System Introduction
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1070 072 262-101 (01.09) GB
2.1.3
Fieldbus system INTERBUS
The open fieldbus system INTERBUS commonly connects all processing
peripherals with the entire common range of controllers. The serial bus cable
is used to network sensors and actuators, to control machines and system
parts, to network manufacturing cells and interface higher-level systems,
like e.g. control rooms.
Topology and installation
From a topologic point of view, the INTERBUS is a ring-connected system,
i.e. that all stations are actively linked within a closed transmission route.
Each station regenerates and forwards the incoming signal. The distinctive
feature of the INTERBUS system in contrast to other ring-connected sys-
tems is that the data is forwarded and returned within the same cable,
through all stations. Physically, this results in a line or tree structure. From
the busmaster starts a backbone from which the subsystems for structuring
the entire system are developed. This way, the bus system can be adapted
to any application.
The INTERBUS master - slave system allows the connection of up to 512
stations. The ring will be automatically closed by the last station.
INTERBUS characteristics
The following data is characteristic for INTERBUS:
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Master-Slave, fixed message length, deterministic
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Ring; every remote-bus station is a repeater
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Transfer rate: 500 Kbit/s
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A maximum of 4096 I/O points
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Bus length: 400 m (between two remote-bus stations)
Entire length: 13 km
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Typical application fields: general sensor/actuator technology, mechan-
ical engineering and terotechnology, process engineering
Physical addressing
The data is automatically assigned to the single stations via the physical
position of the stations in the system.
