Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 52)

3–29 Front Panel Editor
Publication 2706–816
The terminal can create an Historical Event (HE) Stack which is a
log of selected triggered messages, including their embedded
variable data.
•
Messages that have the HE Stack attribute enabled in the
MessageBuilder Software are logged to the Historical Event
Stack every time they are triggered.
•
Messages with this attribute disabled are not logged, no matter
how often they are triggered.
Note: A message is not necessarily displayed after it is triggered.
However it is logged if its HE Stack attribute is enabled, whether
displayed or not.
Certain messages require the terminal operator to acknowledge them.
If the Ack Time attribute is enabled for such a message, the time the
ACK button is pressed will be logged into the HE Stack as well as
the triggered time.
The date and time for each message is entered into the HE Stack as
follows:
Message
displayed
Message requires
acknowledgement
Ack Time
attribute
Date/Time Stamp
entered in the HE
Stack
No No Disabled when triggered
Yes No Disabled when triggered
Yes Yes Disabled when triggered
Yes Yes Enabled
when triggered,
also when
acknowledged
You can view the Historical Event Stack in either of two formats:
•
Frequency of Occurrence
The contents of the Historical Event Stack appear in descending
order of occurrences (maximum to minimum). This view displays
up to 100 of the most frequent message events.
•
Chronological Order
The contents of the Historical Event Stack appears in the order
the message occurred, oldest to newest message.
Note: The computer operator may also upload the HE stack using
MessageBuilder software. Before this can be done, the terminal must
be switched to the MessageBuilder option using the Change Port To:
menu item on the on the FPE. See Page 3–3.
Historical Event Stack