Spectrum Controls InView Series User Manual page 92

4-28 Chapter 4: InView Protocol
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User's Manual 0300277-02 Rev. D
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 is as follows:
Query for a Priority Message
H.O L.O
ADDR ADDR
06 00 66
Response:
The normal response to a function 06 is to echo (or re-transmit) the query after
the holding register is updated.
Response for a Priority Message
H.O L.O
ADDR ADDR
06 00 66
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 is as follows:
Transmission for Priority Messaging
H.O L.O
ADDR ADDR
06 00 66
Response: NONE
Update 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 is as follows:
LRC
DATA
Error
0063 30
LRC
DATA
Error
0063 30
LRC
DATA
Error
0320 72
Ready to rec.
EOF
response
CR LF
Ready to rec.
EOF
response
CR LF
Ready to rec.
EOF
response
CR LF