Communication with Motorola MOSCAD RTUs
Do you have an OPC Server for MOSCAD RTUs using the MDLC protocol?
Motorola has an FIU (Field Interface Unit) that is basically a Modbus to MDLC gateway. Others have used an FIU with their MOSCAD RTUs and TOP Server Modbus TCP for communications.
If implementing an FIU along with your MOSCAD RTUs is an option, you could use TOP Server Modbus Suite.