Rockwell Automation 2706-LV2P_LV2R_LV4P_LV4R DL40 PLUS USER MANUAL - Manual (Page 55)

Offline Operating Modes 4–2
Publication 2706-6.1
Putting Messages on the Stack
•
Requires the Message Attribute to be set using the Onboard
Editor or Offline Programming Software for each message you
want on the stack.
•
Messages are put on the stack with variables and ASCII Input
included.
•
Variables in a message are put on the stack as soon as they are
received by the DL40 Plus. An additional stack entry for a
message is made if:
– an updated variable is received for a variable already on the
stack and more than 2 seconds elapse between receiving the
original variable and the updated variable.
– if less than 2 seconds elapse, the original variable put on the
stack will be overwritten by the updated variable.
•
Messages can be be put on the stack with time & date stamping.
•
Messages are put on the Historical Events Stack each time they
are triggered.
Note: Bit Trigger Run Mode Only – The Bit Trigger Table is put
on the stack as soon as it is received by the DL40 Plus. Each time a
message with the stack attribute set is displayed or redisplayed, an
entry for that message is put on the stack.
Time and Date Stamping of Messages Put on the Stack
•
Requires the Message Attribute to be set using the Onboard
Editor or Offline Programming Software for each message you
wish to stamp.
•
The real time clock value is added to message data on the stack
when:
– a message is run
– a message is triggered (if it is never run)
– a message is triggered and if the time between triggering and
running is more than 1 minute
– if an additional stack entry is made because variable data is
updated (see above)
– a message is acknowledged