Functions Of The Fieldbus Connections (Fb) - Siemens Simatic CFU Commissioning Manual

Functions

4.2 Functions of the fieldbus connections (FB)

4.2 Functions of the fieldbus connections (FB)
FIELDBUS
The CFU PA compiles the protocols between the PROFINET IO and the PROFIBUS PA.
With regard to field devices, the CFU PA operates like a BusLink (PROFINET IO to PROFIBUS
PA) with connected field distributors for PA field devices.
You connect the PA field devices to the "FIELDBUS; FB<n>" connections on the CFU PA.
CFU PA and PA field devices form a common autonomous PROFIBUS PA system.
Parameters
Information on parameter assignment of the field devices can be found in the documentation
of the field device.
Availability
● For the "Fieldbus; FB<n>" connections, the following applies when physical faults occur
(such as wire break or short circuit):
– Faulty connections are automatically deactivated as long as the fault exists.
– The bus is automatically terminated
● Repairs and extensions at the individual "Fieldbus: FB<n>" connections are possible during
operation.
Additional information
● Section "Voltage relationships (galvanic isolation) (Page 27)"
● Section "Diagnostics via LED displays (Page 91)"
● Section "Using service interface (Page 106)"
● You can find information on configuring and assigning parameters in section
"Commissioning (offline) (Page 66)".
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Commissioning Manual, 07/2018, A5E39252870-AC
SIMATIC CFU