Top and grouping object that helps to form structures
 in the Node Hierarchy in the Node Configuration.

 A ProviewR system can have several $NodeHier objects
 placed on the top level or below another $NodeHier
 object.

 The object is used at the Node Configuration in a way
 analog to the $PlantHier object in the Plant
 Configuration. The advantage in using the object is not
 always obvious. One way in a ProviewR system with
 several nodes is to collect operator and process
 stations below separate $NodeHier objects.
 Is created in the development environment by means of
 the Configuration Editor.

 Contains no relevant information (=data) in rtdb.
 If, for the current node, no instance by the class
 $NodeHier with the name $Orphange exist, it will be
 created at 'Create Load Files ...'. This is the
 background:

 In the target environment it is possible to create
 objects dynamically. This may be done from application
 programs by call to the system routine
 gdh_CreateObject(...). Created objects have always to
 be put below a parent object, i.e. they cannot exist on
 the root level. If such an parent object is deleted at
 program changing, the dynamically created objects below
 it, would not be accessible any longer. Therefor
 ProviewR will put such objects below $Orphange.

 Optional text to describe the use of the object.

 Configuration status.
 Status in the development environment for an hierarchy,
 plcprogram or process graph, set by the designer to indicate
 the current state. If a status is set for an object, it is
 marked red, yellow or green in the configurator. Also the
 status text if viewed surrounded by angel brackets.

 Safety level.
 Safety level in the development environment for an hierarchy,
 plcprogram or process graph, set by the designer to indicate
 the level. If a level is set for an object, it is marked with
 a warning trangle.