The possible causes are as follows.
- Incorrect setting with a personal computer or an Ethernet interface module
Check the IP address, network number, station number, and other settings.
- Improper condition of the HUB or LAN cable
Check the connection of the LAN cable or the HUB for the power discontinuity.
- Incorrect setting of the communication setting utility
Check if the settings of the Ethernet interface module and the settings of the communication setting utility match.