This Driver can communicate with any FINS-compatible device through a Host Link port. That device can then process a given FINS command if it is the destination node, or relay the message to another device if it is not the destination node.

According to the Diagram of a FINS network figure on topic FINS Purpose, it is advisable to send a data request from the server computer to the PLC 4 device. This Driver builds a FINS data request message with the appropriate source and destination parameters in its header, encapsulates that message in a Host Link package, and sends it to the PLC 1 device. This device then examines the FINS message header and determines that node 2 (two) or network 2 (two), that is, the PLC 4 device, is the intended destination.

When referring to its routing tables, discussed shortly, the PLC 1 device determines that the message must be sent to the gateway device, PLC 2, to reach the destination node on network 2 (two). As the PLC 2 device is not on a Host Link network, the Host Link package is removed. The PLC 2 device, by its turn, sends the message to the PLC 4 device. This device then sends its response back to the server computer via PLC 1 and PLC 2 devices. The PLC 1 device wraps the FINS response in a Host Link package, which this Driver can recognize and process. Similar device objects could be created for devices PLC 1, PLC 2, PLC 3, and PLC 5.