- normally - opened contact.


This element has two entrances. First - controlled, second - login normally - open contact. If the input value IN0 is served other than INFINITY, then contact closes and the output element OUT value IN1. If managers input value INFINITY (uncertainty), then at the exit of INFINITY. Example of using this element can be explained in the following example. By changing the values on an element of the condition can be obtained with two options:
First - the condition is not fulfilled, then the element does not upravlyaeschego signal at the output OUT = INFINITY, and the contact is normally - open. 2 lights is no lights (fig. 1);

second - in the fulfillment of the conditions for controlled IN0 input signal and closes the contact element, the output value of IN1. 2 lights is glow (fig.2).



Fig. 1



Fig. 2