Rockwell Automation 2706-P42_P43_P44_P72_P74_P92_P94 InView Marquee Message Display User Manual - Manual (Page 94)

Publication 2706-UM016D-EN-P - March 2006
4-28 InView Protocol
from ladder logic using the instructions below. There are three basic
steps that must be done to accomplish this. First, set the memory size.
Second, messages are then downloaded. Third, clear the queue.
It may be necessary to clear the memory in the display prior to
downloading of messages. This can be done either through a serial
transmission from the InView messaging software (2706-PSW1), or
ladder logic commands.
Download Three Messages Example
This example shows the display downloading three messages (with
three different priority levels). Setting the message size to 200 bytes
(0xC8) for each message.
1. Set message partition size in the display(s) to 200 bytes.
Transmission:
Transmission for Setting Message size to 200 Bytes (Example 1)
Response: NONE
2000 ms pause
2. Download three messages.
This step is accomplished with three separate transmissions to
the display, one for each message.
Beginning
of Frame ADDR FUNC H.O.
ADDR
L.O.
ADDR
DATA EOF Ready to rec.
resp
: FF 01 00 64 ^AZ00^BEa00C8^D CR LF
TIP
See section InView Display Communication Protocol
Functions and Descriptions on for further
explanation of the InView sign protocol being used.
TIP
The total number of bytes for each transmission
(from the Beg of Frame to Ready to rec. resp.) must
not exceed 500 bytes.