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

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

 BaseActuatorIncrDecr is for example used in BaseValveIncrDecr.

 The mode, Auto, Manual or Local, is handled by the mode object. See class
 CompModeD2 for more information.

 If the actuator has limit switches, also the switches are supervised. If a
 positional feedback signal is present, the switches are matched against this
 signal. If the position is below 'PosSwitchClosed' and the SwitchClosed signal is
 missing, an alarm is sent. If the position is over 'PosSwitchOpen' and the
 SwitchOpen signal is missing, an alarm is sent.
 If both switches are simultaneously activated, an alarm is also sent.

 Supervision of limit switch timeout is handled by the CompModeD2 object, where
 the timeout time is set in the attribute OrderTimeLimit. A timeout error in
 auto mode causes a switch to manual mode. See CompModeD2 for info how to disable
 this function.

 If you choose not to use the handling of modes in the object, but place this
 outside the object, it is important to reset the order at error status, i.e.
 you should reset the function object inputs at error, to avoid unwanted restarts.
 Use for example ErrorIncr and ErrorDecr in the CompModeD2 object that detects
 timeout errors when limit switches are configured.

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:

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

 For plc coding the function object BaseActuatorIncrDecrFo is used.

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

• BaseActuatorIncrDecrFo
• CompModeD2

 Super class.

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

 The increment order output.

 The decrement order output.

 Analog input signal for the position feedback.

 Digital input switch open.

 Digital input switch closed.

 Mode object.

 Delay for switch alarm in seconds.

 Alarm text for switch alarm.

 Position for limitswitch open.
 If the position feedback (or ordered position, if feedback is
 not present) exceeds this value, and the switch open signal is
 missing, an switch alarm is sent.

 Position for limitswitch closed.
 If the position feedback (or ordered position, if feedback is
 not present) is below this value, and the switch closed signal is
 missing, an switch alarm is sent.

 Indication for error.

 Indication for warning.

 A switch error is detected.

 Enumeration for valve position (open, closed or in between).

 Supervision is disabled.
 Shows the input DisableSup in the plc Fo object.

 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.