Siemens Simatic PCS 7 Function Manual page 91

Configuration
Examples using the FF Link for connections to field devices via AFD and AFS are shown in
the following figures.
Figure 4-7
Transmission rate
You have two interconnection options for the gateway between PROFIBUS DP and
FOUNDATION Fieldbus . These result in different transmission rates on PROFIBUS DP.
● If you connect via a bus link, a transmission rate of up to 12 Mbps is possible on PROFIBUS
DP.
● The transmission speed on the FOUNDATION Fieldbus is 31.25 Kbps.
Availability - high availability interfacing
In a redundant system, we recommend that you implement the interface to PROFIBUS DP
redundantly (redundant bus link).
High Availability Process Control Systems (V9.0)
Function Manual, 05/2017, A5E39221836-AA
Connection to a redundant PROFIBUS DP
High availability solutions in PCS 7
4.3 Solutions for communication
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