PROFINET switch 4/8/16-port | Version 1 | 20.02.2020
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7.3
What do the LEDs BF and SF mean?
The “BF” LED shows logical “bus errors”, for example, that the device has not received a
configuration, the configuration is defective, or no PROFINET communication is possible at all
(network error).
The “SF” LED shows “collective errors”. This can include, for example, an existing PROFINET
diagnosis.
7.4
What is “Device exchange during operation”, and what role does the
PROFINET switch play here?
If a PROFINET participant malfunctions while in operation, a replacement device is detected
following installation on the basis of its position in the topology (by the PROFINET neighbors) and is
automatically provided with its IP address and its PROFINET name. The CPU can then configure the
replacement device and restart. The neighboring PROFINET devices, for example, the switch, must to
this purpose support PROFINET in order to enable this function.
7.5
Why should PROFINET devices have PROFINET certification?
The PNO certification is carried out by accredited testing labs and is standardized by the PNO.
PROFINET certification should ensure both the function of the PROFINET components in accordance
with standards and the interoperability of various manufacturers in a PROFINET network.
7.6
What is behind the PROFINET conformance classes A, B, C?
PROFINET is divided into conformance classes (CC). The conformance classes define sensible
function scopes and are thus decision-making criteria for system operators when using PROFINET
components.
With prior definition of an application in a CC, the user can make a selection of components with
clearly defined minimum properties.
From the PNO document “PROFINET Planning Guideline (Order no.: 8.061)”
You can find more information on the conformance classes in the PNO document “The PROFINET IO
Conformance Classes - Guidelines for PROFINET IO (Order no.: 7.041)”.
