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UPS Network Management Card 2 User’s Guide42
(e.g., a UPS is already off when the Reboot UPS action starts), that UPS logs an event, but performs the
rest of the action, if any.
• All participating UPS models synchronize their performance of the action (within a one-second time
period under ideal conditions for Smart-UPS, but sometimes longer.
• In reboot and sleep actions:
– Immediately before the initiating UPS begins waiting the time specified as Return Delay, by
default it waits up to 120 seconds (its configurable Power Synchronized Delay) for any UPS that
does not have input power to regain that power. Any UPS that fails to regain input power during
that delay does not participate in the synchronized restart, but waits until its own input power
returns before restarting.
– The LEDs on the front of the UPS do not sequence their lights as they do for a normal (not
synchronized) reboot or sleep action.
• UPS status and events are reported in the same way for synchronized actions as for actions on
individual UPS models.
Guidelines for Synchronized Control Groups. Before you configure this UPS as a Synchronized Control
Group (SCG) member, review these guidelines:
• All UPS models in an SCG must be the same model.
• SCGs are supported for any Smart-UPS with a card slot that accepts a Network Management Card.
• When its membership in an SCG is enabled, the
NMC blocks UPS communications from a connected
management model on the serial communications port. However, the
NMC still allows access to the
command line interface on the serial communications port.
• See also the Knowledge Base article 11135, on the support page of the www.apc.com website.
Display status of a Synchronized Control Group member. When SCG is enabled, the following
additional information is displayed about the SCG membership of this group mem
ber: its IP address, its Input
Status good (acceptable) or bad (not acceptable); and its Output Status (On or Off).
See the online help for information configuring the fields used in synchronizing an SCG.
The parallel units option (Smart-UPS VT UPS devices)
This option only displays with Smart-UPS VT devices when you have set up a parallel configuration. It lists all
parallel units (UPS devices that share a load, continuing to provide power to the load if a parallel unit fails).
The UPS to which you are logged on is listed first. Use Add Unit to add a parallel UPS, and specify its name
and IP address.
Diagnostics page
Path: UPS > Diagnostics
This page is not available for all UPS devices.
You can run a self-test or a runtime calibration for any UPS. The Self-Test and Calibration fields display the
results of the most recent test and calibration.
Select a radio button, and click Apply to perform either of these actions, or to test an alarm. However, the UPS
audible alarm test is model-specific and might not be available for your UPS.