This object reflects the Internal Error Code.
The format is a string of dotted decimal numbers
composed of the following components:
Version.Entity.Category.Subsystem.Errorcode.Diagnostic
Each component is defined as follows:
Version : The version of IEC software.
Entity : The network entity that originated
the error.
Category : The category of the error (eg, software
error, hardware resource unavailable, ...)
Subsystem : The subsystem in which the error occurred.
Errorcode : A subsytem-specific error code.
Diagnostic : An implementation-specific diagnostic code.