Rockwell Automation 9323-PA1E USER MANUAL APS 6.0 User Manual
Page 67
Ladder Logic Program Basics
4–13
The diagram above is the same one that appears on the
preceding page. This diagram is also represented below,
with each instruction replaced with a T or F, indicating the
initial True/False status of the instruction.
The table at the right indicates how the instructions are
executed when XIC instruction I:0/1 changes state. (I:0/1
represents an external momentary contact push button.)
T
T
F
F
T
T
T
T
F
T
T
T
T
]/[
B3
10
] [
I:0
1
( )
B3
11
( )
B3
12
] [
B3
11
]/[
B3
12
]/[
B3
10
( )
O:0
2
( )
B3
10
] [
I:0
1
] [
B3
11
] [
B3
11
] [
I:0
1
T
F
T
F
T
F
T
T
T
T
T
T
T
F
T
F
F
F
T
T
F
F
F
F
F
F
Instruction Execution
T = true at time of execution
F = false at time of execution
XIC
I:0/1
Goes
True
Goes
False
Scan 1000
Scan 1001
F
F
T
F
F
F
T
T
T
F
F
T
T
F
T
T
F
F
T
T
T
T
F
F
T
T
Scan 2000
Scan 2001
T
T
T
T
T
T
F
F
T
T
T
F
F
T
F
F
F
T
F
T
F
F
T
T
F
F
Scan 3000
Scan 3001
F
F
F
F
F
F
T
F
F
F
F
F
F
F
T
F
F
F
T
T
F
F
F
F
F
F
Scan 4000
Scan 4001
Goes
False
Goes
True