Rockwell Automation 2706 DL20 SERIES G USER MANUAL - Manual (Page 56)

Chapter 5
Run Mode
5–8
Special Message #6: Stop Printing HE Stack
Special message #6 stops the printing of the Historical Event (HE) Stack.
Special message #6 terminates the printout, but whatever message is
currently being printed prints out in its entirety. Normal message run mode
resumes when printing ends.
Printing of the stack with special message #5, stopping printing with message
#6 and restarting printing again with special message #5 causes the stack to
be printed out again from the beginning. This allows you to obtain duplicate
copies of the messages in the HE Stack. Printing messages does not remove
them from the HE Stack.
Special Message #7: Clear HE Stack
There are only two ways to remove messages from the HE Stack. One is to
exit the run mode. The other is to trigger special message #7. Triggering
special message #7 immediately causes the contents of the HE Stack to be
cleared. If messages are being printed from the HE Stack, the DL20 will
resume the run mode as soon as printing of the stack is finished, but will not
clear the stack.
Special Message #8: Resume Run Mode
Special message #8 enables the DL20 to start unqueuing and displaying
messages from the message trigger queue if special message #9 had
previously been triggered. Special messages #8 and #9 are related to
dynamic chaining. Also use special message #8 to resume the run mode if
special message #12 had previously been triggered (interactive clock setting).
Special Messages