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ARTEMIS
3. Operation overview
3.1. Background
In the BiDi-Bus the maximum number of participants in one level or
sublevel is limited to 32 nodes (e.g. interface, booster, accessory
decoder, feedback modules) for technical reasons.
In total up to 4 levels are permitted. With special nodes (the bus
bridges or so-called "hubs") further sublevels can be added in the top 3
levels, again with 32 nodes each. Theoretically, about 1 million nodes
are possible in one system - a number that is certainly not exhausted in
practice.
The hierarchical structure enables the structured wiring of the system.
This results in various advantages:
Depending on the system concept, the wiring of individual system
parts or component groups can be clearly grouped in sublevels.
The extension of a layout or the addition of additional stationary
components is very easy. Changes and additions remain permanently
traceable.
Principle structure of a BiDiB-controlled system
The system comprises up to 4 levels with a maximum of 32 nodes each.
In the top 3 levels, additional sub-levels can be inserted with the help
of hubs, which can also have up to 32 nodes each. Hubs are no longer
permitted on the 4th level.
Level 1 contains the interface which establishes the connection to the
PC and the control software. In the first level up to 31 additional nodes
can be inserted (the interface counts as one of 32 possible nodes).
The hubs technically represent 2 nodes, one in the main level to which
they are assigned and one in the sublevel which is set up with their
help.
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