ctrlX OPC UA client to a Rexroth IoT Gateway OPC UA server error DL_COMMUNICATION_ERROR

[ThibaultM]

Hello,

I need for an application to connect a ctrlX as an OPC UA client to an existing Rexdroth IoT Gateway as OPC UA Server.

I tested it OPC UA connection to the IoT Gateway with UA expert and it works fine : 

With following settings: 

Now, when I try to connect my ctrlX OPC UA client it does not work, I have always an error : DL_COMMUNICATION_ERROR: 

I searched on ctrlX user manual and alos with the question mark : (?) on the error but the description is empty :

I checked ctrlX log files and IoT gateway log files but I didn't find any information about this problem.

Here are  my client OPC UA settings : 

I tested from my ctrlX to ping the IoT Gateway and it works.

I checked if port  9999 is open and it is also ok.

I added (manually) on the IoT Gateway OPC UA server the certificate of my ctrlX client but it didn't improve the problem///

Where can be my mistake? Do you have any idea?

[CodeShepherd]

Are there any more information in the ctrlX CORE logbook? Could you please send us an export of all logbook messages or a system report directly after trying to establish connection?

The general error "0D0A0201 OPC UA status code of connected server" description can be found in the online documentation. I have to check why "OpcUa_BadCommunicationError 0x80050000" is missing.

[ThibaultM]

Hello,

Ok, so the error code 0D0A0201 is the interna ctrlX stauts code of connected server and error 0x80050000 is the standard error code of ther OPC UA server. I found follwing description : BadCommunicationError 

What does it mean?

After a connection try there is always the following error : 

If I filter logs informations with Entities : opcuaclient or Units : comm.opcua/client it is always empty 

I attached ctrlX log file downloaded executed just after tried connection at 15:07

Thanks for your help

[NoRisk4Project]

Hello,

I used the same settings like you

                          

and I can communicate between ctrlX CORE OPC UA client (version 1.20.0) and the OPC UA server of the IoT-Gateway (version 3.7.3).

After I trusted the certificate of the OPC UA client inside the IoT-Gateway server.

I guess, I also could reproduce your error 

by using a different IP address "192.168.1.22", instead of the IP address "192.168.1.21" of the IoT-Gateway.

Could you please check, if the ctrlX CORE can reach the IoT-Gateway on your selected IP address 192.168.3.58? Could you describe your network topology?

The wrong port could lead to the same error, but I see inside you screenshots, that the port "9999" is set inside the IoT-Gateway and the UA-Expert.

[ThibaultM · Accepted solution]

Hello,

Finally, I found the issue and it was a bad Windows firewall settings, I didn't open the right port number : 9999

No the OPC UA client connection from my ctrlX to the IoT Gatreway is working : 

Thanks for your help