Mitsubishi Electric MELSEC iQ-R Series User Manual page 55

Connecting/disconnecting a cable and powering off/on a device
When the operations listed below are performed, the following will occur depending on the firmware version of the control
station.
Network configuration
Star topology
Line topology, ring topology
■When the firmware version of the control station is "05" or later
The actual network configuration and the network map of the CC-Link IE Controller Network diagnostics may be a mismatch.
Whether mismatch is occurred or not can be checked using 'Network configuration mismatch occurrence status' (SB0098).
When using a ring topology, the following may be occurred.
• The station number of the loopback station cannot be detected correctly.
• Even if a switching hub is used, data link does not stop.
The actual network configuration and network map can be matched by executing the network map update of
the CC-Link IE Controller Network diagnostics. ( MELSEC iQ-R CC-Link IE Controller Network User's
Manual (Application))
A data link error may be momentarily detected in all the stations since all stations on the network will be
reconnected when executing the network map update.
■When the firmware version of the control station is "04" or earlier
A data link error may occur in all the stations.
Connected station numbers
Do not duplicate station numbers. Data link may be stopped when the station number is duplicated.
Operation
• Powering off and on a normal station or switching hub
• Connecting/disconnecting an Ethernet cable connected to the switching hub
• Disconnecting an Ethernet cable from a normal station and connecting it to another normal station or a switching hub
• Disconnecting more than 9 stations, or half the number of normal stations or more in the system
• Changing the network topology when adding a normal station
• Simultaneously powering off/on multiple stations
• Simultaneously connecting/disconnecting Ethernet cables to/from multiple stations (When a data link faulty station
returns, a data link error will occur in all the stations.)
• Disconnecting more than 9 stations, or half the number of normal stations or more in the system
• Changing the network topology when adding a normal station
5 SYSTEM CONFIGURATION
5.2 CC-Link IE Controller Network Configuration
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