Base component for a valve with digital increment/decrement orders, position feedback
 and two switches (switch open and switch closed).

 The buttons buttons for manual increment and decrement in the object graph can
 be configured to show the texts Incr/Decr, Up/Down, Forw/Back or Open/Close.

 All the signals and code for this object is found in the actuator object
 BaseActuatorIncrDecr.

 The graphical symbol for this object is BaseComponent/ValveIncrDecr.

 Default dynamics:
 - the valve symbol is filled with the original color when the valve is
   not closed.
 - colored white when the valve is closed.
 - colored flashing red when an error occurs.
 - colored yellow when a warning occurs.
 - indicating the current mode:
   M:  Manual mode.
   L: Local mode, mode is set to auto when local is left.
   LM: Local mode, mode is set to manual when local is left.
   No indication: auto mode.

 Default action:
 - the methods menu is opened with MB3.

 Mode and supervision is handled by the actuator object. See class
 BaseActuatorIncrDecr for more information.

Configuration

 There are eight configuration alternatives, that specifies whether the actuator
 has limit switches and/or positional feedback.

 - TwoSwitches            Switch open and switch closed. No positional feedback.
 - SwitchOpen             Switch open and no positional feedback.
 - SwitchClosed           Switch closed and no positional feedback.
 - NoSwitches             No switches and no positional feedback.
 - PositionTwoSwitches    Positional feedback, switch open and switch closed.
 - PositionSwitchOpen     Positional feedback and switch open.
 - PositionSwitchClosed   Positional feedback and switch closed.
 - PositionNoSwitches     Positional feedback and no switches.

 Signals that should be connected to channel objects:

 - Actuator.OrderIncr    Do
 - Actuator.OrderDecr    Do
 - Actuator.Position     Ai (optional)
 - Actuator.SwitchOpen   Di (optional)
 - Actuator.SwitchClosed Di (optional)

 For plc coding the function object BaseValveIncrDecrFo is used.

 Create a function object in the plc editor and connect it to the current
 object with the connect function.

 For simulation of the sensor value, use the plc object BaseCValveSim.

• BaseValveIncrDecrFo
• BaseActuatorIncrDecr
• CompModeD2
• BaseValveIncrDecrSim

 Super class.

 Enumeration for object graph configuration.
 Handled by the ConfigureComponent method.

 The actuator object that contains all the signals, code, and alarms
 for this object.

 Represents the mechanical valve.

 The plc function object connected to this object.
 This attribute is set when the function object is connected from
 the plc editor by the connect function.

 The simulate plc function object connected to this object.
 This attribute is set when the simulate function object is connected from
 the plc editor by the connect function.