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Tag scaling on trends

Created by: Import-User-1 at: 9/15/2005 12:35 PM (4 Replies)

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9/15/2005 12:35 PM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Hello, Is there any chance to scale external tag value on trend? For example if value is 6785 I need to show on trend 678.5 that is scaling *0.1. I don't want to use additional tags for it. Thank you for support. Best regards, Darius
Import-User-1 Posts: 3609 Rating: (29)
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9/15/2005 12:36 PM	Rate (0)
Import-User-2 Silver Member Joined: 8/10/2005 Last visit: 4/9/2024 Posts: 1486 Rating: (32)	Hi, One of the approaches is to use the scaling in external tag, but not into the tag logging control. Open the properties of external tag - see linear scaling section! Thank you in advance. I am looking forward to hearing from you soon. Best Regards, Svetozar Yolov -------------------------------------------------------------------- SIGMA Ltd. Tel: (+359) 82 821 647 Fax: (+359) 82 827 171 e-mail: smi@sigma-rousse-bg.com office: office@sigma-rousse-bg.com web: www.sigma-rousse-bg.com address: 3, Sasha Popov Str. 7000 Rousse BULGARIA --------------------------------------------------------------------
	Last edited by: Import-User-2 at: 9/15/2005 12:36 PM
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9/15/2005 12:37 PM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Hello, If I use scaling in external tag I can get values as 234.5. I need to scale 0.1 i.e. move decimal point one position to the left. My external tag is signed 32-bit and it is not floating point. For I/O of the tag I can use ANSI C to do 0.1 and return double. But I can't use anything on trends and do not know what to do. Thanks for answering. Best regards, Darius
Import-User-1 Posts: 3609 Rating: (29)
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9/15/2005 12:40 PM	Rate (1)
Import-User-2 Silver Member Joined: 8/10/2005 Last visit: 4/9/2024 Posts: 1486 Rating: (32)	Hi again, Other possibility is to use action for processing archive tag. Open Tag Logging editor. Open properties of any archive tag, go to parameters tab. In processing section select Action. Then you can select function for processing the tag before archiving. Here you can make tag processing (scaling for instance). I copy text from WinCC Information System, Release Notes, Notes on WinCC, WinCC CS, Tag Logging, Archiving converted process values: Tag Logging Archiving converted process values Example of a project function to convert a process value The following example illustrates the archiving of process values which are processed with a scaling function. The function is created as a project function using "Global Script". The value of the process tag (here: doValue) can be recalculated according to the requirements. The result is returned as a return value of the function to Tag Logging for archiving. The function is integrated as a processing method in Tag Logging and called in each time the process value is compiled. The parameters have the following significance: doLmtValue : last result returned as a return value doValue : value currently compiled dwCount : number of acquisition cycles since the last archiving process Archiving : TRUE, when archiving is performed Example: The current process value should be divided by 10 and archived. double Norm_PDE(double doLmtValue, double doValue, int dwCount, int Archivierung) { return (doValue/10); } Finally, the function must be integrated in Tag Logging / Archives: Open the properties of the process tag in the table window. Click on the "Parameters" tab control then on "Action" in the "Edit" field. Select the project function created. Note: Note that the transfer parameter is declared in exactly the same way as in this example. The parameters are transferred from Tag Logging to the function. What happens within an action is the responsibility of the user. I hope this will help you. Thank you in advance. I am looking forward to hearing from you soon. Best Regards, Svetozar Yolov -------------------------------------------------------------------- SIGMA Ltd. Tel: (+359) 82 821 647 Fax: (+359) 82 827 171 e-mail: smi@sigma-rousse-bg.com office: office@sigma-rousse-bg.com web: www.sigma-rousse-bg.com address: 3, Sasha Popov Str. 7000 Rousse BULGARIA --------------------------------------------------------------------

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9/15/2005 12:41 PM	Rate (0)
Import-User-1 Posts: 3609 Rating: (29)	Hello, Thant you very much. It is working very well. Best regards, Darius
Import-User-1 Posts: 3609 Rating: (29)
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