For modbus serial devices you need to seperately install  EM X80 GW DTM which is a Gateway DTM. For such architectures you need to install a gateway DTM because the PC running Unity Pro DTM creates a link between the following parties: the control network, that is the computer running a Modbus TCP Comm DTM in a standard FDT Frame Application (compliant with the FDT Specification V1.2.1), and any device which is delivered with a Device DTM (Device Type Manager) and which supports the Modbus Serial protocol (for example ATV 71). The EM X80 GW DTM provides the following functions:
1. Configuring the address of the Modbus Serial master (rack, slot, channel of the Modbus module that is used as master for communications)
2. Addressing of the Modbus slave devices, that are the target devices (for example ATV 71)
3. Displaying diagnostic information on the communication status
4. Logfile creation
5. Configuration of the scan procedure for Modbus target devices

Released for: Schneider Electric India