Mitsubishi A1SJ61BT11 User Manual page 20

1 OVERVIEW
Master
station
Master
station
(6) Link points
2048 points of remote input (RX), 2048 points of remote output (RY), and 512
points of remote register (RW) can be used for communication in one system.
For one remote station or local station, 32 points of remote input (RX), 32 points
of remote output (RY), and 8 points of remote register (RW) (RWw: 4 points,
RWr: 4 points) can be handled.
(7) System down prevention (Station cutoff function)
Because the system employs the bus method, even if there is a remote station or
local station which goes down due to power off, etc., it won't affect the
communication with other functioning remote/local stations.
Also, for the module using with the 2-piece terminal block, the module can be
replaced during data link.
Station No.1 Station No.3
Remote station Remote station
(occupies 2 stations) (occupies 1 station)
Faulty
station
Station No.1 Station No.3
Remote station Remote station
(occupies 2 stations) (occupies 1 station)
Station No.4
Local station
(occupies 1
station)
Remote station
(occupies 2 stations)
Data link continues
Station No.4
Local station
(occupies 1
station)
Remote station
(occupies 2 stations)
1 - 6
MELSEC-A
Station No.7
Local station
(occupies 4
Station No.5
stations)
Station No.7
Local station
(occupies 4
Station No.5
stations)