Siemens SIMATIC S7-200 System Manual page 184

S7-200 Programmable Controller System Manual
Example: For- - Next Loop Instructions
170
Network 1 //When I2.0 comes on, the outside loop
//(arrow 1) is executed 100 times
1
LD I2.0
FOR VW100, +1, +100
Network 2 //The inside loop (arrow 2)
//is executed twice for each
//execution of the outside loop
//when I2.1 is on.
2
LD I2.1
FOR VW225, +1, +2
Network 3 //End of Loop 2.
NEXT
Network 4 //End of Loop 1 .
NEXT