Chapter 5: Using the Web Interface
86
Setting the Global Power Cycling Delay
When an outlet is power cycled, it is turned off and then back on. The
number you enter on the PDU Setup page determines the length of time
(in seconds) it takes for ALL outlets on the Dominion PX device to turn
back on after being shut down during the power cycle.
To set the power cycling and sequence delay for all outlets:
1. Choose Device Settings > PDU Setup. The PDU Setup page opens.
2. Type a number in the field labeled PDU Power Cycling Delay. When
power to the Dominion PX device is cycled (either manually or
because of a temporary power loss), this number determines how
many seconds the Dominion PX waits before it provides power to the
outlets. This is useful in cases where power may not initially be stable
after being restored, or when UPS batteries may be charging. The
PDU Power Cycling Delay can be set from 0 to 3600 seconds (one
hour).
3. Type a number in the field labeled Power off period during outlet
power cycling. When the outlets on the Dominion PX device are power
cycled, they are turned off and then back on. The number you enter
here determines the length of time (in seconds) it takes for the outlets
to turn back on after they are shut down during the power cycle. The
default is 10 seconds. The Power Off Period can be set from 0 to 3600
seconds (one hour).
Tip: You can override this power cycling number for specific outlets.
See
Naming and Configuring Outlets
(on page 88). You can power
cycle an outlet from the Outlet Details page. See
Power Cycling an
Outlet
(on page 90).
4. Type a number of milliseconds (ms) in the field labeled Sequence
Delay. The outlet sequence delay determines the time interval the
Dominion PX device takes from outlet to outlet when powering ON or
cycling all outlets. The default is 200 ms, which is sufficient to handle
in-rush current conditions for most servers. Outlet sequence delay
ranges from 1 to 255000 ms.
For SAN (storage area network), disk arrays, and some other
equipment, the delay may need to be extended.
5. When you are finished, click Apply.
When there are a large number of outlets, set both the Power off period
and the Sequence Delays to lower numbers. This way you can avoid a
long wait before all the outlets are available again. This is especially useful
when dealing with outlets grouped from other Dominion PX devices.
Users require the Unit & Outlet Configuration permission to see the
contents of the PDU Setup page.
