 31 local and remote I/O stations in total can be connected to one master
station for the third tier.
POINT
A local module cannot be the master station or a remote I/O station since it is a
module dedicated to a local station.
module dedicated to a local station.
Figure 2.2 MELSECNET/B data link system
Local station
Master station
Second tier
No.1
Shielded twisted pair cable
Station that can mount
local module
local module
No.3
No.2
No.4
No.1
No.3
No.2
No.4
Third tier
Shielded twisted pair cable
Local station
Local station
Master station
Remote I/O
station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
Local station
No.n (n 31)
No.n (n 31)