Mitsubishi Electric MELSEC iQ-R Series User Manual page 52

■Ring topology
The network is configured into a ring using Ethernet cables. A switching hub is not required.
When an error occurs in a normal station, data link can be continued with the stations that are operating normally.
For the RJ71EN71, ring topology is available only when "CC-Link IE Control" is selected as network type for P1 connector.
(1)
(1) Control station
Station number and connection position
Modules can be connected in any order regardless of the station number.
(1) (2)
(1) Station No.1
(2) Station No.4 (control station)
(3) Station No.3
(4) Station No.2
Cascade connection
Cascade connection of the switching hub is available up to 20 levels.
5 SYSTEM CONFIGURATION
50
5.2 CC-Link IE Controller Network Configuration
(3) (4)