Installation OZD Profi 12M ...
Release
01
07/2017
25
2.1 Line topology
Figure 1: Network structure in an optical line topology
In a line structure, the individual OZD Profi 12M ... are connected together by
dual-fiber optical fibers. Repeaters with one optical port are sufficient at the
beginning and end of a line, between which repeaters with two optical ports
are necessary.
If single point-to-point connections are to be built up, this can be achieved
using two repeaters each with one optical port.
The line topology can be realized with and without fiber link monitoring. If
both operating modes are used within an optical fiber line, the operating
mode ”Line topology without fiber link monitoring“ determines the availability
of this fiber line. It is recommended that fiber link monitoring be used in
homogeneous OZD Profi networks (default factory setting).
Please note that the following ambient conditions must be fulfilled to ensure
that network configuration functions correctly:
The parameters MIN T
SDR
described in the PROFIBUS standard EN
50170 must be set to a value ≥ 11 on all terminals. This is usually the
case, but the setting should be checked if communication malfunctions
continuously arise.
When configuring your network, select low bus subscriber addresses
wherever possible. This ensures that master timeout times which may
arise are kept as short as possible in the event of a malfunction.
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