Siemens SIMATIC S7-200 Manual page 39

3. Program Modification: On-Delay Timer
+
S0 K2
S2
K2
K0
-
Circuit without PLC
Wiring work on the PLC because of
the additional timer function: NONE.
All necessary switches and actuators are
already wired. The timer relay is replaced
by a PLC function.
The following page introduces the
on-delay timer function of the
S7-200, which we will then include to
obtain the opposite program.
Hardware Software
S1
S3
K0
K1
Basic
Settings
Objective:
In the following program modification, a
time is to be inserted in exercise
program 1 as an on-delay.
When input E0.3 (S3) is activated on
the simulator, a waiting time is started.
Output 0.0, and thus the motor, is not
activated until the waiting time has
expired.
K1
M
Ladder diagram of the circuit
1st Exercise More
Program Exercises
Appendix 35