User Input / Configuration

[mrlucretius]

Morning,

So I have a task to do some calculations on various data point with user configurable scalar variables.

I am imagining right now that I can create some meta data points, and set the value of these points to a constant, and then use those as the variables for other meta data point calculations.

My question is, how might I allow a user to adjust the value of the static scalar meta data points?

Or, is there a better way to do this?

Thanks,
Alex

[CraigWeb]

I dont see anything wrong with this method. You will have the added advantage of being able to trend the variables. If a point is made settable. One can set it on the data point details page. If you plan on making a UI where they can set the points and preview the outcome then you will use <ma-set-point-value point="myPoint"></ma-set-point-value> In your HTML

Edit: forgot to mention virtual data points will work best for the variables.

[mrlucretius]

Great, thanks for the pointer to

<ma-set-point-value point="myPoint"></ma-set-point-value>

that is what I needed.

Are virtual data points different than meta data points?

Thanks,
Alex

[phildunlap]

Thanks Craig!

Alex,

Are virtual data points different than meta data points?

Yes, briefly,

Virtual points can:

1. Have simple change types to simulate data easier.
2. Performs a 'change' when refresh point value is called
3. Not be polled so that they're only user updated (data source setting)

While Meta points can

1. Have a script executed on cron patterns or from point events (updated, changed, logged)
2. Have a script executed when the point's value is refreshed
3. return UNCHANGED; to not update their value

So very different!