Rockwell Automation 2706-P42_P43_P44_P72_P74_P92_P94 InView Marquee Message Display User Manual - Manual (Page 93)

Publication 2706-UM016D-EN-P - March 2006
InView Protocol 4-27
Trigger the message that was just downloaded by activating the
message number that you want to preview in the message
queue.
Transmission:
Trigger Message for Viewing
Response: NONE
300 ms pause
4. Generate a heartbeat to view the message that was downloaded
(if the Heartbeat function has been enabled).
Use the heartbeat to provide serial activity so the message may
be previewed. Disabling the heartbeat causes the previewed
message to turn off after a 3 second internal time-out.
Transmission:
Transmission for Heartbeat
Response: NONE
500 ms pause between each heartbeat transmission
Download Messages
Messages can be downloaded to the display so that they can be
triggered (or activated) at a later time. The download of messages is
generally done using the InView messaging software, but can be done
Beginning
of Frame ADDR FUNC H.O.
ADDR
L.O.
ADDR
DATA LRC
Error
EOF Ready to
rec. resp
: FF 06 00 66 0001 94 CR LF
Beginning
of Frame Data EOF Ready to
rec. resp
: 00 CR LF
TIP
Send the Heartbeat every 500 ms until no longer
needed for the previewing of the message.