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random lines on f(x) trend view on ktp400 due to unknown datalog problem

Created by: harvi at: 3/11/2013 10:18 AM (3 Replies)

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3/11/2013 10:18 AM	Rate (0)
harvi Posts: 9 Rating: (0)	Hello, I have problem with datalog records. I need log two integer variables for f(x) trendview (first one is time in seconds, second one is status of valve). Values are logged on change HMI tag "test_int" which is connected to PLC tag. Usually it works OK, but sometimes there is small time difference in timestamp (see attached picture - there is datalog with wrong record - yellow, way how are tags logged and graph). This bug causes an error in f(x) trend view (graph should normally looks like 5s long spikes in 20min period. When the problem occurs graph look like spikes inside rectangle. Is there any known timestamp problem with panel? thank you for an advice configuration: CPU 1214C DC/DC/Rly HMI KTP400 Comfort TIA v11sp2u5 Attachment datalog_bug.jpg (452 Downloads)
harvi Posts: 9 Rating: (0)	Last edited by: harvi at: 3/21/2013 7:03 AM
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3/12/2013 2:45 PM	Rate (0)
The Body Gold Member Joined: 5/13/2008 Last visit: 12/18/2019 Posts: 836 Rating: (71)	Hi harvi, if the datas in f(t) trend and in datalog are ok, I guess with the f(x) trend is something wrong. I would open a support request to get a solution.
	mfG / Best regards Roland
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3/21/2013 7:09 AM	Rate (0)
harvi Posts: 9 Rating: (0)	problem doesn't disappear after WinCC update from v11sp2 to v11sp2u5
harvi Posts: 9 Rating: (0)
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3/22/2013 3:01 PM	Rate (0)
Tweety Posts: 3037 Rating: (192)	Hello, You start a support request for your problem. support request Tweety
Tweety Posts: 3037 Rating: (192)
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