I have two ur5 robots, which each robot has two eth outputs and I am trying to connect via ssh from a central computer and one of them connects correctly but the other one doesn’t. I am trying to connect via ssh from a central computer and one of them connects correctly but the other one does not.
I have several questions, since within the same robot I have two eth cables, one connected to UR5 and the other to PLC, what does each one do? And if I put both with the same address would be wrong?
In one of the two arms for both connections I have the same address 192.168.0.20 and I get to make the connection via SSH but in the other arm having the same type of configuration that in the arm that if I let me, with both addresses in 192.168.0.10 does not let me establish the connection, I do not understand why.
On the other hand I would like to know what each connection eth is really in charge of.
Lastly I would like to ask about the arm that if it works correctly, when I run my programs I get an error of no buffer space available which I do not understand.
Thank you very much in advance and best regards.
Hello,
This can get complicated very quickly but, I feel, the path of least resistance is to connect the Ethernet port from each device (Robot, PLC, and Computer) to an unmanaged Ethernet switch with enough ports for each device you want to connect to. In your example you would need 4 ports minimum.
The critical thing is that each device (Robot, PLC, Computer) gets its own unique IP address like Robot 1 would be 192.168.0.20 and the other one would be 192.168.0.21. Most PLC’s that I’ve used default to 192.168.0.10 so you change that to match the robots or leave it if it’s the correct default.
Then hook your central computer up to the same Ethernet switch and set your central computer’s Ethernet IP address to something that matches the first three numbers of the robots (192.168.0.XXX), so 192.168.0.5 for instance.
I see in your question you can connect to one Robot via SSH but not the other one, so you understand that process. This should straighten out your network issues.
To answer the question about what each ethernet connection does, is a lot more complicated. This all depends on how you want the PLC to communicate to the Robots. Some options are Ethernet I\P, Modbus IP, or Discreet IO connections between the Robot and the PLC.
The “No Buffer Space Error” I’m not familiar with but a quick Google search provided a link to this forum ( Limit code amount - Technical Questions / Robot Communication - Universal Robots Forum ).
I hope this helps.
Kind regards,
–Jim