Allen-Bradley SLC 500 Series

Publication 1747-RM001G-EN-P - November 2008
12-6 SLC Communication Instructions
Figure 12.1 SLC 5/02 Messaging Example with MSG Timeout
U
N9:0
8
MSG_TO_BIT
0003
END
0002
N9:0
13
MSG_DN_BIT
N9:0
12
MSG_ER_BIT
U
B3:0
0
MSG_TRIGGER
N9:0
8
MSG_TO_BIT
0001
N9:0
14
MSG_ST_BIT
EN
DN
Timer On Delay
Timer T4:0
Time Base 1.0
Preset 5<
Accum 0<
TON
MSG_TIMEOUT
T4:0
DN
MSG_TIMEOUT/DN
L
N9:0
8
MSG_TO_BIT
0000
B3:0
0
MSG_TRIGGER
EN
DN
ER
Read/Write Message
Read/Write Read
Target Device 500CPU
Control Block N9:0
Control Block Length 7
Setup Screen
MSG
SLC_502_MSG