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6.0 Data Management, continued
51
704-939-B10-001 Rev. A5 (06/2019)
6.2 SCTE-HMS MIB Alarms
6.2.1 SCTE-HMS Configurable Alarms
The HMS discrete and analog alarms provide the capability to monitor and alarm various power supply and environmental
conditions and measurements. The alarms in the SCTE-HMS propertyTable and the discretePropertyTable can be defined
and set to provide a custom monitoring system.
The following section provides an example and detailed information on how to set values and enable or disable alarms in
the MIB tables. For ease of reference they are in this sequence:
• An example of how to set a temperature alarm
• A table to help convert the desired reported alarm states to hexadecimal for setting the MIB
• Commonly monitored parameters and recommended values
Example:
The alarms for psTemperature on the following page are set so that the normal temperature range is from 30°C to 45°C.
If the temperature rises above 45°C, a casHI alarm will be sent to the alarmTable. Anything over 50°C is considered a
critical condition and will generate a casHIHI alarm. If the temperature falls below the normal level of 30°C, casLO will be
generated and if it continues to drop below 0, a casLOLO will be generated. The temperature must rise above the LOLO
limit plus the deadband value of 3°C before the casLOLO alarm will change to a casLO. The alarmEnable field is set to 0F
Hex to monitor and alarm for all conditions.