Owners Manual
2800 Series Marquee
2.9 Tutorial #6, Recalling Stored Messages
To make the marquee display a stored message, use the stored message recall command diagrammed below.
Address Header Entry
Start
Number
Start
Location Number Recall
Msg
End
Entry
CTRL-B A ESC CTRL-N 0 0 1 CTRL-B CTRL-E
02h 41h 1Bh 0Eh 30h 30h 31h 02h 05h
The address header section gets the attention of the marquee. The entry start section tells the marquee to
prepare to receive an entry. The number start section tells the marquee that the entry will be a three digit location
number. The location number section supplies the three digit location number (001 to 242). The recall message
section tells the marquee to recall a stored message. The previously supplied location number specifies which
stored message to recall. The end entry section tells the marquee that the entry is complete.
After sending the above recall message command, the marquee will display the message you saved in stored
message buffer 001, in tutorial #5.
Now recall stored message buffer 002, using the command diagrammed below.
Address Header Entry
Start
Number
Start
Location Number Recall
Msg
End
Entry
CTRL-B A ESC CTRL-N 0 0 2 CTRL-B CTRL-E
02h 41h 1Bh 0Eh 30h 30h 32h 02h 05h
At this point, two different things could happen depending on whether message queuing is enabled or disabled. If
message queuing is enabled, the marquee maintains a queue of recalled messages and automatically displays
all of them in a round robin fashion. In which case the marquee will alternate between displaying stored
messages 001, and 002. Alternatively, if message queuing is disabled, each time a message is recalled,
previously recalled messages are cleared. In which case the marquee will only display stored message 002.
Try enabling and disabling the message queuing feature, using the commands diagrammed below and then recall
a few stored messages to observe the differences in behavior.
Enable Queue: Disable Queue:
Address Header Enable
Queue
Address Header Disable
Queue
CTRL-B A CTRL-Y CTRL-B A CTRL-O
02h 41h 19h 02h 41h 0Fh
Note: The queue enabled/disabled setting is stored in EEPROM memory and survives power cycling the
marquee. However, the message queue is stored in RAM and is cleared when power is lost or the marquee
reboots.
PB-2149-335B Page 21
(9 paginas)
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