Automating Manufacturing Systems - Process Control and ...

plc advanced functions - 16.24
16.6 DESIGN CASES
16.6.1 If-Then
Problem: Convert the following C/Java program to ladder logic.
void main(){
int A;
for(A = 1; A < 10 ; A++){
if (A >= 5) then A = add(A);
}
}
int add(int x){
x = x + 1;
return x;
}
Solution:
MainProgram
S:FS
FOR
function name: increment
index A
initial value 1
terminal value 10
step size 2
SBR
Increment
GEQ
A
5
ADD
A
1
Dest A
RET
Figure 16.24
C Program Implementation
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