What happens if a motor phase wire is shorted to ground?

When a motor phase wire is shorted to ground, one of the immediate effects is that the controller detects this abnormal condition and responds accordingly. In this scenario, the system is designed to prioritize the safety and integrity of its components. By displaying an alarm message on the teach pendant, it alerts the operator or user to the fault condition. This notification is crucial for troubleshooting, as it indicates a specific issue—potentially preventing further damage to the motor or controller.

Other outcomes may include the potential for the motor to stop functioning due to the fault, but the primary action is the alarm signal which communicates the issue to the user. Additionally, while a reboot could theoretically occur in some systems, it typically would not happen automatically in response to a short-circuit fault; instead, the alarm serves as a warning that must be addressed before any corrective action is taken. Therefore, the alarm message is an essential feature for maintaining safe and effective operation within the FANUC control architecture.