Siemens SIMATIC S7 System Manual page 382

Program instructions
7.17 Timer
TON self-resetting On-delay timer example
LAD
Timing Diagram
382
10 ms timer T33 times out after 1 s
(100 x 10 ms).
M0.0 pulse is too fast to monitor with
Status view.
The Compare contact becomes TRUE
at a rate that is visible in Status view.
Turn ON Q0.0 after (40 x 10 ms) for
40% OFF / 60% ON.
T33 (bit) pulse is too fast to monitor
with Status view.
Reset the timer with M0.0 after the (100
x 10 ms) period.
STL
Network 1
LDN M0.0
TON T33, +100
Network 2
LDW>= T33, +40
= Q0.0
Network 3
LD T33
= M0.0
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART