TwinCAT HMI data historian explained with working sample.
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- เผยแพร่เมื่อ 4 พ.ย. 2022
- Step-by-step guide for developing TwinCAT data historian. This tutorial explains what is historian in the SCADA system and why it is used. How TwinCAT helps us to develop data historians quickly. A complete and working sample was developed along with PLC and HMI programs. The complete source code is available for download. We are sure you will like it. Please share the channel among your network and subscribe to our channel.
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Can i load old data from sql database to trend line ?
At least you should be able to do it by your own extension module.
Why do we use trend line and not just line chart? It's by necessity or by choice?
you choice, but I think scope is better
@@hemelixsystem1001 ok tanks,
We need to set the Historize Settings of the variable for being able to use the variable in this module. In my case I need to be able to change PLC for control different PLC with only one ihm, for that i use some structure which I instantiate for each need. But I can't set historize settings on my ST, do you know how i can do that ?
Otherwise, your tutorial is perfect, but I got some issue wen I want to use that for not taskNC axis, it's normale or I make a mistake ?
@@robinkss I think you can do it all in the HMI side. You can historize any variable that you need. Take a look in the text version. I did a bit ago, and if I want to anser correctly I need to recall it.
Do you know how to init the historisation with JavaScript for automatically historize many symbols?
@@robinkss I am not used but have you tried some thing like the following: "symbol": "TcHmiSqliteHistorize.Config::historizedSymbolList" Please take a look at www.hemelix.com/scada-hmi/twincat-hmi/twincat-hmi-historize-symbol/