Allen-Bradley SLC 500 Series

Publication 1747-RM001G-EN-P - November 2008
11-26 Understanding Interrupt Routines
Ladder Diagram for the Bottling Application
0000
INT
I/O Interrupt
INT IIM
Immediate Input w/Mask
Slot I:1.0
Mask 0064h
Length 1
IIM
0001
I:1
8
1746-IA16
Cap Proximity
I:1
0
1746-IA16
Bottle Proximity
U
O:2
0
1746-OW8
Chute Open
IOM
Immediate Output w/Mask
Slot O:2.0
Mask 0001h
Length 1
IOM
0002
I:1
8
1746-IA16
Cap Proximity
L
O:2
0
1746-OW8
Chute Open
IOM
Immediate Output w/Mask
Slot O:2.0
Mask 0001h
Length 1
IOM
0003
e
e
e
e
RET
Return
RET
0004
END
DII Example 4
The following program will demonstrate a DII.
The following values need to be loaded into S:33/8 (1), S:46 (3), S:47 (1), S:49 (1) and S:50 (1) in the DII setup.
This will guarantee that subroutine (3) will be executed every time that I:1.0/0 is true.