Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 387)

Publication AG-UM008C-EN-P - February 2005
Sample Ladder Logic E-5
The following two rungs are the MSG control rungs - they should be replicated for further messages. Set the MSG disable bit to prevent unnecessary
message retries to non-communicating nodes.
0001
B3:0
1
Disable
MSG #1
EN
DN
ER
MSG
Read/Write Message
Type
Peer-To-Peer
Read/Write Read
Target Device 500CPU
Local/Remote Local
Control Block N11:0
Control Block Length 14
Setup Screen
MSG
MSG #1 to Node #1
0002
N11:0
15
MSG #1
Enabled
N11:0
13
MSG #1
Done
N11:0
12
MSG #1
Error
B3:16
1
MSG #1
Finished
T4:0
DN
MSG
Delay
Done
U
N11:0
15
MSG #1
Enabled
0003
B3:0
2
Disable
MSG #2
EN
DN
ER
MSG
Read/Write Message
Type
Peer-To-Peer
Read/Write Read
Target Device 500CPU
Local/Remote Local
Control Block N12:0
Control Block Length 14
Setup Screen
MSG
MSG #2 to Node #2
0004
N12:0
15
MSG #2
Enabled
N12:0
13
MSG #2
Done
N12:0
12
MSG #2
Error
B3:16
2
MSG #2
Finished
T4:0
DN
MSG
Delay
Done
U
N12:0
15
MSG #2
Enabled
0005
B3:0
3
Disable
MSG #3
EN
DN
ER
MSG
Read/Write Message
Type
Peer-To-Peer
Read/Write Read
Target Device 500CPU
Local/Remote Local
Control Block N13:0
Control Block Length 14
Setup Screen
MSG
MSG #3 to Node #3