Chapter 6 PLC Programming 119
Latch #1
Latch #2
Pushbutton #1
Unlatch #1
L1 L2
Latch 1
G
Switch #2
Switch #1
Pushbutton #2
Unlatch #2
Green light
Latch 2
R
Red light
+120 V
I0
I1
I2
I3
I4
I5
I6
I7
I8
I9
I10
I11
Input ports
Common
O0
O1
O2
O3
O4
O5
O6
O7
Output ports
Switch #1
Switch #2
Pushbutton #1
Pushbutton #2
R
G
Green light
Red light
Figure 6-23. Latch and unlatch instructions.
Figure 6-24. Input/output connections for Figure 6-23.