Mitsubishi Electric RD78G4 User Manual page 52

Check item
Is any Ethernet cable disconnected?
Is the network in the ring topology configured?
Has the time synchronization source station been
reset?
Is the time synchronization source station turned
off?
Is the time synchronization source station
operating normally?
Has any other station been reset?
Are other stations turned off?
Are other stations connected to the Motion module
operating normally?
Is a network topology with restrictions used for
connection?
Are station Nos. unique?
Is the IP address duplicated with another station?
Are 65 or more slave stations connected?
Are Ethernet devices properly connected to a
network line?
Is the IP address of the slave station blocked by
the IP filter setting of the master station?
Is the IP address of the master station blocked by
the IP filter setting of the slave station?
Are time synchronization devices with time
synchronization priority of 0 to 15 connected?
3 TROUBLESHOOTING
50
3.1 Checking with LED
Action
Replace the Ethernet cable.
Configure the network to avoid the ring topology.
• Since a station is temporarily disconnected after switching the time synchronization source, wait for it to
return.
• Avoid unnecessary disconnections or returns in a station that is the time synchronization source.
Check the manual of the module used for the time synchronization source station.
• Avoid unnecessary reset, since a station is disconnected while resetting.
• Start other stations.
Power on other stations.
• Check if the modules on the other stations are performing data link using CC-Link IE TSN/CC-Link IE
Field diagnostics. ( Page 54 Checking the Network Status)
• Check the operation status of modules on other stations. ( User's manual for the module used)
Correct the wiring. (MELSEC iQ-R Motion Module User's Manual (Startup))
Change the duplicated station No..
Change the IP address of the duplicated station.
Change the connection of the slave stations to 64 stations or less.
Correct the mixed structure of the Ethernet device. (MELSEC iQ-R Motion Module User's Manual
(Startup))
Correct the "IP Filter Settings" under "Application Settings".
Remove time synchronization devices with time synchronization priority of 0 to 15, or change the priority
setting to between 16 and 255. ( Manual for the time synchronization devices used)