Chapter 4. Configuration
GFK-2737F December 2016 49
4.4 After the Configuration is Stored to the PROFINET Controller
For complete instructions, refer to the documentation for the I/O Controller and the PROFINET I/O
configuration tool.
After successfully processing and applying its configuration data, the PROFINET Controller transfers the
configuration for remote IO-Devices over the PROFINET network.
A PROFINET Controller delivers configuration data to an IO-Device whenever it establishes (or
re-establishes connection) with that IO-Device. In the case of the IO-Device being a PNS:
If all connections are lost, the PNS retains the most recent configuration received since it was last
powered up.
If a PNS has not been configured since being powered up, it remains in its hardware default condition.
Whenever the PROFINET connection is re-established and a configuration is sent to the PNS, the PNS
cross-checks the configuration data; if the configuration has changed, the PNS applies the new
configuration.
If there are differences between the expected, configured modules and the modules physically present in
the PNS rack when a connection is established, the PNS transmits appropriate Alarm messages to the
PROFINET Controller. Refer to Chapter 6, Diagnostics for more detail.
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