Rockwell Automation 2706 DL40 HARDWARE USER MANUAL User Manual
Page 50
Chapter 6
Other Operating Modes
6 – 4
If a variable is called for but no variable is available, the message will be put
on the Historical Events Stack with symbols replacing variables:
*
for
[CTRL][
V
]
variables
@
for
[CTRL][
W
]
variables
^
for ASCII Input Data using
[CTRL][
X
]
Press any key on the keyboard or the
[SELECT]
or
[ENTER ]
push button
on the front panel to scroll through the stack entry for a message. After you
have scrolled through the entry, pressing any key on the keyboard or the
[SELECT]
or
[ENTER]
push button on the front panel will bring up the next
entry.
Pressing
[ESC]
or
[MSG ACK]
returns you to the
CHRONOLOGICAL
prompt.
After the last event is displayed, the DL40 will display:
END OF H.E. STACK
PRESS ANY KEY.
When the Historical Events Stack is viewed in chronological order in Bit
Trigger mode, the Bit Trigger Tables on the Historical Events Stack will be
displayed in chronological order. The newest information placed on the stack
will be displayed first; the oldest will be displayed last. A new Bit Trigger
Table will be put on the stack only when the state of one or more bits in
either the Priority Section or the Round Robin Section is changed. To view
the next stack entry, press any key on the keyboard or the
[SELECT]
or
[ENTER]
push button on the front panel.
Note: If you entered this mode via the DL40 Keyboard Port, you must
continue to use the DL40 Keyboard Port; if you entered via the front panel
push buttons, you must continue to use the front panel push buttons.
All messages (with stack attribute set) in the Bit Trigger Table that were
actually displayed will be shown first. They will be in the same format as
messages for other Run Modes. Following these messages will be the Bit
Trigger Table.
Stack data for the Bit Trigger Run Mode is displayed in the following format
(data put on stack last will be displayed first):
–
List of Round Robin messages that were run
MESSAGE #
Message Text
RAN
hour:minute:second month date year*
–
List of Priority Section messages that were run
MESSAGE #
Message Text