Appendix 4.1
1.
When X100 turns on, Y170 turns on. When X101 turns on, Y170 turns off.
X100
0
X101
2
2.
When X102 turns on, Y171 turns off if Y170 is on, or turns on if Y170 is off. This flip-flop operation is repeated.
X102
T1
0
T0
6
T0
12
14
Program Examples
Flip-flop ladder
Contact T0
Y171
RST
Y170
K5
T0
K5
T1
Y171