DIGIVEX Motion - PROFIBUS
4
PVD 3554 GB 01/2004
A line bus structure is used to connect up all the devices. It is possible to interconnect up to 32
subscribers (masters or slaves) in one segment.
The bus is terminated at the beginning and the end of each segment by an active terminal.
Voltage must always be applied to both bus terminals for the bus to work correctly. The terminals
are usually switchable in the bus connectors.
Repeaters (cable amplifiers) can be used to link the different bus segments when there are more
than 32 subscribers, or to extend the network.
1.3 Bus access and data exchange procedure
The PROFIBUS bus operates in accordance with the principle of token passing. Active stations or
masters receive transmit authorization in a logical ring for a defined time window. These masters
can, then, communicate in this time window with other masters or manage communication with
associated slaves in accordance with a low priority master / slave procedure.
The PROFIBUS-DP uses, first and foremost, the master–slave procedure for exchanging data,
predominantly cyclically, with drives such as the DIGIVEX Motion.
Access to the drives is always carried out in accordance with the master-slave procedure; the
drives automatically being the slaves. Each slave can be identified through its unique MAC-
address on the bus. Data exchange is predominantly carried out cyclically with drives such as
DIGIVEX Motion.
1.4 Standards, guidelines and profiles
The standards and guidelines shown below can be obtained from PNO, the PROFIBUS user
organization; www.profibus.com.
• PROFIBUS
"Technical Overview" September 1999
Order no. 4.001 (German)
• PROFIBUS Specification (FMS, DP, PA)
All standard definitions relating to the PROFIBUS specification in accordance with EN 50170
vol. 2.0 (version 1.0)
Order no. 0.042 (English)
• PROFIBUS-DP Extensions
contains, amongst other things, the acyclic communication functions using PROFIBUS-DP
"Extensions to EN 50170"
EN 50 170 vol. 2 (version 2.0)
Order no. 2.082 (English)
• PROFIBUS Technical Guideline
"Installation guidelines for PROFIBUS-DP/FMS" September 1998
Order reference 2.111 (German)
• PROFIBUS guideline
"Connections for PROFIBUS" February 2000. Version 1.0
Order no. 2.141 (German)
• PROFIBUS guideline
"Optical transmission system for PROFIBUS" July 1999 (draft). Version 2.0
Order no. 2.021 (German)
