Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 60)

Chapter 2
Operating the Control
2-40
After the cause of a machine or system message has been resolved, some
messages remain displayed on all screens until cleared.
ATTENTION: Not clearing the old messages from the screen
can prevent messages that are generated later from being
displayed. This occurs when the old resolved message is of a
higher priority than the newly generated message. The new
message is still displayed on the message display screen as an
active message, but does not appear in the message area (line 1)
of other screens.
Clear active messages from the screen in the following ways:
If you want to: Then press the:
clear the most recent active messages one at a time [CAN] key
Clear all active messages from the error message display screen {CLEAR ACTIVE}
softkey
(softkey level 2)
ERROR
LOG
CLEAR
ACTIVE
Important: Clearing active messages does not correct the problem that
caused the error; it only clears the message from the active file.
2.10.1
Clearing Active Messages
{CLEAR ACTIVE}