Siemens SIMATIC S7-300 Quick Start Manual page 53

STL Statements Enter the STL statement below for the TLIGHT sample program in your
for OB1
OB1. Proceed as described in the table on the previous page.
Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
Network 8: Timer start for yellow phase delay for vehicles
A M 0.0
A T 3
L S5T#6S
SI T 4
Network 9: Red phase for pedestrians
A M 0.0
A(
ON T 2
O T 3
)
ON M 0.0
= Q 0.0
Network 10: Timer start for red/yellow phase for vehicles
A M 0.0
A T 4
L S5T#3S
SI T 5
Network 11: Timer start for green request delay
A Q 0.7
L S5T#1S
SI T 6
Network 1: FC1 call for traffic light control
CALL FC1
Programming Logic Blocks with STEP 7
6-9