Siemens Simatic S7 Series

Program instructions
7.17 Timer
S7-200 SMART
340 System Manual, 09/2015, A5E03822230-AC
TON self-resetting On-delay timer example
LAD
STL
10 ms timer T33 times out after 1 s
(100 x 10 ms).
M0.0 pulse is too fast to monitor with
Status view.
Network 1
LDN M0.0
TON T33, +100
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.
Network 2
LDW>= T33, +40
= Q0.0
T33 (bit) pulse is too fast to monitor
with Status view.
Reset the timer with M0.0 after the (100
x 10 ms) period.
Network 3
LD T33
= M0.0
Timing Diagram