PFA, BGT · Edition 03.11l
10
Function
3 .5 Addressing
A maximum of 126 units (masters and slaves) can be
connected to a PROFIBUS DP system. Each station is
assigned an individual PROFIBUS address which can
be set between 0 and 126 using two code switches on
the PFA board.
0
87
6 5 4
32
1
0
EDC
B A 9 8 7 6
5 4
32
1
F
9
114 dec
3 .6 Network technology
All devices are connected in a bus structure (line). Up
to 32 stations (masters or slaves) can be connected in
a single segment. The beginning and end of each seg-
ment is fitted with an active bus terminator. Both bus
terminators must have a permanent power supply to
ensure error-free operation. The power supply for the
bus terminator is provided by the PFA. The bus termina-
tor can be connected in the bus connection plug.
If more than 32 stations are implemented or if there is a
need to expand the network area, repeaters (amplifiers)
must be used to link the individual bus segments.