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how to configure on demand

10/6/2018 2:34 PM	Rate (0)
ali khan Member Joined: 6/4/2012 Last visit: 10/7/2023 Posts: 4 Rating: (0)	Hello, my problem is very simple for you we have two variables one is level and other is totalizer flow output the problem is we are you wincc and we got history for two resistor but problem is that the lord is on demand or any change in a registered I working on any change my registered is safe in Excel but my program need to on-demand I have pulse and his to a data in both register in Excel can you please help me my English is not a good but hopefully you understandI have used PLC S7 300 wincc software my mum is very simple we have two values one is 11 and second hand flow totalizer we have both individual registered MD 200 or MD 300 we have create in excel data log in both registered the problem is that wincc is only option on demand on any change I working in any change in registered his save the in Excel but my program need to on demand on demand mean any interrupt the data is saved both registered in Excel any option in wincc how to configure on demand thank you ------------------------------------------------------------------------------------------ Split from WinCC (TIA Portal) Forum - Tagging.
	Last edited by: The Helping Hand at: 10/8/2018 9:34:57 AM New subject after splitting Last edited by: The Helping Hand at: 10/8/2018 9:35:33 AM
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10/9/2018 3:55 PM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 4/17/2025 Posts: 15311 Rating: (1893)	Hello Ali Khan I´m so sorry I read your Topic a few times but I do not exactly understand what´s your usecase... Perhaps you can try again to describe your problem in another way. (do not use Google Translator) Bye Murof
	Last edited by: Murof at: 10/9/2018 3:55:49 PM If this Information really helps, you could use the Rate function
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10/10/2018 4:24 AM	Rate (0)
Prof. Frink Platinum Expert Joined: 7/5/2013 Last visit: 4/17/2025 Posts: 3147 Rating: (523)	Hello ali khan, this is how I understood: You have tags on the PLC that you are storing to an archive (excel respectively csv file) on the HMI. What kind of HMI are you using? E.g. for a Comfort Panel there is the possibility to set the acquisition mode for logging tags to cyclic (+ logging cycle) on change (logging when the HMI device detects a change of the value) on demand (use of system function "LogTag" required) Regards, Frink
	Pi is exactly three! All you have to do is think of things which people need but which don’t exist yet.
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This contribution was helpful to 1 thankful Users Murof

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