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Overview
Overview
This chapter contains a short description of the PROFIBUS
standard and the RPBA-01 PROFIBUS DP Adapter module, a
delivery checklist and warranty information.
PROFIBUS standard
PROFIBUS is an open serial communication standard that
enables data exchange between all kinds of automation
components. There are three main variations of PROFIBUS:
PROFIBUS-FMS (Fieldbus Message Specification),
PROFIBUS-DP (Decentralised Periphery) and PROFIBUS-PA
(Process Automation). The RPBA-01 PROFIBUS DP Adapter
module supports the PROFIBUS DP protocol, including its DP-V1
extension.
The physical transmission medium of the bus is a twisted pair
cable (according to the RS-485 standard). The maximum length of
the bus cable is 100 to 1200 metres, depending on the selected
transmission rate (see
can be connected to the same PROFIBUS network segment
without the use of repeaters. With repeaters, it is possible to
connect 127 nodes (including repeaters and master station) to the
network.
In PROFIBUS communication, the master station – usually a
programmable logic controller (PLC) – polls the nodes which
respond and take the actions requested by the master. It is also
possible to send a command to several nodes at the same
broadcast; in this case the nodes do not send a response
message to the master.
The PROFIBUS protocol family is specified in the IEC 61158
standard. The communication with a drive is defined in the
PROFIdrive Profile – The PROFIBUS Profile for Adjustable Speed
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Technical data
chapter). Up to 31 nodes
15
Overview
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