Siemens SIMATIC S7 - Page 383

Program instructions
7.17 Timer
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
383
TONR retentive On-delay timer example
LAD
STL
10 ms TONR timer T1 times out at
PT = 1 s (100 x 10 ms).
Network 1
LD I0.0
TONR T1, +100
T1 bit is controlled by timer T1.
Q0.0 is ON after the timer accumulates
a total of 1 second.
Network 2
LD T1
= Q0.0
TONR timers must be reset by a Reset
instruction with a T address.
Reset timer T1 (current value and bit)
when I0.1 is on.
Network 3
LD I0.1
R T1, 1
Timing Diagram