Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 49)

Using Special Messages 3–4
Publication 2706-6.1
908 (or 08) View Historical Events Stack
Displays messages placed on the Historical Events Stack but does
not clear the Historical Events Stack. Messages are displayed one at
a time in Chronological Order as described in Historical Recall. To
see the next message on the stack, press any key on keyboard or
[SELECT ] or [
↵
] push button.
After last message DL40 Plus will display:
END OF H.E. STACK PRESS ANY KEY
This message is put at the end of the queue and only runs after all
messages before it have run.
Press any key on the keyboard or [SELECT] or [
↵
] push button to
return the DL40 Plus to the run mode
Note: After one minute, the DL40 Plus display returns to Run mode.
To cease viewing the stack:
•
trigger Special Message 901, 903, 904, or 915
•
from keyboard–press [ESC]
•
from front panel–press [MSG ACK]
•
exit Run mode
909 (or 09) Clear Historical Events Stack
This special message clears the Historical Events Stack of all
messages put on the stack before it was run. This message is put at
the end of the queue and only runs after all messages preceding it
have run.
Important: Once this message is running, it cannot be stopped. If it
has not yet started to run, it can be stopped by triggering
special message 902.