Figure 24: Subscribe and publish examples
18.1.4 Debugging an IEC 61499 application
After a project has been built and binded to an existing Excel configuration, a user would normally
want to check if every part is working according to the prior requirements before compiling finished
project and uploading it to production. Both 4Diac framework and WCC Lite offer tools for flexible
debugging.
There is a possibility that 4Diac FORTE might not start as a process. It may happen if multiple faults
occured and process has stopped. Process is also programmed to not start if no excel configuration
file is found, therefore a user should make sure that Excel configuration is uploaded and ready for
use.
Individual function blocks can be set to Watch mode: events can be triggered and values can
be forced at inputs or outputs (figures
25 and
To monitor the function blocks, the
application should be deployed and the IDE should be in Online mode (
Debug > Monitor System
> NewSystem
).
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