Telegram structure
SD LE LEr SD DA SA FC DSAP SSAP Data Unit (DU) FCS ED
The Data Unit (DU) contains the DP-V1 header and the parameter request or the parameter
response. The DP V1 header consists of the funcon detecon, slot number, data set, and the
length of the user data. More informaon about the DP-V1 header can be found in the corre-
sponding PROFIBUS specicaon. A detailed descripon of the parameter request and param-
eter response can be found in the following subchapters.
Assignment of the user data depending on the data type
Depending on the data type used, the user data are assigned as follows:
Data type Length User data assignment
Byte 1 Byte 2 Byte 3 Byte 4 Byte ...
String x bytes Data (x bytes)
U8 1 byte Data 0x00
U16 2 bytes HIGH byte LOW byte
Data Data
U32 4 bytes HIGH word LOW word
HIGH byte LOW byte HIGH byte LOW byte
Data Data Data Data
Conguring the network
PROFIBUS
Parameter data transfer
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