B.2.2 Performing an Update
If it is determined that an update is required, then the following should be considered before
performing the update:
• Is the unit connecting such that loss of the GSPI peripherals for a few minutes could cause
a problem? An example of what might cause a problem is if IO outputs from the unit are
used to control the state of another controller. In such a case it may be that the loss of
IO on this unit might cause one or more connected controllers to turn off their signals.
• Is the current state of the junction such that the loss of the GSPI peripherals for a few
minutes will cause a problem? An example of what might cause a problem is if loss of
detector inputs connected to the unit IO makes the controller operation unsuitable for
the prevailing traffic conditions.
• Is the local power supply currently stable and unlikely to be interrupted? An interruption
to the power during a GSPI peripheral update may result in one or more of the GSPI
peripherals requiring repair.
When a suitable time for the upgrade has been determined and reached then the upgrade can
be initiated by pressing the “Start” button on the Peripherals – F/W Update web page. Progress
information will be displayed during the upgrade with the page returning to its initial state a
little while after the upgrade completes.
On successful upgrade, the Peripherals – F/W Update web page will be refreshed.
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