Western Telematic MPC-8H-1 manual Over Temperature Alarms - Load Shedding and Auto Recovery

Alarm Configuration

•Address 1, 2, and 3: These parameters are used to select which of the three email addresses, defined via the "Email Messages" menu (see Section 5.9.11,) will receive the email alarm notification messages generated by this alarm. The Address parameters can be used to select one, or any combination of the addresses defined via the Email Messages menu. (Default = All On.)

Note: If Email addresses have been previously defined, then the text under the parameters will list the current, user defined email addresses.

•Subject: This parameter is used to define the text that will appear in the "Subject" field for all email notification messages generated by this alarm. (Default = "Alarm: Over Temperature (Initial)" or "Alarm: Over Temperature (Critical)".)

•Load Shedding: Provides access to a submenu, which is used to configure and enable the Load Shedding feature for the Over Temperature alarms. When Load Shedding is enabled and properly configured, the MPC will switch specific, user-selected plugs On or Off whenever the temperature exceeds the Alarm Set Threshold value. If the Auto Recovery feature is enabled, the MPC can also return these user-selected plugs to their prior status, when the temperature falls below the Alarm Clear Threshold value. For more information on the Load Shedding Feature and Auto Recovery, please refer to Section 7.2.1.

7.2.1.Over Temperature Alarms - Load Shedding and Auto Recovery

In the case of the Over Temperature Alarms, the Load Shedding feature is used to switch specific, user-defined plugs On or Off whenever the temperature exceeds the Alarm Set Threshold value. This allows the MPC to automatically shut Off non-essential devices in order to reduce the temperature being generated within the rack, or automatically switch On devices such as fans or cooling systems in order to dissipate heat from the rack.

When the Auto Recovery feature is enabled, the MPC can also automatically "undo" the effects of the Load Shedding feature when the temperature again falls to a user-defined non-critical level.

For both the Initial Threshold and Critical Threshold Over Temperature Alarms, Load Shedding and Auto Recovery are enabled and configured via submenus of the Over Temperature Alarm configuration screens. To access the Load Shedding and Auto Recovery configuration menus, access the MPC command mode using an account that permits access to Administrator level commands, and then proceed as follows:

•Text Interface: Access the Over Temperature Alarm configuration menu as described in Section 7.2, and then type 5 and press [Enter] to display the Load Shedding configuration menu.

•Web Browser Interface: Access the Over Temperature Alarm configuration menu as described in Section 7.2, and then click on the "Load Shedding" link to display the Load Shedding configuration menu.

Note that the Load Shedding configuration menus for both the Initial Threshold Alarm and Critical Threshold Alarm offer essentially the same set of parameters, but the parameters defined for each alarm are separate and unique. Therefore, parameters defined for the Critical Threshold Load Shedding will not be applied to the Initial Threshold Alarm and vice versa.

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