Rockwell Automation 2706 DL40 HARDWARE USER MANUAL - Manual (Page 114)

Chapter 10
Using Remote I/O
10 – 22
In this mode, messages are continually being displayed by the DL40. There
is no need to trigger a message which is already in the list. Messages can,
however, be dynamically added to or deleted from the
Message List . In
addition Priority Message Numbers can be sent.
Discrete I/O
Adding or Deleting Messages and/or Triggering a Priority Message
WORD 1
17 16 15 14 WORD 0
Handshake Bit
Output Image Table
Add/Delete Bit
Priority Message Number
WORD 2 Always Empty
WORD 3
WORD 4
WORD 5
WORD 6
WORD 7
Message Number
Always Empty
Always Empty
Always Empty
Always Empty
Always Empty
Full rack
1/4 rack
1/2 rack
3/4 rack
Messages can be added or deleted while Priority Messages are being
triggered. If you want to trigger a Priority Message but do not want to change
the Message List, you must set
Message Number (in word 1) to 0.
Return Message Number and ASCII Data for
Message Being Displayed and Length of Message List to PLC
WORD 1
17 16 15 14
Message Number
WORD 0
Enter Bit
Input Image Table
WORD 2
WORD 3
ASCII Character 1
Acknowledge Bit
Clock/Date Data Bit
Diagnostic Code
ASCII Character 3
ASCII Character 2
ASCII Character 4
WORD 4
WORD 5 ASCII Character 7
ASCII Character 6
ASCII Character 8
ASCII Character 5
WORD 6 ASCII Character 10 ASCII Character 9
Length of Message List
Handshake Bit
Full rack
1/2 rack
3/4 rack
WORD 7 ASCII Character 12 ASCII Character 11
Message List Run Mode