Controlin which the signal states of the input signals are allocated defined signal states of the within the meaning of Boolean connections (Figure V 12).
Previously common names, such as parallel control, pilot control, interlocking controls are to be avoided as they can cause confusion (DIN 19 237).
Figure V 12: Logic control system Entirety of input variables, e i Input variable influences that output variable a i; K i Combinational network to form output variables a i; A i Output variable; a Entirety of output variables