This model represents a second order Quantized State System integrator.
As inputs, it has to receive two messages: one with type == 1 and as value the value of the signal to integrate and; one with type == 2 and value equal to the first derivative of the signal.
It generates two output messages: one with type == 1 and the value of the integrated signal and; one with type == 2 and the value of the first derivative of the integrated signal.
The quantum parameter represents the threshold to detect changes in the input signal.
The startX parameter represents a guess for the initial value of the input signal.
model QSS2 = SRC.QSS.IntegratorQSS2.integratorQSS2;