Structure Of Request/Response Telegrams - Siemens Simovert 6SE70 Series Operating Instructions Manual

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09.02
4.5.6

Structure of request/response telegrams

There is no basic difference between the useful data area in the request and response telegrams for
PROFIBUS and CAN Bus. The only difference between the two types of bus telegram is in the protocol frame
and the transmission sequence of H and L bytes. The structure of the protocol frame and the transmission
sequence of bytes are therefore described where necessary in the sections containing the start-up description
for the appropriate board.
Each request and each response basically comprises three areas apart from the telegram frame with header
and trailer:
Parameter identifier
Header
PKE
The parameter identifier (PKE) contains a request or response identifier (i.e. type of request or response) and
the number of the addressed parameter. The spontaneous signaling bit SPM (bit11) is not used on the
SIMOVERT 6SE70 Common Rectifier.
Parameter identifier
Header
PKE
Task/ response
SPM
identifier
Bits 0 to 10 contain the number of the parameter specified in the request.
Parameter number (PNU):
Parameter area
Basic unit
Technology board
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Index Parameter value
IND PWE
Index Parameter value
IND PWE
Parameter number (PNU)
Displayed Input on OP1S
number
P xxx, r xxx
H xxx, d xxx 1000 - 1999
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Trailer
Trailer
PNU in parameter
identifier
0 - 999 0 - 999
1000 - 1999
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