Rockwell Automation 2755-SNx Adaptascan Bar Code Readers - Manual (Page 81)

4–25 Downloading Match Codes via DH485 Protocol with an SLC 5/03
t
or SLC 5/04
t
Controller
Publication 2755-6.8
Viewing Match Code Downloads in Master Mode via Ladder
Logic
Use the following SLC ladder logic for DH485 Master Mode if the
AdaptaScan I/O LEDs cannot be used for viewing.
Read/Write
Read/Write:
Type:
Target Device:
Local/Remote:
Control Block:
Control Block Length:
WRITE
PEER-TO-PEER
485CIF
LOCAL
N7:100
14
B3
0
] [
Message Instruction Configuration
Parameter Configuration
Type Peer-to-Peer
Read/Write Write
Target Device 485CIF
Local/Remote Local
Control Block N7:100
Channel 0
Target Node 2
Destination File Access N7:200
Target Offset 255
Message Length in Elements 10
Message Timeout (seconds) 10
Place the Match Code Hex command (Byte Swapped) in the
Destination File Address N7:200.
•
example bar code string = 0300
•
0300 converted to hex = 30333030
•
ASCII Hex command = 3F10CE010003040030333030
Byte Location 0 1 2 3 4 5
Byte Swapped N7:200 103F 01CE 0300 0004 3330 3030