Mitsubishi Electric MELSEC iQ-R RD78G4 User Manual page 38

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 Motion Module User's Manual
(Network))
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 36 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
36
5.3 Precautions for System Configuration