But what if your Modbus device uses a serial link?
In this new video, Opto 22 Senior Applications Engineer Kyle Orman shows you how to groov your Modbus RTU devices.
You'll need a simple protocol gateway to translate protocols, in this case Modbus serial to Modbus/TCP. The one we've used here is the flexible FieldServer QuickServer.
Other gateways are available as well, but the QuickServer handles translation not just for Modbus but also for a number of protocols, including BACNet, which is used extensively in building management systems.