I/O CONTROLLOGIX MESSAGING EXAMPLE
PRODUCT REFERENCE GUIDE
343
Discrete Input Word
Bit
0 Unused
1 Unused
2 Unused
3 Unused
4 Unused
5 Unused
6 Unused
7 Unused
8-15 Unused
Reader:O Output Data
Tag Name Value Description
Reader:O.Data[0] Discrete Output Word See bit definitions.
Reader:O.Data[1]
Last Barcode Sequence Num-
ber Received
This field must be updated to
match the Bar Code Sequence
Nu
mber each time the bar
code data has been pr
ocessed.
Discrete Output Word
Bit Bit = 0 Bit = 1
0* Trigger Off Trigger On
1 – 7 Unused Unused
8* Reader Relay #1 Off Reader Relay #1 On
9* Reader Relay #2 Off Reader Relay #2 On
10* Reader Relay #3 Off Reader Relay #3 On
11* Reader Relay #4 Off Reader Relay #4 On
12-15 Unused Unused
I/O Messaging Ladder Logic Example
The rung of ladder logic below shows an example of how to update the Output data reg-
ister “Last Barcode Sequence Number Received” after new barcode data is present.
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