ICS T9451 modular

I/O initialization stalled – TN30051-01 (answer id. 544046)
If, during a controller start-up an I/O module failure occurs it can
stop the I/O initialization. As a result, the controller start-up process
fails to complete, leaving the application program suspended.
Changes to the controller start-up have been made that prevents this
from occurring.
 System power up with a 48 module configuration
The maximum number of I/O modules supported by an AADvance
controller is 48. Certain configurations, particularly when the
majority is Digital Output Modules, can result in a system not
starting-up correctly after a power cycle. Changes to the controller
start-up have been made to prevent this from occurring.
 Processor loss of synchronization
In dual processor configurations it was possible under certain
conditions for the two processors to lose synchronization, but
continue to run asynchronously. Although the I/O still went to its
fail-safe mode, it was possible for any binding data to be incorrect.
Changes to the controller have been made to prevent this from
occurring.
 Spurious Soft Error Detection (SED) faults – TN30056-01
(answer id: 564815)
Each AADvance module uses one or more FPGA’s to provide the
communication interface between the processor and the I/O
modules. The manufacturer of the FPGA used in AADvance
released a Product Notification identifying that this device could
spuriously generate SED errors. The FPGA manufacturers
recommended changes have been made to the controller to prevent
this from occurring.
 Processors lost synchronization after an on-line update
It is possible that on-line updates to a large system with more than 37
I/O modules installed can cause the processors to lose
synchronization. Changes to the controller have been made to
prevent this from occurring.
 Loss of SNCP Kernel Variable Bindings (KVB) communication
Under certain conditions it was possible for both links of dual SNCP
bindings configuration to fail. Changes to the controller have been
made to prevent this from happening