OPC LabView Real-time support

[protocol]

Hello,

what is the state of OPC support on LV RT platform?

To my knowledge OPC is based on COM/DCOM Windows API that is not available on LV-RT.

So there is no way to have point-to-point (not via NI-PSP and SVE on Win) communication between LV-RT and OPC client/server, right?

Thanks.

[viSci]

Well, other than NSV binding, there does not appear to be a direct RT based OPC solution. It is interesting to note the Wind River does offer a VxWorks OPC driver

so any RT target such as cRIO should be able to theoretically work. Another possibility might be to see if the OPC data is available as ModBus over TCPIP, Profibus

or even Ethernet/IP for such devices as AB PLC's.

[protocol]

Thanks for an answer.

I was looking further at "new" NI-PSP, UDP based protocol (for monitoring).

Does it really solve network congestion and packet loss?

Regards.

[viSci]

I think the new PSP is very efficient. Read the white paper on the subject, it gives you pretty accurate performance characterizations.