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Trends & DataLoggers
Posted: Thu Mar 01, 2012 2:01 pm
by bennanio
Hi, I'm having difficulty with the trends vs datalogging. I want to log some values and display the logged data. I can set them up in the datalogger but then I can't view the data in a trend object. I can set a trend to record history but then I can't label the values when they're exported to .csv. I also can't change the sampling interval for a trend like I can for a regular datalogger. Do I have to log the same tag to a datalogger and use the trend history?
Re: Trends & DataLoggers
Posted: Fri Mar 02, 2012 11:22 am
by Ron L.
I want to log some values and display the logged data. I can set them up in the datalogger but then I can't view the data in a trend object.
Yes, that is correct. There is not a way to copy values from the "DataLogger" to a "Trend" object.
If this is going to be a blocker for your project moving forward, then there are ways using C# script to open a DataLogger table, read the data and then put it into a 3rd party TrendChart object. This would take some work.
I can set a trend to record history but then I can't label the values when they're exported to .csv.
With iX Developer you could write some C# script open the file after it's created and edit the labels, however I don't have an approach to do this otherwise.
I also can't change the sampling interval for a trend like I can for a regular datalogger.
Under the "General" tab for the Trend object is a "Sampling Interval" property that is used for that object.
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Do I have to log the same tag to a datalogger and use the trend history?
The Trend and DataLogger are separate objects/functions in iX Developer and do not share data.
Re: Trends & DataLoggers
Posted: Fri Mar 02, 2012 12:06 pm
by Ron L.
On a related note, I've had some luck using a 3rd party trend chart control with iX Developer. I've attached an example project.
Re: Trends & DataLoggers
Posted: Tue Oct 16, 2012 11:12 am
by memethemyn
Hi Mr Ron..
In scripting page which code we can use to datalogger once?
Thanks..
Re: Trends & DataLoggers
Posted: Tue Oct 16, 2012 11:23 am
by mark.monroe
Not sure what you want. But here is a screenshot of where you can set the datalogger capture settings.
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Re: Trends & DataLoggers
Posted: Tue Oct 16, 2012 11:38 am
by memethemyn
For example I want to logonce in scripting
Like this
Code: Select all
if ((Globals.Tags.DEGERALIMOTOBIT6.Value==1) & (Globals.Tags.DEGERALMATIMERBIT6.Value==1))
{
[color=#BF0000][b]Datalogger log once script[/b][/color] Globals.Tags.ORDEL6PSV.Value=Globals.Tags.ORDEL6PSV.Value+Globals.Tags.Test_6_INC_Value;
}
Re: Trends & DataLoggers
Posted: Tue Oct 16, 2012 11:43 am
by mark.monroe
Then you put a tag in the "Log on Tag Event" section of the datalogger. When that tag changes, it will log once.
You can change a tag in script like this:
Globals.Tags.MyTag.Value++;