Comparing communication efficiencies — Modbus and DNP3

March 20, 2010
This Control Microsystems white paper compares the efficiency of two SCADA protocols: Modbus and DNP3. The author finds that by using DNP3 it is possible to significantly reduce communication bandwidth, allow more devices to be added to the system, and add new functionality to devices, such as time stamping.
The white paper does not consider vendor-specific commands that may be used to collect historic data. This ensures a fair comparison that would work equally well with any vendor’s product.Download white paper