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04/30/2018
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Hi all,
I’m trying to open up a connection to a public OPC-UA server through UaExpert, but I cant get it to work. I just copy/paste the adress in the add server, but get a BadCommunicationError responce back form the UaExpert whenever I try to open the connection. Is there something I’m missing when setting it up? do I need to add anything else except the adress?
http://www.opclabs.com/resourc…..a-server-2
https://github.com/node-opcua/…..UA-servers
Thanks
05/30/2017
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This works for me with the latest UAExpert:
opc.tcp://opcua.demo-this.com:51210/UA/SampleServer
04/30/2018
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Thanks,
Unfortunately, I can’t get it to work. It’s probably something simple I forgot to do. Anyways, as you can see from the picture, I get a “could not connect to server: BadCommunicationError” message
05/30/2017
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Could be a network firewall issue.
02/24/2014
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Randy is most likely right.
I am the person who runs this public server. It works for me now, and I am not aware of any longer downtime recently.
You can try connection using our Connectivity Explorer tool, http://www.opclabs.com/product…..y-explorer . If it does not connect, right-click on the server endpoint and select “TCP Connect Test”. This will try to open a simple TCP connection to the server, without any OPC UA involved. If the TCP Connect Test fails, it would be almost definitely a firewall issue.
Regards
09/07/2021
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Dear,
The opc.tcp://opcua.demo-this.com:51210/UA/SampleServer works fine for me! 🙂
Now I want to acces my own remote OPC UA Server.
I have a PLC attached to a router with a static IP-Address.
IP Address PLC: 192.168.1.10
IP Address router: 178.229.83.190
OPC UA port 4840 ? This port worked while the PLC was attached to my office network.
How can I acces my PLC via UaExpert?
Thanks in advance!
Kind regards,
Joost Merks
05/30/2017
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if you can ping 192.168.1.10 from a console on your PC then you can simple construct a URL that looks like:
opc.tcp://192.168.1.10:4840/
If you have a NAT firewall then the firewall must be configured to forward packets on port 4840 to 192.168.1.10
In this case, when you enter the firewall URL into the server list (opc.tcp://178.229.83.190:4840/), UAExpert should warn you of mismatch between the server endpoints and the URL that you actually used. You can ignore these warnings.
09/07/2021
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Hi,
I guess I wasn't quite clear,
Well my PC with visualisation software (UaExpert) is located on my laptop in the office.
The machine with PLC (OPC UA Server) and Router with Sim-Card are located in the field, so they are not on the same network.
The machine works on solar panels and for this reason must also be energy sufficient. This means that the router + PLC will go to sleep mode every 15 min, afther which they connect to the internet again to send and receive data.
First,
I tried to connect the PLC directly via ethernet to my PC. This UA Connection worked inmediately fine.
Now,
I added a router. So, the PLC is now connected to the router via a ethernet cable. and the PC (is not connected to the router by any hardware) can Ping to the IP Address of the sim card of the router.
Last step,
Is to place the IP address of the router in UaExpert on my PC after which (I thought) that I would be able to click ‘through’ the router > PLC > OPC UA Variables.
But this last step isn’t working, when I fill in the IP address of the router in UaExpert I get no options to add the PLC data in the UaExpert Data Access viewer.
So that’s the problem I didn’t manage to solve yet. Hope u can help me.
In my router I’ve configured my NAT firewall like this:
At the tab NAT:
Public Port(s) Private Port(s) Type Server IP Address Description
4840 4840 TCP 192.168.1.10 TestPhoenix1
I do also have a tab named FireWall with “Enable filtering of incoming packets” and “Enable filtering of forwarded packets” Do I also have to set someting in here?
If you could mail me, i can send extra pictures of the GUI by email.
Thanks in advance!
Kind regards,
Joost Merks
Mail: jja.merks@student.avans.nl
Eindhoven, Netherlands
[Image Can Not Be Found]
05/30/2017
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Use the Add Server… window in UAExpert
Click on “Custom Discovery”
Enter the router URL: opc.tcp://178.229.83.190:4840/
You should connect to the PLC and get a warning that the endpoints don’t match the URL.
Accept this. You should be able to connect.
09/07/2021
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Hi Randy,
I tried your suggestion but when I start to search I get:
“Discovery GetEndpoints on opc.tcp://178.229.83.190:4840 failed (BadTimeout).”
“Discovery FindServersOnNetwork on opc.tcp://178.229.83.190:4840 failed (BadTimeout). falling back to FindServers
“Discovery FindServers on opc.tcp://178.229.83.190 failed (BadTimeout).”
Tried to find it with and without the port.
Ping on this IP is working.
Do you maybe know what I could try more?
Joost
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