USER MANUAL Manual

Remote I/O Communications 8–36
Publication 2706-6.1
Return Message Number (Discrete I/O)
The following shows the format of the return message number when
using discrete I/O bit triggering.
WORD 1
17 16 15 14WORD 0
Input Image Table
WORD 2
WORD 3
Always Returned Empty
Acknowledge Bit
Clock/Date Data Bit = 0
Diagnostic Code
WORD 4
WORD 5
WORD 6
Handshake Bit
Full rack
1/2 rack
3/4 rack
WORD 7
Message Number
Always Returned Empty
Always Returned Empty
Always Returned Empty
Always Returned Empty
Always Returned Empty
Return Clock or Date Data to PLC (Discrete I/O)
The following shows the format of discrete I/O clock/date data
returned to the PLC in Bit Trigger mode.
WORD 1
17 16 15 14WORD 0
Handshake Bit
Input Image Table
Add/Delete Bit = 1
WORD 2 Always Empty
WORD 3
WORD 4
WORD 5
WORD 6
WORD 7
Always Empty
Always Empty
Always Empty
Always Empty
Always Empty
Full rack
1/4 rack
1/2 rack
3/4 rack
Diagnostic Code Hour/Month
Minute/Day Second/Year