PROCEDIMIENTO PARA LA COMUNICACION TOLERANTE A LA FALTA BAJO ELEVADAS EXIGENCIAS DE TIEMPO REAL.

摘要

The communication procedure involves the use of a double-bus architecture with a redundant bus system. During fault-free operation, one bus acts as a process bus to carry all process data, while the other bus carries component status and other information. When one bus fails, the other bus acts as a watchdog bus and advises all network nodes of the fault. If a fault occurs on the process bus, all network nodes are switched over to the other bus system so that data transfer can then continue. A fault on the other bus does not cause any switch-over. All network nodes have two complete bus connections, comprising a communications CPU, a communications controller and a transceiver.