Your link with your construct companion is strong enough that it can remain active after you fall unconscious or are killed.
Prerequisite: Construct companion class feature
Benefit: If you are knocked unconscious, fall asleep, or are killed, your construct companion remains active for a number of rounds equal to your vanguard level before it shuts down. If you are brought back to consciousness before this duration expires, your construct does not shut down. If the duration expires before you are brought back to consciousness, your companion shuts down as normal.
Path of Iron, © 2015, Ascension Games, LLC; Author Christopher Moore