Mitsubishi Electric MELSEC iQ-R Series User Manual page 72

Setting method
1.
Configure the network in ring topology.
2.
Set "Network Topology" to "Ring" in "Basic Settings" of the master station.
Parameter setting and network configuration operation
Network topology
setting
( Page 102 Network
Topology)
Ring topology
Line/Star
If a station for which no parameters are set exists in a ring topology, the station does not perform a data link. In
such a case, a loopback occurs at the adjacent station.
1 FUNCTIONS
70
1.5 RAS
Actual connection status
Ring topology
Normal operation
Data link error
• The ERR LED on the master station
turns on.
• "60H: Illegal ring connection (master
station only)" is stored in 'Cause of
data link stop' (SW0049).
Line topology
Start cyclic transmission.
• The LED indication of the link-down
port in the loopback station is turned
off of the SD/RD LED and is turned on
of the L ER LED.
• 'Loopback status' (SB0065) turns on
in the master station.
• The station number of the loopback
station is stored in 'Loopback station
number 1' (SW0070) and 'Loopback
station number 2' (SW0071).
• In the network map of the CC-Link IE
TSN/CC-Link IE Field diagnostics, the
topology is displayed as line topology.
Normal operation
Star topology or coexistence of
line and star topologies
Data link error
• The ERR LED on the master station
turns on.
• "60H: Illegal ring connection (master
station only)" is stored in 'Cause of
data link stop' (SW0049).
Normal operation