Mitsubishi Electric MELSEC iQ-R Series User Manual page 50

• When "Communication Mode" is set to "Multicast" and the communication speed of the master station is set to "1Gbps",
slave stations with different communication speeds of 1Gbps and 100Mbps cannot be connected on the end side via a
switching hub.
Multicast
No.0
Class B (1Gbps)
No.1
Class A (100Mbps)
No.0: Master station
No.1, No.2, and No.3: Remote station
Class A: Authentication Class A device
Class B: Authentication Class B device
■Coexistence of line and star topologies
Line and star topologies can be mixed in the same network configuration.
• When the master station with a communication speed of 1Gbps and a remote station with a communication speed of
100Mbps exist in the structure, set "Communication Period Setting" to "Low-Speed" for the remote station with a
communication speed of 100Mbps.
No.0
Class B (1Gbps)
No.0: Master station
No.1: Local station
No.2, No.3, and No.4: Remote station
Class A: Authentication Class A device
Class B: Authentication Class B device
■Ring topology
In a "Mixture of Authentication Class B/A or Authentication Class A Only" system configuration, the network cannot be
configured in a ring topology.
5 SYSTEM CONFIGURATION
48
5.2 Structure of Authentication Class B/A Devices and Ethernet Devices
No.2
Class A (100Mbps)
General-
purpose hub
No.3
Class A (1Gbps)
No.1
General-
Class B (1Gbps)
purpose hub
General-
No.2
purpose hub
Class A (100Mbps)
Low speed
No.3
Class A (100Mbps)
Low speed
No.4
Class A (100Mbps)
Low speed