System Operation
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
101
Standby Mode
Two SC300s may be connected in the same power system to the same RXP bus.
One of the SC300s will operate as normal (Active SC300) and the other will act as a backup unit
(Standby SC300).
If the Active SC300 fails or is removed, then the Standby SC300 will become Active after two to
three minutes, and then control the power system in the usual way.
The Standby Mode alarm indicates that an SC300 is or has been in Standby mode.
When a standby unit is present, the Active SC300 will show an Unknown Hardware alarm.
Configuration
Ensure that both Active and Standby SC300s have identical configuration settings,
except for Standby Mode at Startup, IP address and Identity settings.
It is recommended that Site Name be used to distinguish between the normally Active
and Standby SC300s. For instance, “Site A Active” and “Site A Standby”.
► To Test Standby Mode operation
• Start the system as normal.
• Remove power on the Active SC300, or reset it using the web or front panel.
• After 1 minute or less, the Standby SC300 should become Active.
► To reset the Standby Mode alarm
Go to Alarms and press Reset Standby Mode alarm.
On the front panel, select the alarm and press Clear.
Configuration
► To configure two SC300s to work in Standby mode
• Configure both SC300s with the same settings, except for identity and address settings.
• Connect both SC300s to the system RXP bus.
Normally this is done by connecting both back to the VFN board using and RJ-45 patch cable.
• Choose which SC300 is to be the Standby unit.
• Set Standby Mode at Startup for this unit to Yes.
This only affects operation when both SC300s start at the same time; the SC300 configured to
Start in Standby Mode will delay start-up and allow the other SC300 to start in Active mode.
Parameter Description Where to find:
Standby Mode at
Startup
This setting tells the SC300 to startup in Standby
mode if it is starting at the same time as the other
SC300. It will not affect operation otherwise.
SC300: Setup
Web: System > Interfaces>
Standby Mode
Reset Standby
Mode Alarm
Resets this alarm. SC300: Alarms > Standby
Alarm
DCTools/Web: Alarms
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