5
5.1 General information about PROFIBUS–DP for ”SIMODRIVE 611 universal”
5-203
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Data is transferred between the master and slaves according to the
master/slave principle. The drives are always the slaves. This permits
extremely fast cyclic data transfer.
In addition, non–cyclic communications functions are also used for
parameterization, diagnostics and fault/error handling during cyclic data
transfer with drives.
Additional
PROFIBUS
nodes
Field bus
DP slave
611U
DP master Other
slaves
Fig. 5-1 Data transfer via PROFIBUS
All of the word and double word formats used are transferred in the Big
Endian format, i.e. the high byte or high word is transferred before the
low byte or low word.
The communications type corresponds to the protocol shown in Fig.
5-2 for the ”DP slave 611U”.
Data transfer via
PROFIBUS
Transferring words
and
double words
Protocols
5 Communications via PROFIBUS DP
08.02
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