.. _control-modes:

Control Modes
-------------

The |product| have one control mode called *Auto-Crossover* that is described in detail in :ref:`mode-autocrossover`.  This mode is automatically activated as soon as the |product| is enabled.

.. _mode-autocrossover:

Auto-Crossover Mode
^^^^^^^^^^^^^^^^^^^

In auto-crossover, set-points define levels at which regulation states change.  Whichever feedback error becomes negative, the corresponding regulation is activated.

As an example of auto-crossover, consider  open-circuit condition. The starting regulation state for the |product| is current regulation. The feedback current error will never become negative, causing the output to rise in voltage, and eventually surpassing the voltage set-point and regulation crossover to voltage regulation.

.. _fig-control-mode-autocrossover-1:

.. figure:: /_common-all/_images/control-mode-autocrossover-1.*
	:width: 300pt
	:align: center

	Auto-Crossover example where the power set-point is *below* the product of the voltage and current set-points, allowing a crossover into power regulation from either voltage or current regulation.


.. _fig-control-mode-autocrossover-2:

.. figure:: /_common-all/_images/control-mode-autocrossover-2.*
	:width: 300pt
	:align: center

	Auto-Crossover example where the power set-point is *above* the product of the voltage and current set-points, so the unit alternates only between voltage and current regulation.