A failure influence on parameters of real-time system with two buses

Abstract

The paper refers to the time parameters of transmission in industrial systems that use two buses. Applying the systems with two buses makes sense only if it is possible to control the transmission all the time, and make modifications and reconstruction of transmission scenario in case of a failure. The paper presents the results of empiric research into testing software algorithm for failure detection of transmission line and network node in industrial communication system. After implemented this algorithm in PLC the results referring to measurements of duration of basic transaction in a system and duration of failure detection on communication buses were presented. The authors tried to clarify whether a failure detection in two buses transmission can have an influence on the delays of transmission. The paper consists of description of a test bench for time parameters measurements, the test results and conclusion.