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Interbus-S
QUICKDESIGNER
Interbus-S
INTERBUS Network Description
INTERBUS is an open systems approach to a high performance, ring-based, distributed device network
for manufacturing and process control. INTERBUS is a high-efficiency protocol designed for today's
high-speed control requirements. An INTERBUS system consists of a controller board installed into a
computer (PC, VME, etc.) or PLC that communicates to a variety of I/O devices. INTERBUS is
operable with most standard PC software packages and operating systems.
INTERBUS Protocol
The INTERBUS protocol provides the high throughput demanded by today's advanced I/O network
requirements. I/O data is transmitted in frames that provide simultaneous and predictable updates to all
devices on the network. Secure transmissions are ensured by the protocol's CRC error checking
capabilities. Furthermore, comprehensive diagnostics allow you to pinpoint the cause and location of
errors. This provides maximum network uptime. An embedded messaging protocol allows you to send
complex parameter and message data across the INTERBUS network.
The basic concept of an open bus system is to allow a similar exchange of information between devices
produced by different manufacturers. Information includes commands and I/O data that have been
defined as a standard profile by which devices operate. Standard profiles are available for drives,
encoders, robotic controllers, pneumatic valves, etc. The INTERBUS protocol, DIN 19258, is the
communication standard for these profiles. It is an open standard for I/O networks in industrial
applications.
I/O Network Operations
Network for I/O devices on an INTERBUS-S network are automatically determined by their physical
position in the network. This eliminates the need for manually setting device addresses. The
INTERBUS-S controller board performs an identification cycle (ID) to determine the addresses. The
QuickPanel module ID# is 243. After the ID cycle is completed, the host control verifies the network
configuration. Once verified, the network is ready for operation.
The INTERBUS-S controller board connects to many types of PLC or computer-based host controllers.
The controller board performs all network functions independent of the host controller. Advanced
features of the INTERBUS-S controller board include peer-to-peer communications, event processing,
and logical addressing.