Programming in LD
1. Example in ST
Let’s considering the logical equation:
%M0 = %I0.%I1+%I2. /%I3

2. Example of Grafcet in ST
Let’s considering the elementary Grafcet

a. Programming Transition/Transition
Initialization

Test on Receptivity and Transition Crossing

Output declaration

b. Programming Transition/Transition with Crossing bits
Initialization

Test on Receptivity

Transition Crossing

Output declaration

c. Programming Step/Step

d. Programming Step/Step with Crossing Bits
Step Equations with Crossing Bits

Step Activation

Output Declaration
