<4. Control Application Creation>
4.8.4 Importance of Boot Project
It is extremely important to download the latest project to the boot project in real
systems.
As described in Section 4.8.2, “Downloading Boot Project and Source,” when the
FCN-500 or FCN-RTU is powered on, it begins control using the boot project.
If the boot project is out-dated, powering off and then on the FCN-500 or FCN-RTU
will cause control to be started with an out-dated control application.
A Case Story
In daily operation, an application was modified using online download and its
operation tested but the changes were not downloaded to the boot project.
At the next routine inspection, the FCN-500 or FCN-RTU was powered off and then
powered on.
The FCN-500 or FCN-RTU started control using the boot project, which was out-
dated, so control was unfortunately started with an old control application instead of
the latest control application used before the routine inspection.
To avoid this unfortunate scenario, we recommend downloading the boot project at
the same time whenever the project is downloaded to the FCN-500 or FCN-RTU.
Specifically, this means ticking the [Include Bootproject] checkbox as shown within
blue box (1) in the picture given in Section 4.8.3, “Detailed Description of Download
Dialog.”
If it is not feasible to download the boot project at the same time as the project for
some reason, download the latest control application to the boot project
subsequently using the button enclosed by box (3) of the picture shown in Section
4.8.3.
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