TIA V12, “GetRulerData” function doesn’t work.

Hi,

I would like to have advice about whether there is a method for getting X, Y data where the Ruler locates from TrendView of WinCC Flexible Runtime 2008 or WinCC TIA V12?

I’ve tested and found it successful in “OnlineTrendControl” of WinCC V7.2 SP3 by calling a function named “GetRulerData”, but failed in getting ruler data from TrendView of neither WinCC Flexible Runtime 2008 nor WinCC TIA V12 SP1.

It will be much appreciated if someone could advise the approaching method for getting ruler data from WinCC TIA V12 SP1.

Thanks a lot!!

Best regards,

Komi

GetRulerData

https://www.automation.siemens.com/mdm/default.aspx?Language=en&ShowMsg=false&DocVersionId=56516264843&GuiLanguage=en&query=GetRulerData&cssearchengine=NEW

P.S.: This function is belonging to

K!ke

Why don't you use the implemented zoom function?

K!ke

Hi K!ke,

Thanks again for your reply!

We don't use the implemented zoom function because it doesn't meet our needs.

The native "zoom" function of TrendView can display 1000(index:0~999) regists at a time, our source archived trend has 8192 regists (index: 0 ~8191 / DWord).

If using native "zoom" function, it can zoom-out with a upper-limit to index:999.

For example,

you may have it zoom in displaying a rought curve while showing 0..499 or

have it zoom out displaying a sharpen curve while showing 0..999 or so, but there's a limit of 1000 regists still.

What we need is to let it display 0..8191 regists at the same time.

So we need to do the index remapping from index 0..8191 in proportion to 0..499 to have the trend redrawn.　　

& ***** We need to redraw the trend by giving interpolated values.

If the GetRulerData function is valid, then it will be more convenient for us to get the x-index, then we don't have to create our faking "ruler" upon the TrendView.

[e.x: for remapping the index]

0 0

: :

2047 254

: :

4095 499

: :

8191 999

P.S: It seems I misunderstood the classify of Siemens MDM.

Thanks & best regards,

Komi

K!ke

Hello,

if I get you right, your archived tag has 8192 values and you try to interpolate this to1000 values.

or do you try to "fool" the trend view so it shows all your values?

K!ke

Hi Kike,

To be brief,

(1) Our original requirement is to display all of our 8192 archived records in the whole TrendView at the same time.

(2) As an alternative way, we interpolate the values to 1000 records to be shown finally.

(3) For better performance, we don't want to calculate the interpolation from time to time.

Just do the calculation after user switched to the Trend screen and drag the ruler and so on.

(*****As you may guess why we don't provide the TrendView with a datasource having index0~999.)

Actually we have set up all the auxiliaries.

Values are being archived in an array and mapped to "corresponding index" and to be shown in TrendView perfectly.

Except that ... We need to draw a ruler to get the X-index for mapping to the "corresponding index" and calculating the interpolated value.

***** Because the TrendView is always on the foreground, thus partial of our hand-made "Ruler" is always shielded behind.

If we could get the ruler data from the native ruler, things will be more perfect.

Sorry for my poor explanationand thanks for you patience.

Best regards,

Komi

K!ke

Hello,

I think in this case using Runtime Professional would be more suitable.
There you can automatically compress the archive using the mean value etc. or as mentioned before read the ruler data.

But as I don't know the rest of your project I cannot decide if this is a alternative.

K!ke

Hi K!ke,

Thanks a lot for your suggestion!!

Actually I would like to take use of Professional version myself.

I think it saves time.

Though my colleague is more familiar with "Advanced version",

maybe this will be a trigger for him to get access to "Professional version".

Best regards,

Komi

(P.S: I would like to post his "artificial TrendView" next week after we getting back to our office from our engineering trip!)

K!ke

Hello,

I think in this case using Runtime Professional would be more suitable.
There you can automatically compress the archive using the mean value etc. or as mentioned before read the ruler data.

But as I don't know the rest of your project I cannot decide if this is a alternative.

K!ke

Hi K!ke,

Just for your reference.

Please take a look at the attachment including 2 snaps of our artificial rulers.

Now it seems working well, but it will be better if there's a horizontal scroll bar aside. (no such a control)

Just for your reference!

Have a nice day,

Komi