After The Configuration Is Stored To The Rxi Cpu - GE PACSystems RXi User Manual

4.2.9

After the Configuration is Stored to the RXi CPU

If the configuration is stored to non-volatile memory or if the Energy Pack is present, the RXi
Controller maintains configuration data over a power cycle.
The PNC transfers the configuration for remote IO-Devices over the PROFINET network.
PROFINET delivers IO-Device configurations when the IO-Controller establishes an
Application Relationship (AR) with the IO-Device. If all Application Relationships (AR)s are
lost, the IO-Device does not change the configuration of any of its I/O sub-modules. Each
sub-module retains the most recent configuration received since it was last powered up or
restarted. If a sub-module has not been configured since power-up or restart, it remains in its
hardware default condition. When the AR(s) are re-established and a configuration is sent to
the IO-Device, and the configuration of a sub-module has changed, the IO-Device applies the
new configuration.
If the PNC cannot connect to an IO-Device, the PNC logs a Loss of Device fault to the
Controller Fault tables. The PNC periodically attempts to establish communications and
configure the IO-Device. When one of these subsequent connect/configuration attempts is
successful, the PNC logs an Addition of Device fault for that IO-Device in the Controller Fault
tables.
Note:
Whether or not an IO-Device sets its outputs to their defaults when it receives a configuration
depends on the type of device. Refer to the device manufacturer's documentation to
determine this behavior.
If a PNS is powered up after receiving a configuration and the connection is then lost,
configuration defaults are applied when the connection is lost. On a subsequent connection, if
the same configuration is sent, outputs remain at the configuration defaults until the first
output data arrives. If a different configuration is sent, output defaults transition to the new
defaults until the first output data arrives.
Clearing the RXi Controller Configuration
If the programmer or IDM clears an RXi Controller's configuration, only the non-volatile PNC
parameters are retained. For a list of these parameters, refer to Non-Volatile Configuration
Parameters and Properties for PNC on page 53.
When the configuration is cleared, all open PROFINET IO-Device connections are closed.
IO-Devices react to clearing the PNC as a loss of connectivity and take appropriate actions
such as defaulting outputs.
GFK-2816F
It may take up to 5–10 seconds for the PNC to establish a connection to an
IO-Device, including one that previously existed, but was lost.
August 2015
Chapter 4. Configuration
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