Pulse Output. A modified Do object to make specified
 pulses on a Do-channel.

 Po objects are associated to ChanDo in the same way as
 Do objects. Note that it is ActualValue
 before any eventual inversion that are used to initiate
 pulses.
 The object generates, when ActualValue makes a certain
 transition, a pulse with the duration of PulseLength.
 PosFlank specifies which ActualValue transition that
 will initiate a pulse. If a positive or negative pulse
 is generated depend on PosPulse.

 ActualValue is handled e.g. from application programs
 by the system call: gdh_SetObjectInfo(...)
 If ResetActualValue = TRUE, ProviewR will restore
 ActualValue after trigger detection. The restoration is
 done independent of the current state of the output;
 i.e. independent of any eventual propagating pulse or
 not. Repeated triggering during propagating pulse do
 not affect the existing pulse.

 The output signal is equal to FixedOutValue when
 EmergBreakTrue is TRUE and EmergBreakSelect = 2 and
 equal to TestValue when TestOn is TRUE, i.e. no
 filtering in this cases.

 Put the object below a $PlantHier object in the
 development environment in such a way that it belongs
 to the same target node as its associated channel

 Optional text, for example the name of the signal or
 what it represents.

 Name of the associated channel object.

 Index in the DOValue array at the DoArea objects
 that are used for base frequency and partial frequency
 samples. Initiated at boot time by rt_ini.

 Pointer to ActualValue after conversion, if any.

 Xtt method configuration.
 Specification of the available methods for the object.
 If Flags.IsConfigured is set, the methods can be specified in
 the development environment. Otherwise they will be calculated
 in runtime.

 A XttGraph object that will open a graph that contains data for
 this object. This graph can be opened from the popup menu for
 this object.

 A DsTrend or PlotGroup object that contains a trend for this object.
 The trend can be opened from the popup menu for this object.

 A help topic in the xtt help file that contains help for this hierarchy.
 The help can be displayed from the popup menu for this object.

 A URL to the data sheet for the equipment in this hierarchy.
 The data sheet can be displayed from the popup menu for this object.

 A URL to the circuit diagram for the equipment in this hierarchy.
 The circuit diagram can be displayed from the popup menu for this object.

 A photograph of the plant.
 A URL to a photo of the equipment.
 The photo can be displayed from the popup menu for this object.

 A note of the current status of the object.
 Notes are used to exchange information between operators. It is handled
 by the Note method.

 Specifies the pulse duration in seconds.

 Specifies if the trigger condition is a leading or
 trailing edge. Trigging is only possible when the
 object is "at rest position", i.e. no pulse generating.

 - TRUE means that the object is trigged when
 ActualValue does the transition FALSE -> TRUE.
 - FALSE means that the object is trigged when
 ActualValue does the opposite transition TRUE ->
 FALSE.

 Specifies if a positive or negative pulse is to be
 generated when the object is  trigged.
 - TRUE means that a positive pulse is generated when
 the object is  trigged. In "the rest position" is
 the output FALSE.

 - FALSE means that a negative pulse is generated when
 the object is trigged.  In "the rest position" is
 the output TRUE.

 Specifies if ProviewR will restore ActualValue after
 trigger detection or not.
 - TRUE means that ActualValue is set:
 a.
    FALSE after triggering, if PosFlank = TRUE
 b. TRUE after triggering, if PosFlank = FALSE

 The restoration of ActualValue is done direct after
 trigger detection and independent of the current
 state of the output; i.e. independent of any
 eventual progagating pulse or not. Repeated
 triggering during propagating pulse do not affect
 the existing pulse.
 - FALSE means that ProviewR do not restore ActualValue.