<4. Control Application Creation>
4.1.5 Multi-resource Project
In Logic Designer applications, FCN-500s or FCN-RTUs are called resources and
one FCN-500 or FCN-RTU controller maps to one resource.
In the example shown in the figure below, a system comprises three FCN-500s so
three resources are created. When creating projects for this system, you can choose
either to create three resources within one project, as indicated by the solid line, or
create three projects, one for each resource, as indicated by the dotted lines.
In cases like this where there is more than one resource within a system, consider
and decide whether to create one project containing multiple resources, or one
project per resource.
FCN01 FCN02 FCN03
Project
Project01
Project02 Project03
When creating a multi-resource project, the number of resources that can be defined
within one project of Logic Designer is limited to 100 as described in Section 4.1.6,
“Application Size.” This system limit, though present, is actually large enough for
most practical systems.
On the other hand, creating one project per resource requires creating as many
projects as the number of resources, which makes project management on the
development PC more tedious.
Hence, in principle, create only one project even if there are multiple resources
within a system is recommended.
However, having many resources within one project makes engineering work more
tedious and may cause confusion. Therefore, we recommend limiting the maximum
number of resources per project to between 5 and 10.
TIP
This recommendation for limiting the maximum number of resources within one project to between 5
and 10 is based on considerations of efficient project management and engineering.
The system itself can accommodate up to 100 resources per project so even defining more than 10
resources per project is not a problem.
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