Allen-Bradley InView Marquee 2706-P42, User Manual

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Publication 2706-UM016A-EN-P - June 2002
InView Protocol 9-35
Priority Messaging using a Modbus ASCII Transmission
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 activated. This is an example sending a
Priority Message #0800 to all displays that are on the network.
Transmission:
Figure 9.51
T
ransmission for Priority Messaging
Response: NONE
Updating a Variable using a Modbus ASCII 06 Frame in Broadcast
Mode (Recommended)
This method writes (or loads) variable data to the appropriate variable
registers in all displays. The following is an example of loading
variable 20 (register 40020) with the value of 3656 for all displays on
the network.
Transmission:
Figure 9.52 Transmission to Update a Variable Register with 06 Frame Broadcast
Response: NONE
Updating a Variable using a Modbus ASCII 06 Frame in
Guaranteed Mode
This method writes (or loads) variable data to the appropriate variable
register in a specific display. The following is an example of loading
variable 32 (register 40032) with the value 612 in display address 005.
Transmission:
Beg of
Frame ADDR FUNC H.O.
ADDR L.O.
ADDR DATA LRC
Error EOF Ready to
rec. resp
: FF 06 00 66 0320 72 CR LF
Beg of
Frame ADDR FUNC H.O.
ADDR L.O.
ADDR DATA LRC
Error EOF Ready to
rec. resp
: FF 06 00 13 0E48 92 CR LF
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