Mode zero allows you to select various points and corners of the box, allowing you to reshape the box. Mode 2 selects only the center point inside the box and allows you to move the entire box. Mode 1 is very similar to mode 2, but mode 1 doesn't show the bounding box. Release 2011 introduced improvements to the location boxes, allowing us to move components in and out of the boundaries and have the INST/LOC values of the moved components updated accordingly. It also introduced the option to hide the INST/LOC attributes of components that are surrounded by the box. But there is no functionality that automatically updates components within the box after the box has been moved or reshaped/stretched.
I have seen an issue with the box description not updating after you edit the box description. Before release 2011 there was an issue with the box losing it's intelligence altogether and it couldn't be edited again. This was improved somewhat but sometimes edits to the location box description still do not update the actual text that is displayed next to the box.
The location box code started as nothing more than Electrical making a call to AutoCAD for the rectangle command, then looping back to Electrical to perform an update of the INST/LOC value of components found within the boundary of the box. It would also place dumb text as a box description if we entered a description. There was no option to automatically fill in the box description with the IEC style description (Use =Installation+Location Values).
The location box appears to still be evolving as a feature but isn't quite perfect in my opinion. But it is only an inconvenience, nothing that prevents me from doing my job. For example, the prompts are actually not in the proper order of typical IEC hierarchy. The edit dialog contains the Location field above the Installation field, giving the appearance that Location supersedes Installation. Actually Installation supersedes Location. Installation might be a factory name (i.e. ATL for Atlanta) or production line number (i.e. L1 for LINE 1) and Location might be a particular panel within the facility or production line (i.e. MP for Main Panel, JB1 for Junction Box 1). The fact that the fields are reversed causes no functional problem though.
The occasion where the box description doesn't actually update after an edit is an inconvenience that I just have to watch our for, but I can manually edit the box description to correct this. The box description is still only a text entity. Electrical calls AutoCAD and asks for the text command and then fills in the text value from the entry we make in the Box Description field. Later releases introduced new code that would change the text value of the box description after editing the location box, but it has never been 100% reliable. Being aware of this inconsistency I always double check and edit manually when necessary. This is not a new issue for 2012. It has actually become slightly more reliable but is still not perfect.
Doug McAlexander
Design Engineer/Consultant/Instructor/Mentor
Specializing in AutoCAD Electrical Implementation Support
Phone: (770) 841-8009
www.linkedin.com/in/doug-mcalexander-1a77623
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