7.1 InterlockVariableType Definition

This VariableType is a Boolean indicating if the interlock is active. The instance of a Variable of InterlockVariableType shall have a descriptive name (display name) and include a description. The description shall describe the type of interlock. On a project basis an optional summary that details active interlocks may be implemented to support understanding of the open / close interlock status within the Object. For a given instance of an Object, any number of referenced interlocks may exist, where each instance would represent a specific interlock. The number of interlocks is determined at configuration time of the Object and could be different for each Object in a given well. Each interlock variable shall contain an InterlockFor reference to at least one of the following:

NonDefeatableOpenInterlock,

DefeatableOpenInterlock,

NonDefeatableCloseInterlock,

DefeatableCloseInterlock.

A given instance of an InterlockVariableType might be referenced by more than one Object, but for all objects that reference a given instance of an InterlockVariableType there must be at least one InterlockFor reference.