Communication from Labview(the OPC client) to citect(OPC server)

[Parny · Accepted solution]

Hi All,

Just an update:

I am able to read the tags from the Citect system(v5.42 R0) in LabVIEW 8.6 using 'databinding' method as shown in the below picture, using the specified OPC URL in the path text box, although browse2opc.vi is unable to browse and reach the Citect tags. The major hurdle was sorting out the DCOM configurations on the Citect system,security permissions(this varies from domain to non-domain account status of the LabVIEW PC) with the help of the Citect engineer.

Hope this helps.

P.S. I am communicating from LabVIEW(OPC client) to Citect(OPC server), not the other way around.

[Naqqash]

Hi Parny,

I am trying to interface Siemens Building Automation controller using Bacnet with LabVIEW. Before I've done the interfacing for LabVIEW and Siemens PLC but there the advantage was that the driver for the Siemens PLC is already there in NI OPC server but for these devices there is no driver.

I am doing exactly the same as you did. But I've few problems. As you also said using browse2opc.vi I can not connect to citect so i can not reach the tags. I've tried different opc servers e.g cimetric opc for bacnet (demo) and by using data binding it worked, the advantage was was it reads the tags automatically once it gets connected with the device.However, the disadvantage is I can not read more then 30 tags as it is demo version. The only problem for me at the moment is how can i access these tags or import them in citect,do you have any idea about it?.

[Parny]

Hi Naqqash,

I am not sure how to import tags into Citect as I was working in LV by importing from Citect using the OPC URLs.

All my tasks were importing data from Citect, never done the other way.