PFA, BGT · Edition 03.11l
11
Function
3 .7 Configuration
When planning a PROFIBUS DP system, unit-specific
parameters of each station are to be taken into account.
To allow for simple and standardized planning, the
parameters of the PFA have been summarized in a so-
called device master data file (GSD). The file structure
is standardized so that it can be read by the planning
devices of different manufacturers.
The GSD file is supplied on a CD with the PFA. The GSD
file can also be ordered at www.docuthek.com. The
steps required to copy the file are described in the in-
structions for the automation system.
3 .7 .1 Bus communication
Input/output bytes: The programmer can choose the
data to be transferred.
Input bytes
(PFA
▶
master)
Output bytes
(master
▶
PFA)
PFA 700
5 bytes
3 bytes
PFA 710
5 bytes
5 bytes
Baud rate: up to 1500 kbit/s.
The max. range per segment depends on the baud rate:
Baud rate [kbit/s]
Range
[m]
[ft]
93.75
1200
3937
187.5
1000
3280
500
400
1312
1500
200
656
The specified ranges may be increased by using repeat-
ers. No more than three repeaters should be connected
in series.
The specified ranges relate to bus cable type A (two-
core, shielded and twisted), e.g.:
Siemens, Order No.: 6XV1830-0EH10, or
Lapp cable unitronic, Order No.: 2170-220T.
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