Chapter 20 Network Configuration and Data Exchange Multiple nodes In a network, users can download parameters to multiple devices, upload parameters from multiple devices, and monitor multiple devices. Before users download parameters to multiple devices, upload parameters from multiple devices, or monitor multiple devices, they have to make sure that the devices are connected to an Ethernet network, the devices are assigned IP addresses, and the connection type that the driver uses is Ethernet. If the connection type that the driver selected uses is Ethernet, the system will carry out communication according to the IP addresses assigned to the devices in NWCONFIG.
Before the communication is carried out, users have to make sure that the IP addresses actually assigned to the devices are the same as the IP addresses set in NWCONFIG, and the networks actually created are the same as the networks created in NWCONFIG. Otherwise, an error will occur if the communication is carried out. NWCONFIG can also carries out communication through routing. Routing is a function provided by AH5x0 series CPU modules. It directs packet forwarding. Packet forwarding is the relaying of packets from their source toward their destination through intermediate nodes. In the figure below, the device which actually connects to the computer is AH-01.
If the computer wants to connect to AH-03, it can communicate with it through routing, and designates AH-01 as the first station. After the computer sends a command, the command is transmitted to AH-03 through AH-01 and AH-02. 20-7