User`s guide
Table Of Contents
- Figure 2.1: VMR Series - Front Panel (Model VMR-16HD20-1 Shown)
- Figure 2.2: VMR Series - Back Panel (Model VMR-16HD20-1 Shown)
- Figure 2.3: NPS Series - Front Panel (Model NPS-16HD20-1 Shown)
- Figure 2.4: NPS Series - Back Panel (Model NPS-16HD20-1 Shown)
- Figure 5.1: Boot Priority Example 1
- Figure 5.2: Boot Priority Example 2
- Figure 9.1: The Help Menu (Administrator Mode; Text Interface - VMR Shown)
- Figure 14.1: Web Access Parameters (Text Interface Only)
- Figure B.1: RS232 SetUp Port Interface
- 1. Introduction
- 2. Unit Description
- 3. Getting Started
- 4. Hardware Installation
- 5. Basic Configuration
- 5.1. Communicating with the VMR or NPS Unit
- 5.2. Configuration Menus
- 5.3. Defining System Parameters
- 5.4. User Accounts
- 5.5. Managing User Accounts
- 5.6. The Plug Group Directory
- 5.7. Defining Plug Parameters
- 5.8. Serial Port Configuration
- 5.9. Network Configuration
- 5.10. Save User Selected Parameters
- 6. Reboot Options
- 7. Alarm Configuration
- 8. The Status Screens
- 9. Operation
- 10. SSH Encryption
- 11. Syslog Messages
- 12. SNMP Traps
- 13. Operation via SNMP
- 14. Setting Up SSL Encryption
- 15. Saving and Restoring Configuration Parameters
- 16. Upgrading VMR/NPS Firmware
- 17. Command Reference Guide
- Appendix A. Specifications
- Appendix B. Interface Descriptions
- Appendix C. Customer Service
- Index

7-6
Alarm Configuration
7.2. The Over Temperature Alarms
The Over Temperature Alarms are designed to inform you when the temperature level
inside your equipment rack reaches or exceeds certain user-defined levels. There
are two separate Over Temperature Alarms; the Initial Threshold alarm and the Critical
Threshold Alarm.
Typically, the Initial Threshold alarm is used to notify you when the temperature within
your equipment rack reaches a point where you might want to investigate it, whereas the
Critical Threshold alarm is used to notify you when the temperature approaches a level
that may harm equipment or inhibit performance. The trigger for the Initial Threshold
alarm is generally set lower than the Critical Threshold alarm.
If the user-defined trigger levels for temperature are exceeded, the VMR/NPS can
automatically shut off power to non-essential devices ("Load Shedding") in order to
reduce the amount of temperature that is being generated within the rack. In addition,
the Load Shedding feature can also be used to switch On additional components, such
as fans or cooling systems in order to dissipate the excess heat. After Load Shedding
has taken place, the Load Shedding Recovery feature can be used to return plugs to
their previous state after the temperature drops to an acceptable level.
Notes:
• In order for the VMR/NPS to provide alarm notification via Email,
communication parameters must first be defined as described in
Section 5.9.11.
• In order for the VMR/NPS to provide alarm notification via Syslog Message,
Syslog parameters must first be defined and Syslog Messages must be
enabled as described in Section 5.9.2 and Section 11.
• In order for the VMR/NPS to provide alarm notification via SNMP Trap, SNMP
parameters must first be defined, and SNMP Traps must be enabled as
described in Section 5.9.7 and Section 12.
To configure the Over Temperature Alarms, access the VMR/NPS command mode
using a password that permits Administrator Level commands, and then use the Alarm
Configuration menu to select the desired alarm feature.
Note that both the Initial Threshold menus and Critical Threshold menus offer essentially
the same parameters, but the parameters defined for each alarm are separate and
unique. Therefore, parameters defined for the Critical Threshold Alarm will not be
applied to the Initial Threshold Alarm and vice versa.
Both the Over Temperature (Initial Threshold) alarm and the Over Temperature (Critical
Threshold) alarm offer the following parameters:
• TriggerEnable: Enables/Disables the trigger for this alarm. When Disabled, this
alarm will be suppressed. (Default = On.)
Note: To cancel an alarm without correcting the condition that caused the
alarm, simply toggle the Trigger Enable parameter Off and then back On again.
• AlarmSetThreshold: The trigger level for this alarm. When temperature exceeds
the Alarm Set Threshold, the VMR/NPS can send an alarm (if enabled) and/or begin
Load Shedding (if enabled.) For more information on Load Shedding for the Over
Temperature Alarm, please refer to Section 7.2.1. (Initial Threshold: Default = 90°F
or 32°C, Critical Threshold: Default = 100°F or 38°C.)