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Functional Changes to the Remote Power On/Off
Due to the modified firmware in the Power On/Off +Aux ShutDown/REBOOT unit, there are some minor functional
variations from those described earlier in this guide. All changes are related to the addition of the shutdown function.
Minimum ON Time:
The Minimum ON Time, described on page 15, has been increased from 1 to 5 minutes. This increase gives additional
time for the system to load Windows NT/2000/XP and start the UPS Service prior to a shutdown signal occurring.
ShutDown Delay Time:
In addition to the selected Power-OFF Delay Time described earlier, the amount of time until a power-off or a reboot
occurs has been increased by three and one-half (3.5) minutes. This additional time is known as the ShutDown Delay
Time and is the additional time allotted for the ShutDown to occur. After the selected Power-OFF Delay Time has
expired, the ShutDown signal is asserted, the ShutDown Delay counts down for the 3.5 minutes, then the power switches
OFF. As defined further in this appendix, Microsoft's UPS Service has a minimum 'grace' period of two-minutes. This
means the UPS Service itself will not begin the actual shut down until the PPNT unit's ShutDown signal has been
actively asserted for two minutes, which leaves a total of 90 seconds for the actual operating system shut down to take
place.
On/Off Master Power Switch and On/Off LED:
When operating Remote Power On/Off in the Power-ON or Infinite-On/Off mode, the square Master ON/OFF push
button and the corresponding LED operate differently than described earlier. The operation of the pushbutton is not
altered if the
REBOOT Mode has been selected. For the Power-ON and Infinite-On/Off modes with a PPNT unit, the
push button will cycle through three states, each indicated by the LED as follows:
Appendix C | Window
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Power=Off
LED=Off
Power=On
LED=On
Power=On
LED=Blinking
Shutdown Started
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Remote Power On/Off s NT/2000/XP ShutDown • 49