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PACSystems* RX3i PROFINET Controller Manual
– December 2011
GFK-2571A
3
After the Configuration is Stored to the RX3i CPU
The configuration is stored to the RX3i CPU using Machine Edition. For complete instructions, refer
to the PACSystems system documentation. If the configuration is stored to non-volatile memory or is
battery-backed, the CPU maintains configuration data over power cycles.
The RX3i CPU transfers configuration data to the PNC over the backplane.
After successfully processing and applying its configuration data, the PNC turns on its CONFIG
LED.
The PNC then 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
(such as a VersaMax PNS) 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 powerup 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 in its local log table
and provides the information to the RX3i CPU 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 its local log table and provides the information to the RX3i CPU controller fault tables.
Note:
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.
When a VersaMax PNS receives a changed configuration, it temporarily sets all of its outputs to
their defaults. If the configuration has not changed, a VersaMax PNS does not default outputs.
Third-party IO-Devices may operate differently.
If a PNS is powered up and its modules are at hardware defaults, when it receives a
configuration for the first time, any new defaults that are different from hardware defaults are
applied until the first output data arrives.
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 RX3i CPU Configuration
If the programmer clears the configuration for an RX3i CPU containing a PNC, the PNC clears its
configuration (excluding non-volatile parameters, which are retained), closes all opened PROFINET
IO-Device connections, and turns OFF its CONFIG LED.
The VersaMax PNS and all third-party IO-Devices react to clearing the PNC as a loss of
connectivity, and take appropriate actions such as defaulting outputs.
