In this paper, authors compare the mayor procedures to accomplish a circuit for linear process automation, then, they standardize a rung in order to be implemented in a PLC or wired logical. At the end of this paper, authors present a new equation to implement a linear automation process, the equation is derived from a standardized procedure that it has been used for more than 10 years at the control and machines laboratory at the University Pontificia Bolivariana. I'he equation has been tested under more than 600 examples and here authors present the core's algorithm.