Rockwell Automation 2706-P42_P43_P44_P72_P74_P92_P94 InView Marquee Message Display User Manual User Manual
Page 100
Publication 2706-UM016D-EN-P - March 2006
4-34 InView Protocol
information received. The following is an example of adding message
#0003 and removing message #0002 from the message queue.
Transmission:
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:
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.
Beginning
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
Beginning
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