If I understand correctly, you want a running display to scan a file to receive updated control parameters, correct?
If so, then no, there are no built-in functions to read data from a file while running. If I had to do this, I would use an Ethernet-to-CAN bridge/adapter and craft a little script sitting on the server or a nearby PC to pull the server and push out a period CAN message. Then you can use the built-in CAN functions on the display to extract and sanity-check the incoming data.