Good afternoon everyone,

I am using a UR10 (CB series) with Polyscope 3.8 commanded by LabVIEW 2018 via Modbus. I have an issue with the Modbus communication because I am not able to set a coil to a certain value (I don not have any problems with registers) commanded by the computer on which LabVIEW runs.
On LabVIEW (master) I give the robot the command to set the value stored in coil 16 from False to True on the robot (slave). By setting the channel on the installation tab on the Teach Pendant, I can see that the coil turns to True, but immediately after it, it goes back to a False state without giving it any commands and I can't understand why this happens. I am not even running the program written on the Teach Pendant, but just checking if the communication between the robot and the computer works properly from the MODBUS section in the installation tab and I know that the LabVIEW code works well. I would like to point out that this problem is solved when I restart the robot, but this works only when I write once the value on the coil 16, after that I face the problem described above.
I face the same issue also with other coils of the robot such as 17, 18, 19, etc... Does anyone know what can be the reason of such a problem?

Thank you very much for your help

Best regards

Andrea