[Cause]
Arc welding was executed or welding equipment settings were changed while the controller could not communicate with the built-in welding power source, for example after changing the controller communication port setting for ROBOWELD or following a communication alarm.
[Countermeasure]
If the communication settings were changed, restore the previous settings so that communication with ROBOWELD can resume. If a communication alarm occurred, take its countermeasures and then clear the alarm.