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Filtering negative tag values in attributes in AF Analyses

Question asked by DmitryBagrov on Jul 19, 2018
Latest reply on Jul 31, 2018 by vkaufmann

Dear Forum Members,

I need your help.

I create totalizers in AF Analyses using TagTot Function. In the source tags for totalizers I need to filter negative values, replacing them with zeros.

Here's what I did:

1. Created attributes with Data Reference: PI Point . In Settings I attached a PI tag (\\PISrvName\TagName). Attribute Name = TagName

2. Created attributes with Data Reference: Formula . String of settings: A=TagName;[if A < 0 then 0 else A] . Attribute Name = TagName_FILTERED

In principle, the second attribute receives data and filters it, but when the first attribute has a bad value, the second attribute has an error: "Data was not available for attribute 'TagName' ". And then the totalizer gives an error "Calc Failed".

In other cases, the totalizer works correctly.

Please tell me what I did wrong. Is there a more correct way to filter tag values in an attribute for a totalizer?

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