Timer Example - Siemens Simatic S7-200 CPU 210 System Manual

Timer Example

I0.2
T1
>=I
+3
I0.2
T1 (current)
Q0.2
Figure 5-3 Example of the Timer Instruction
M0.0
/
T0
>=I
+30
Figure 5-4 Example of an Automatically Retriggered One-Shot Timer
S7-200 Programmable Controller, CPU 210
C79000-G7076-C235-01
LAD
T1
IN TON
0 PT
Q0.2
Timing Diagram
T1 >= 3
LAD
T0 Network
LDN
IN TON
TON
0 PT
Network
LDW>=
M0.0
=
STL
Network
LD I0.2
TON T1, 0
Network
LDW >= T1, 3
= Q0.2
T1 >= 3
STL
M0.0 //Enable/disable the timer
T0, 0 //Select timer T0
T0, 30 //Every 3 seconds,
M0.0 //Turn on M0.0 (which then
//disables the timer)
Instruction Set
5-7