Lantronix EMG 8500 EMG User Guide - Page 247

11: Remote Power Managers continue to run until its battery fails completely, to shutdown just the UPS with the low battery, or to shutdown one or more UPSes. UPS-type RPMs can report the following states:  OL - On line power  OB - On battery power  LB - Low battery  HB - High battery  RB - The battery needs to be replaced  CHRG - The battery is charging  DISCHRG - The battery is discharging (inverter is providing load power)  BYPASS - UPS bypass circuit is active - no battery protection available  CAL - UPS is currently performing runtime calibration (on battery)  OFF - UPS is offline and is not supplying power to the load  OVER - UPS is overloaded  TRIM - UPS is trimming incoming voltage  BOOST - UPS is boosting incoming voltage  FSD - UPS is in forced shutdown due to a critical condition Once a UPS is on line power (status is OL) and goes off of line power and onto battery power (status is OB), it may reach a low battery state (status is OB, LB or LB). Switching from line power to battery power, and reaching a low battery state are critical states that can result in syslog, email and SNMP trap notifications. The exact point at which a UPS reaches a low battery state is device dependent and is related to the battery.charge, battery.charge.low, battery.runtime and battery.runtime.low settings which can be viewed in the "Raw Data" report. Once a UPS reaches a low battery state, the Shutdown Order, Low Battery Action and Provides EMG Power settings determine which UPSes to shutdown, and in what order. The UPS with the low battery will be placed into FSD (Forced Shutdown) mode. The following actions will be performed based on the Low Battery Action setting for the UPS with the failed battery:  Allow Battery Failure - The UPS battery will be allowed to run until it fails completely. If the UPS provides power to the EMG and the battery fails, the EMG will not be cleanly shutdown. In this scenario, the Shutdown Order setting will be ignored. The Shutdown Order setting may be used if another UPS reaches the low battery state (see Shutdown all UPSes below).  Shutdown This UPS - If the UPS provides power to the EMG, the EMG will begin shutdown procedures, shutting down the UPS last. If the UPS does not provide power to the EMG, the UPS will be shutdown, but will continued to be monitored in case it comes back online.  Shutdown all UPSes - The EMG will begin shutting down all UPSes with a non-zero Shutdown Order, shutting down UPSes with a shutdown order of "1" first, UPSes with a shutdown order of "2" second, etc. Any UPS which provides power to the EMG is always forced to have its Shutdown Order set to 50, which the highest (and last) Shutdown Order. If the UPS with the failed battery provides power to the EMG (and thus has a Shutdown Order set to 50), the EMG will also begin shutdown procedures, shutting down the failed UPS last. If none of the UPSes provide power to the EMG, after they are all shutdown their drivers will remaining running in case the UPS comes back online. In this case, any queries to an RPM while it is still offline may report "RPM driver data is stale". If the Low Battery Action for a UPS is set to Allow Battery Failure, but the UPS has a non-zero Shutdown Order, the UPS EMG™ Edge Management Gateway User Guide 247