Tags dynamic min/max props

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1

Hi all,

I need dynamic min/max tag properties, i.e. min/max tag props which can be bound to other tags values. As of now, I don’t see any solution to that: is it maybe on the roadmap?

Thanks in advance, regards

2

hey pgmo,

I had a quick look and I see what you mean. If you need the dynamic clamping immediately, are you able to configure it at the source/in the PLC?

3

Basically, not with bindings. You could have valueChange scripts on tags holding the limits write to the limit properties on the subject tag. The inability to use bindings on general tag properties is a common problem.

Be aware that the workaround--writing to tag props from another tag--causes a tag restart of the subject tag. This has negative consequences in the configuration system and historian.

A more robust solution is to use an expression tag, referencing the subject and the desired limits, to perform all of the limiting operations.

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