[Cause]
During communication between the robot controller and welding equipment, if another PC attempts to communicate with the welding equipment, Arclink communication between the robot controller and welding equipment is reset. Communication between the PC and welding equipment is then established.
[Countermeasure]
The welding equipment cannot be operated from the robot controller until communication between the PC and welding equipment has ended. If no reset was requested, check the Arclink connection for problems.