Trend in panel builder 6
I want to make trends, using panel builder 6, and display them in PP874K to customers.
I have a signal, XX_GP1_MV1, and use 'Trend Viewer' in panel builder 6 and configured Curves with Tag = XX_GP1_MV1.
When i show this trend display in runtime it shows the value for XX_GP1_MV1 from now and forward not any historical data presents in 'Trend Viewer'.
I create 'Data Logger', DataLogger1, and and a LogItem1 with Tag XX_GP1_MV1.
I think that now LogItem1 collects data from XX_GP1_MV1?
Now when i go to 'Trend Viewer' and configure Curves i can set Tag = XX_GP1_MV1
OR Log Item = DataLogger1.LogItem1, if i configure Log Item = DataLogger1.LogItem1 the trend display doesn't show anything.
What i'm i doing wrong, anyone?
regards / Anders
No now i tried with a real panel PP874 and i have the same problem with trend.I want to trend signals and when I, after some time, download a of the project currently loaded I PP874 I still want to se the trended values from before the latest download.I have tested two ways:
* A trend that shows the curve Tag=mv1. This will work until I download (update) the downloaded application then it starts over I cant se any historical data. I think DataLogger will store historical data otherwise whats the point with DataLogger am I thinking right?
* I make a Log Item1 in Datalogger, LogItem1=mv1.
* In TrendViewer1 I configured one curve to be LogItem1. But every time I download I can’t get any values in the trend until I push a buttom wich have a action “Log Once” then I log the value once. I van’t get a trend that changes with the LogItem1 and to be able to show historical values.
__I have tried with action “Start Logging” = I can’t se something happen.
__I have tried with action “Stopp Logging” = I can’t se something happen.
__I have tried with action “Clear Logging” =it empties the datalogger.
Can anyone explain how to make a trend that can show historical data.