Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 222)

Publication AG-UM008C-EN-P - February 2005
6-18 Configuring MicroLogix 1000 Controllers
Figure 6.4 Message Timeout Ladder Logic
Example MSG Control Blocks
0000
B3:0
0
MSG
Trigger
N7:90
13
MSG
Done
N7:90
12
MSG
Error
S2:0
11
Active
Protocol
U
N7:90
15
MSG
Enable
N7:90
8
MSG
Timeout
U
N7:90
8
MSG
Timeout
U
B3:0
0
MSG
Trigger
0001
N7:90
14
MSG
Start
N7:90
13
MSG
Done
N7:90
12
MSG
Error
EN
DN
TON
Timer On Delay
Timer
T4:0
Time Base 1.0
Preset 10<
Accum 0<
TON
MSG Timeout Timer
T4:0
DN
MSG
Timer
L
N7:90
8
MSG
Timeout
0002 EN
DN
ER
MSG
Read/Write Message
Read/Write
Write
Target Device 500CPU
Control Block N7:90
Control Block Length 7
Setup Screen
MSG
Write MSG to Master
0003 END
Application See Page
MicroLogix 1000 write message to a PLC-5 processor Figure 6.5 6-19
MicroLogix 1000 read message to a PLC-5 processor Figure 6.6 6-20
MicroLogix 1000 write MSG to either MicroLogix, SLC 500
or Logix controller Figure 6.7 6-21
MicroLogix 1000 read MSG to either MicroLogix, SLC 500
or Logix controller Figure 6.8 6-22