Performance estimation of a token bus industrial local area network

A local area network (LAN) was developed to connect the distributed parts of power plant process control systems. The following requirements had to be met: fast transfer of short messages (alarms); transfer of long messages with high throughput; reliable transfer of data in harsh environments; and access to shared resources for all participants in process control. Performance measurements were carried out. Results indicate that in the network configuration of four stations, for maximum throughput of SDN (send data with no acknowledge) services the channel efficiency is 60%, while for SDA (send data with acknowledge) services it is 35%.<
>