USER MANUAL Manual

Remote I/O Communications 8–21
Publication 2706-6.1
Return Message Number and ASCII Data (Discrete I/O)
The following shows the format of discrete I/O data returned to the
PLC in Message/Variable/Slave run mode. This data may include
both the message number and message text.
WORD 1
17 16 15 14
Message Number
WORD 0
Handshake Bit
Input Image Table - 1/4 rack
Acknowledge Bit
Clock/Date Data Bit = 0
Diagnostic Code
WORD 1
17 16 15 14
Message Number
WORD 0
Handshake Bit
Enter Bit
Input Image Table - 1/2 rack
WORD 2
WORD 3
ASCII Character 1
Acknowledge Bit
Clock/Date Data Bit = 0
Diagnostic Code
ASCII Character 3
ASCII Character 2
ASCII Character 4
WORD 1
17 16 15 14
Message Number
WORD 0
Handshake Bit
Enter Bit
Input
Ima
g
e
Ta
b
le
-
3/4
rac
k
WORD 2
WORD 3
ASCII Character 1
Acknowledge Bit
Clock/Date Data Bit = 0
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 1
17 16 15 14
Message Number
WORD 0
Handshake Bit
Enter Bit
Input Image Table - Full rack
WORD 2
WORD 3
ASCII Character 1
Acknowledge Bit
Clock/Date Data Bit = 0
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
WORD 7 ASCII Character 11
ASCII Character 10
ASCII Character 12
ASCII Character 9