Mitsubishi Electric MELSEC iQ-R Series User Manual page 36

CC-Link IE TSN/CC-Link IE Field diagnostics
If operations such as the following are performed, the actual network configuration and the network map of the CC-Link IE
TSN/CC-Link IE Field diagnostics may be a mismatch.
Network configuration
Star topology
Line topology
The actual network configuration and network map can be matched by executing the network map update of
the CC-Link IE TSN/CC-Link IE Field diagnostics. ( MELSEC iQ-R CC-Link IE TSN User's Manual
(Application))
A data link error may momentarily occur in all the stations and outputs of the connected slave stations may
turn off since all stations on the network will be reconnected when executing the network map update. Ensure
that the output data is held, if necessary. (Page 34 Output hold when a data link error occurs)
Output hold when a data link error occurs
Setting the following to "Hold" allows holding the outputs when a data link error occurs.
[Navigation window]  [Parameter]  [Module Information]  Target module  [Application Settings] 
[Supplementary Cyclic Settings]  [I/O Maintenance Settings]  [Data Link Error Station Setting]
5 SYSTEM CONFIGURATION
34
5.3 Precautions for System Configuration
Operation
• Powering off and on a slave station or switching hub
• Connecting/disconnecting an Ethernet cable connected to the switching hub
• Disconnecting an Ethernet cable from a slave station and connecting it to another slave station or a switching hub
• Disconnecting more than 9 stations, or half the number of slave stations or more in the system
• Changing the network topology when adding a slave 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 slave stations or more in the system
• Changing the network topology when adding a slave station