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1 OVERVIEW
MELSEC-QnA
(3) Local station communication
The data communication between programmable controller CPUs can be
performed in N:N relationship with bit data (remote input RX and remote output
RY) and word data (remote register)
Master station
Remote input (RX)
Remote output (RY)
Remote register (RWw)
Remote register (RWr)
Local station
Remote output (RY)
Remote input (RX)
Remote register (RWr)
Remote register (RWw)
Local station
Remote output (RY)
Remote input (RX)
Remote register (RWr)
Remote register (RWw)
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
(4) Establishing high-speed transmission
When the transmission speed of 10Mbps is set, the link scan time
(communication time with the master station and remote station/local station) is
still at high speed, even when the maximum 64 stations are connected.
• Remote I/O (RX, RY) 2048 points ..................................................... 4 ms
• Remote I/O (RX, RY) 2048 points
+ remote register (RWw, RWr) 512 points................ 7 ms
(5) System configurations are possible, according to requirements.
(a) Transmission distance
The total extended distance depends on the transmission speed, but
connections can be made between 100 m (at 10 Mbps) and 1.2 km (at 156
kbps).
(b) Number of connected stations
A maximum of 64 stations, including remote I/O stations, remote device
stations, and local stations can be connected to one master station.
Up to 64 remote I/O stations, 42 remote device stations, and 26 local
stations can be connected. (Refer to Section 2.1.)