I’m having significant problems getting the internal modbus client to talk to external modbus servers.
I can establish the modbus connection between the parts and the robot confirms that the connection is established. BUT I can NOT write any new values to registers in the external modbus server.
I’m getting a suspicion that the UR modbus client only supports a subset of the modbus protocol.
Can You list the modbus function codes that the UR implementation supports?
BTW. The device I’m trying to connect to is a FESTO CTEU-EP.
This help article has information on what function codes and exception codes the system works with, https://www.universal-robots.com/how-tos-and-faqs/how-to/ur-how-tos/modbus-server-16377/
I know we did some work with a Festo motion controller earlier in the year and I believe we struggled to get it working, in the end we returned it and used another solution.
Hi John, I’m trying to do the same thing as you. Did you succeed and if so, how did you establish the connection or how do you switch the valve terminal?