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Hi,
Did you watch this video and subsequent?
I am sure that I can write with this method: IOPCSyncIO::Write
To do this, the OPC driver have to be redesigned using another OPC client library.
This is possible. However, I suppose that it would be much cheaper if the OPC server developer supports WriteVQT.What communication protocol do you use?
Are there alternative OPC servers?
Can you find OPC UA server? OPC UA .NET API is officially free.What recommendations are you referring to?
First of all, copy here your actual communication log where we can see sending a command.
If the PLC answer OK, you can:
1. Compare binary packets with other software that works well.
2. Contact the manufacturer for support.Try this dll.
Also, is there a way of recording only one condition of the event?
Currently no. Some modifications should be done to implement it.
Hi,
Event color depends on status color of the input channel. I mean you should change colors of Off-On values.
Create your own record in the Units table, for example,
Normal; Alarm; –
And use formulas for setting the status of the input channel:
Cnl; Cnl > 0 ? 114 : 13Hi,
Read this dialog about building the project.
You should use the existing components as examples. Gauge and level components already available here.
Here on the forum I can answer particular technical questions. Be free to ask. Detailed individual lessons are available for a fee.
Thank you for the screenshots. I will send you a special version of the OPC driver and we can check again and compare info from OPC analyzer.
Is it possible to write with IOPCSyncIO::Write?
I don’t think that this is possible.
In the source code of KpOpc.dll driver I just use daServer.Write(new Opc.Da.ItemValue[] { itemVal }); and the library made by OPC Foundation choose lo-level method WriteVQT.I can try setting Quality field of the item being written.
