This reports whether the plant's automated battery internal-resistance test most recently aborted, and if so which of three distinct abort conditions caused it, per the description's four-value enumeration. Having three distinct abort codes rather than one generic failure lets an admin distinguish, for example, a test that aborted for one specific reason from one that aborted for another, without digging into raw test logs, though the MIB's shipped text does not spell out what specifically differentiates abort1, abort2, and abort3. A value of 2 (abort2) at least tells the admin the most recent test failed for a distinguishable, repeatable reason rather than completing with none(4).