The following are possible causes for communication not being established between the Certificate Configuration Tool for FX5-ENET and FX5-ENET.
(1) Connected to built-in Ethernet of FX5 CPU module.
⇒Certificate Configuration Tool for FX5-ENET must be connected to FX5-ENET.
(2) The firewall is not set.
⇒In Windows Defender Firewall, select [General] - [Operation] to allow connections from the properties of CertConfigTool (Certificate Configuration Tool for FX5-ENET). If multiple CertConfigTools are displayed, set all to allow connection.