Balluff BIS M-370-000-A02, Manual, Page: 127 / 198

BIS M-62_ MANUAL
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9
9 PROFIBUS INTERFACE
NOTE
For BIS M-622-070-A01-03-ST33 models.
9.1 PROFIBUS OVERVIEW
Profibus was created under German Government leadership in co-operation with automation
manufacturers (Siemens) in 1989. Today it is commonly found in Process Control, large
assembly and material handling machines. Just a single-cable which is able to wire multi-
input sensor blocks, pneumatic valves, complex intelligent devices, smaller sub-networks,
operator interfaces and many other devices.
9.2 PROFIBUS-DP
Basically Profibus is available in three different versions:
Profibus-DP (Decentralized Periphery)
Multiple masters are possible with Profibus-DP, in which case each slave device is
assigned to one master. This means that multiple masters can read inputs from the
device but only one master can write outputs to that device.
Profibus-FMS
It is a peer to peer messaging format, which allows masters to communicate with one
another. Just as in Profibus-DP, up to 126 nodes are available and all can be masters
if desired. FMS messages consume more overhead than DP messages.
Profibus-PA
PA protocol is the same as the latest Profibus-DP except that voltage and current
levels are reduced to meet the requirements of intrinsic safety (Class I div. II) for the
process industry.
The Profibus Processor unit supports
Profibus-DP only , since this version has been
specifically designed for factory automation.
MAIN FEATURES:
Maximum Number of Nodes: 126
Distance: 100 m to 24 Km (with repeaters and fibre optic transmission)
Baud rate: 9600 to 12M bps