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WinCC Function Trend Control, How to clear trend without closing display?

Created by: 7001 at: 7/14/2006 6:49 PM (19 Replies)

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7/14/2006 6:49 PM	Rate (0)
7001 Posts: 12 Rating: (0)	Hello, I am working on WinCC Function Trend Control. The data of X-Axis and Y-Axis are from PLC. The data of X-Axis will be sent from 0 again after a while. At this moment, I need clear the trend on the display, like to redraw the trend curve. I know if I close the display and open it again the trend would start from fresh, but I would lose all the trend control properties changed online. How can I clear the trend display without closing the display window?
7001 Posts: 12 Rating: (0)
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7/14/2006 9:54 PM	Rate (0)
DimiCamp Posts: 168 Rating: (49)	Hi, what if you hide only the desired curve (e.g. index 5), like: SetPropWord("PictureName.Pdl", "ControlName", "Index", 5); SetPropBOOL("PictureName.Pdl", "ControlName", "ItemVisible", FALSE); and then show it again at a latter time: SetPropWord("PictureName.Pdl", "ControlName", "Index", 5); SetPropBOOL("PictureName.Pdl", "ControlName", "ItemVisible", TRUE); Best Regards, Dimitri.
DimiCamp Posts: 168 Rating: (49)	Last edited by: DimiCamp at: 7/14/2006 9:55 PM
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7/17/2006 10:13 AM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	Unfortunately hiding / showing the trend does not clear the values. However you could use the DeleteData property to clear the trend. For example : [code] SetPropBOOL(lpszPictureName,"Control1","DeleteData",TRUE); [/code]

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7/17/2006 1:41 PM	Rate (0)
DimiCamp Posts: 168 Rating: (49)	"WinCC Runtime: PDL Run time: Property not found". Hi Salma, could not get it working with my WinCC60SP4... Best Regards, Dimitri.
DimiCamp Posts: 168 Rating: (49)
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7/17/2006 1:47 PM	Rate (0)
DimiCamp Posts: 168 Rating: (49)	Thinkit must be something like this: SetPropChar(lpszPictureName,"Graficos_Control", "Command", "DeleteData"); But I didn't see it deleting anything...
DimiCamp Posts: 168 Rating: (49)	Last edited by: DimiCamp at: 7/17/2006 1:47 PM
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7/17/2006 2:35 PM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	Hi Dimitri I am using WinCC V6SP4 too. My button and trend are on the same window and my trend control is named "Control1". Are you sure you are using the Function Trend Control and not the Online Trend Control ? I can post the PDL here if you like ? Salma

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7/17/2006 3:15 PM	Rate (0)
DimiCamp Posts: 168 Rating: (49)	Sorry Salma, I was using Online Trend Control... You're completely Jedi Master, Dimitri.
DimiCamp Posts: 168 Rating: (49)
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7/17/2006 3:22 PM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	ah, most kind your comment is [:)] I also figured out how to clear the Online Trend Control if anyone needs to. You can use the MeasurePoints property. Simply setthevalue to what it already is. The default is 120: [code] SetPropWord("main.Pdl", "Control3", "TimeAxis", -1); SetPropBOOL("main.Pdl", "Control3", "MeasurePoints", 120); [/code]
	Last edited by: salma at: 7/17/2006 3:24 PM
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7/17/2006 4:53 PM	Rate (0)
7001 Posts: 12 Rating: (0)	Salma, I use WindCC V6.0 SP3. I made a button to clear the trend, butthe functiondid not work. I monitor the value of "DeleteData" from a Appplication Window, the value was always 0 and never changed to 1 when the button clicked. Following is my code: dd = GetPropBOOL(lpszPictureName,"Control2", "DeleteData");//Return-Type: BOOL if (dd == 0) SetPropBOOL(lpszPictureName, "Control2", "DeleteData", 1); else SetPropBOOL(lpszPictureName, "Control2", "DeleteData", 0); printf("Delete data = %d\n",dd); Thanks, HJ
7001 Posts: 12 Rating: (0)
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7/17/2006 5:00 PM	Rate (0)
Salma Gold Member Joined: 9/27/2005 Last visit: 11/27/2007 Posts: 1398 Rating: (151)	Hi HJ What happens with a one line script that sets property to true? e.g. SetPropBOOL(lpszPictureName, "Control2", "DeleteData", 1); I found that WinCC automatically sets the property back to false after clearing the trend. Salma

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