Appendix K: Additional PX3 Information
682
In the threshold settings, the Deassertion Hysteresis field determines a
new level to trigger the "deassertion" action.
This function is similar to a thermostat, which instructs the air
conditioner to turn on the cooling system when the temperature exceeds
a pre-determined level. "Deassertion Hysteresis" instructs the PX3 to
de-assert the worse state for a sensor only when that sensor's reading
reaches the pre-determined "deassertion" level.
For upper thresholds, this "deassertion" level is a decrease against each
threshold. For lower thresholds, this level is an increase to each
threshold. The absolute value of the decrease/increase is exactly the
hysteresis value.
For example, if Deassertion Hysteresis = 2, then:
Upper Critical = 33, so its "deassertion" level = 33 - 2 = 31.
Upper Warning = 25, so its "deassertion" level = 25 - 2 = 23.
Lower Critical = 10, so its "deassertion" level = 10 + 2 = 12.
Lower Warning = 18, so its "deassertion" level = 18 + 2 = 20.
To use each threshold as the "deassertion" level instead of determining
a new level, set the Deassertion Hysteresis to 0 (zero).
How "Deassertion Hysteresis" is helpful:
If you have created an event rule that instructs the PX3 to send
notifications for deassertion events, setting the "Deassertion Hysteresis"
is helpful for eliminating a number of notifications that you may receive
in case a sensor's readings fluctuate around a certain threshold.
Deassertion Hysteresis Example for Temperature Sensors
Summary of Contents for PX3-1000 series
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Page 92: ...Chapter 4 Connecting External Equipment Optional 70...
Page 668: ...Appendix J RADIUS Configuration Illustration 646 Note If your PX3 uses PAP then select PAP...
Page 673: ...Appendix J RADIUS Configuration Illustration 651 14 The new attribute is added Click OK...
Page 674: ...Appendix J RADIUS Configuration Illustration 652 15 Click Next to continue...
