Siemens Simatic S7-300 - Page 61

6-17
Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
Network 8: Timer start for yellow phase delay for vehicles
M0.0
&
T3
S5T#6S
T4
??.?
???
???
S_ODT
S
TV
R
BI
BCD
Q
Network 9: Red phase for pedestrians
Q0.0
>=1
M0.0
>=1
&
T2
=
T3
M0.0
Network 10: Timer start for red/yellow phase for vehicles
M0.0
&
T4
S5T#3S
T5
??.?
???
???
S_ODT
S
TV
R
BI
BCD
Q
Network 11: Timer start for green request delay
S5T#1S
T6
Q0.7
??.?
???
???
S_ODT
S
TV
R
BI
BCD
Q
Enter the FBD elements below for the TLIGHT sample program in your
OB1. Proceed as described in the table on the previous page.
Network 1: FC1 call for traffic light control
??.?
FC1
EN ENO
FBD Elements for
OB1
Programming Logic Blocks with STEP 7