Check if the slave side can accept communication when the slave is connected to the master.
For details about the setting screen, refer to the setting guide.M.24.3.2 Peripheral Settings - Slave diagnostics
Go to offline mode and touch [Peripheral Settings] on the item changeover switch.
[Peripheral Settings] screen opens. Touch [I/O Driver] and then [CANopen Driver].
[I/O Driver] screen opens. Touch [Slave Diagnostics].
[Slave Diagnostics] screen opens. Touch to check the status of selected slaves. The numbers of slaves that are in the selected status are highlighted. (Example, One module is operating)