Minimum bandwidth requirements

The slowest recommended network connection speed for System Platform for platform, history, and alarm communications is 128 kbps of dedicated bandwidth.

This is totally independent of communications between OPC/IO/Communication Driver and field devices (RTUs, etc.), which typically occurs over a different device network using RTU and/or other industrial protocols, often at slower data rates (i.e.: 56 kbps and lower).

Check ping times for remote nodes and consider improving the available bandwidth or reducing I/O polling frequencies for those nodes that exhibit very slow ping times. For information about using Ping for checking and diagnostics, see "Diagnostics" on page 266.