Allen-Bradley InView Marquee 2706-P42, User Manual

Page: 170 / 212

Publication 2706-UM016A-EN-P - June 2002
9-34 InView Protocol
Figure 9.48 Transmission for Add/Remove a Message
Response: NONE
Priority Messaging using a Modbus ASCII Query (Recommended)
This method writes to the first register in the Message Queue (40103).
When this happens, the previous message in the queue is replaced
with the new message to be loaded.
This is an example of sending a Priority Message #0099 to display
address 001.
Transmission:
Figure 9.49 Query for a Priority Message
Response:
The normal response to a function 06 is to echo (or re-transmit) the
query after the holding register is updated.
Figure 9.50 Response for a Priority Message
Beg of
Frame ADDR FUNC H.O.
ADDR L.O.
ADDR QUANTITY BYTE CNT DATA
: FF 10 00 64 0002 04 0003 0002
LRC
Error EOF Ready
to rec.
resp
7E CR LF
Beg of
Frame ADDR FUNC H.O.
ADDR L.O.
ADDR DATA LRC
Error EOF Ready to
rec. resp
: 01 06 00 66 0063 30 CR LF
Beg of
Frame ADDR FUNC H.O.
ADDR L.O.
ADDR DATA LRC
Error EOF Ready to
rec. resp
: 01 06 00 66 0063 30 CR LF