Remote Monitoring Application based on Modbus and China Unicorn 3G

Abstract__In China traditional methods of building Modbus
remote monitoring system have some drawbacks. They are
tightly dependent on telephone lines if wired communication was
used; transferring speed is limited when using wireless
technology like GPRS; Proprietary interfaces make it hard to
reuse software design and new information island may be formed.
So a new architecture for Modbus remote monitoring application
was presented by this paper to solve the problems. 3G Gateway
provides Modbus network with Internet accessing capability.
Process data can be sent to LAN Gateway through 3G Gateway.
LAN Gateway gets the process data and forward to OPC server.
Then remote monitoring applications can read/write data from
Ito OPC server easily using standard OPC interfaces. A prototype
system was implemented in laboratory. The system is in
initial phase now, but it proved the technique feasibility of the architecture.