Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 395)

Publication AG-UM008C-EN-P - February 2005
Sample Ladder Logic E-13
If any values differ between the first five words of B3:0 and N7:0, copy B3:0-5 into N7:0-5, and trigger the MSG (which will write N7:0-5
to the Master).
0004
R6:0
FD
Comparison
Found Bit
COP
Copy File
Source
#B3:0
Dest #N7:0
Length 6
COP
MSG Write Buffer
U
MG9:0
EN
MSG
Enable
"Report-by-exception" write instruction to the Master. This MSG block is configured to write 6 elements ( words) from this Slave's Source File
N7:0, out channel 0, to the Master's (Target Node Address 0) Target Destination File N7:10.
0005 LBL
Q2:1
Jump to
MSG Rung
EN
DN
ER
MSG
Read/Write Message
Control
MG9:0
Setup Screen
MSG
Write MSG to Master
0006 END