Answer: A. ALARM
Question Answer Reason Analysis:
The English abbreviation of the function key on the alarm information display page is ALARM.
What is the function key of the alarm message display page?
The function key of the alarm information display page refers to the button used to display the alarm information of the machine tool.
Through this button, the operator can enter the alarm page and view the alarm information of the machine, including the alarm number, alarm type, alarm description, etc.
At the same time, you can also use this button to clear alarms and switch log pages.