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Message System
Communication within the entire NEXUS system,
i.e. the transmission of commands and system statuses, is based on
messages. Base devices exchange messages via fibre-optic lines; however,
this message system oper-ates independently of the signal distribution.
The control computers are integrated into the message system, too.
Confirmation messages ensure a continuous update of all base devices
and user-interface computers.
Base devices and control computers regularly check their connections
during communication gaps using cyclical test messages. Thus, new
connections or breakdowns are immediately recognized and considered
during infor-mation updates.
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