Kipp&Zonen COMBILOG Data Logger - Manual (Page 119)

DA: Destination-Address (length = 1 byte):
The Destination-Address DA identifies the address of the com-
munication partner to whom the data shall be transmitted or
from whom data shall be requested. Destination-Address can
have values from 0 to 127 in the PROFIBUS-protocol. It is
stated here as a hexadecimal value (hex 00 .. 7F).
SA: Source-Address (length = 1 byte):
The Source-Address SA identifies the address of your own ap-
pliance and is reported to the communication partner with the
telegram. Source-Address can have values from 0 to 127 (hex
00 .. 7F).
FC: Frame-Control (length = 1 byte):
The Frame-Control FC identifies the type of telegram (request
or response telegram), the type of station (passive or active
station), the type of data transmission (send and/or request
data, with or without acknowledgement, etc.) and the telegram
acknowledgement (successful transmission or unsuccessful
transmission). For the entire listing, coding and meaning of the
Frame-Control see the PROFIBUS-Norm DIN 19245, part 1.
ReqDataUnit: Request-Data-Unit (length = 0 ... n byte):
The Request-Data-Unit identifies a data field in the request
telegram which contains the data for the communication part-
ner with the DA address.
Hardware Manual COMBILOG 1022
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