26 NETLink
®
Ethernet Products
5.1.3 PPI configuration
Generally, the same thing applies under PPI as for the MPI con-
figuration. However, it should be noted that passive participants
never transmit the Profibus parameters, and that it is thus not
possible to "automatically" determine the bus parameters.
In addition to the parameter transmission rate already addressed
under chapter 5.1.1 and the Highest Station Address, the parame-
ter field for Advanced PPI is also available for selection under PPI:
According to current knowledge, all S7-200 CPUs of the product
line 22x should be able to communicate with ‘Advanced PPI.’ It is
recommended to use ‘Advanced PPI’ if possible.
5.2 Local connection (TCP parameterization)
There are three basic ways of parameterizing NETLink
®
devices at
the TCP end:
• Parameterization via ‘Set PG/PC interface
Existing stations can be reparameterized using the ‘Change’
button
• Parameterization via the ‘NETLink PRO Family configuration’
tool (see Section 6).
• Parameterization via the web interface of the NETLink
®
Gateway (see Section 7.3).
If a NETLink
®
is configured via the NETLink-S7-NET driver, the
following points must be considered:
If the NETLink
®
is active on the bus when reparameterization is
required (e.g. a variable table or block is being viewed),
reparameterization is not performed.
Normally the baud rate
cannot be detected auto
-
matically at PPI systems.
For communications with
an EM 277 unit, the “A
d-
vanced PPI” option must
be enabled.
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