The integrator block allows to integrate an input signal. Before using it set its initial state with

  setInitCondition(T val);

Without setting the initial state to a meaningful value, the output will be nan even after enabling the block.

An integrator can be enabled or disabled.

  enable();
  disable();

This, for instance, helps to stop integrating up a given input while handling an exception. Please note that an integrator is in the disabled state upon creation.

An integrator block can be limited, such that its integral does not run over a certain limit. This limit can be set by calling

  setLimit(T upper, T lower);

The default values for the limits are the positive and negative maximum values of the given type.