66/176 Interbus
Bosch Rexroth AG
, MIT: ID 40, 3 842 530 344/2014-05
8 Interbus
8.1 Overview
Interbus was designed as an open fieldbus system when it was first released in 1987.
At the beginning of 2000, IEC 61158 was adopted as a draft for an international
fieldbus standard. Interbus was then set as the national standard (DIN 19258), then
later adopted as the European standard (EN 50254). Literature on Interbus can be
found under [I.] in Chapter 16.3 “References”.
• Bus topology: active ring, every remote bus user is a repeater
• Master-slave concept:
The interface module (master) is the central device for controlling the Interbus
data ring. It exchanges the data serially transported in the data ring in fixed
telegram lengths with the higher control or computer system and the subordinate
Interbus users in both directions simultaneously and cyclically (full-duplex)
• Transmission rate: 500 kbps
• Max. 4,096 I/O points
• Bus length: 400 m (between two remote bus users), total length: 13 km
• Typical applications: general sensor/actuating systems, mechanical and systems
engineering, process technology
The ID 40/SLK-IBS is a
remote bus
user (as opposed to local bus users). The term
“remote bus” is also abbreviated as “RB”.
ID 40 uses the
PCP channel
and
process data channel
Interbus standard
communication services to exchange data. The process data channel is used
for event-oriented data exchange, the PCP channel for command-oriented data
exchange.
The
I/O configuration
of the SLK is set in the device and cannot be modified. It
indicates how many bytes are reserved for the process data area and the PCP
channel segments.
The SLK display shows Interbus states, see Chapter 11.2.4 “Showing Interbus status
on the display” for a description of the displays.
[I1] offers a general introduction to Interbus technology.
8.2 Addressing data in the ID 40 system
The SLK data areas are addressed in the Interbus SLK in the same way as with
Profibus. See Chapter 7.7 “Addressing data in the ID 40 system”.
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