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Change number of I/O points on a Function Trend Control

Created by: p van os at: 7/16/2008 10:44 AM (3 Replies)

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7/16/2008 10:44 AM	Rate (0)
p van os Advanced Member Joined: 7/14/2006 Last visit: 9/13/2019 Posts: 7 Rating: (0)	I have a problem with the Function Trend Control. I want to change the number of points used in an XY Function trend. I can change the SourceNumberOfUAValues in runtime with a script on a button, but this does not change the trend window. After I enter the configuration in runtime and change something (eg the label) the new value is activated. With an Online Trend control there is a Property Command which you can set to activate the new settings. I cannot find this with the Function Trend Control Regards, Pim van Os

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7/16/2008 6:12 PM	Rate (0)
Phantom75 Platinum Expert Joined: 1/10/2008 Last visit: 9/19/2019 Posts: 2661 Rating: (267)	I am not sure I fully understand your problem. Why don't you create a tag for the number of points and make the property SourceNumberOfUAValues dynamic as shown in the attachment? Attachment Dokument1.pdf (44 Downloads)

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7/16/2008 9:34 PM	Rate (0)
p van os Advanced Member Joined: 7/14/2006 Last visit: 9/13/2019 Posts: 7 Rating: (0)	I tried this before. When this is done, the trend is starting from this point with a blank trend. It does apply the new number of points. I want to collect the last 5 or 100 measuring points from the archive and show them immediately on the screen. This is the way if you change the properties in runtime and apply these with the dialog box.

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7/16/2008 10:22 PM	Rate (0)
Phantom75 Platinum Expert Joined: 1/10/2008 Last visit: 9/19/2019 Posts: 2661 Rating: (267)	p van os ... When this is done, the trend is starting from this point with a blank trend. It does apply the new number of points. ... Are youhandling the FreezeProviderConnections properly? Before the change this should be set to 1 and after the change reset to 0.

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