Mappvision ROI Get

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1

Hi,

Could I get the ROI Set Parameter of the camera by any FB?

I found the ViAccessSetVfExecutionRoi can set the ROI. I wonder is any FB can read the ROI, then I could check if I set the ROI successfully.

Thanks!

2

Hi @jiangp

actually, there is no FB to get the ROI’s.

But with Online / Compare / Automation Components in AS, you could check it, if you made a change.

In Logger you see, if the execution was successful.

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1 Like
3

Hi there,

usually you don’t need to check if anything happened correctly - the FUB ViAccessSetVfExecutionRoi (B&R Online Help) has a Done Output, which indicates that everything was done.
Mistrusting FUBs in such a way will simply make your life harder and any code you write harder to maintain and read since you will constantly check such things unnecessarily.

(Same where people check Done && !Busy - that’s redundant! If a FUB sets both, report a bug instead :slight_smile: )