Error while trying to add an OPC Classic device

[sperate]

Hi,

I’m having this message while trying to add an OPC remote server to rapid SCADA:

Error filling server list : CoCreateInstanceEx: RPC Server is not available

Something’s missing ?

[sperate]

Is ther some place in the configuration to specify the TCP port used by the OPC DA server ? Does the OPC Classic driver need this kind of information ?

Regards

[Mikhail]

Hi,

May be you need to install OPC Core Components (available on our website).
Also, you should configure access rights in DCOM settings, which can work unpredictable.
OPC DA does not need to specify TCP port.

Consider installing the Communicator service on the same machine as OPC server. Communicator can send data to SCADA-Server remotely. And configuration may be simplified.

[sperate]

I don’t have rights/acces to the machine on witch the OPC server is installed.

OPC Core Components is installed on the client side (RapidSCADA) => OK

Also, you should configure access rights in DCOM settings, which can work unpredictable. On server or client side ?

Many thanks !

[JurasskPark]

On server or client side ?

On the server side.
You must create a Windows account there, which will be identical in login and password. And give her rights to the computer, DCOM and OPC server.

[Mikhail]

You can use this simple utility for testing. Also try 3rd party OPC clients, such as Matrikon OPC explorer and Prosys.

[sperate]

Many thanks for your answers and the browseOPC software !
I was already using MatrikonOPC but Matrikon is asking for the server name in order to try to connect. As I don’t have the credentials and I am not allowed to access to the server, the administrator will provide me a sort of tunneler that will deal with all this DCOM/Windows credentials stuff and create a local instance of the OPC Server on the Client side (where RapidSCADA is installed).

[Mikhail]

Did you manage to connect?

[sperate]

Not yet as the server is not available right now but it should be ok with the tunneller.
I can see now the local instance of the OPC server created by the tunneler but I can’t connect to it to add tags because the server is not reachable.

I’ll keep you up to date.

• This reply was modified 1 year, 4 months ago by sperate.

[sperate]

Connection OK !!!

Very hard to deal with those OPC Classic servers

[Mikhail]

> Connection OK !!!
Nice!

> Very hard to deal with those OPC Classic servers
That’s true.

[Author]

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