Ability for a reference tag or any other type to point to the source tag history without data duplication (for use in perspective dashboards)

Ignition
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1

Hi All,

I'm currently looking for a solution to the following problem. We would like to make a setup like this.

INTERNAL Tag Structure
location_1 > technical_category_1 > sub_category_1 > sub_category_n > type_1 > device_type_1 (points to UDT) > device_category_1 > sensors > output_1 > value_tag

location_1 > technical_category_1 > sub_category_1 > sub_category_n > type_1 > device_type_1 (points to UDT) > device_category_1 > sensors > output_1 > status_tag

EXTERNAL Tag Structure
location_1 > logical_category_1 > logical_sub_category_1 > value_tag
location_1 > logical_category_1 > logical_sub_category_1 > status_tag

The issue

For real-time values this is a breeze. We use a reference tag with the INTERNAL Source Path and ignition handels this gracefully. Where we are struggeling is with the history, we can't seem to find a way to make Perspective Dashboards use the history of the Source.

What we would like to avoid is having all data duplicated (currently at several gigabytes per day and this will scale-up quickly).

There are some tricks that we can do:
For example: Use the Source Path reference and Dynamically propagate the Source in the Perspective boards.

However, that does not permit us to use for example a Powerchart and use the EXTERNAL Tag Structure where we have more control on what needs to be exposed.

Is there any way in ignition to have the history also forwarded to a reference tag or any other solutions ( without going into the historian databases and performing unsupported operations :wink: )?

2

Hi Nicky_Goethals! Did you manage to get any insights on your question? Facing the same issue, using some scripting workarounds, but not always possible to. Thanks.

3

I can't think of a way to do this without creating some kind of history provider that understands how to reach out to a reference's source tag's history provider (and hide that from the rest of the infrastructure).

Sounds like a feature request.

4

Hi,

I was unable to get any insights. What we are currently moving too is setting up a Structure with tags that reference a target tag. Resolving is then done on Perspective level. Couldn't find a way, contact with support also didn't give any new insights.

For the Powerchart we'll have to create a custom plugin.