Emerson AXP1600 Manual Do Utilizador

This section describes the various OEM sensors provided by Emerson and Pigeon Point 
Systems that are located on the SAM.

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The ShM implements the alarm generation mechanism as part of the platform event filtering 
(PEF) framework. An OEM action in PEF is implemented as alarm generation. The ShM 
implements the alarm sensor in its own sensor space. The sensor type for this sensor is OEM 
specific, currently chosen to be DFh. The sensor is a discrete sensor with three states:

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State 0 reflects the presence of the Critical alarm

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State 1 reflects the presence of the Major alarm

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State 2 reflects the presence of the Minor alarm

Changes in the states of this sensor may be mapped to events using regular IPMI mechanisms.

Subsequently, platform event filtering may be used to specify actions, such as chassis reset or 
power cycle, that should be invoked for these events, or alerts to be sent to remote destinations 
(including the System Manager).

The alarm sensor is recorded in the device SDR repository maintained by the ShM. The 
command Re-Arm Sensor Events can be used by the ShM to clear active Major and Minor 
alarms.

The ShM tracks the current state of alarms and the alarm cutoff input line and modifies the state 
of alarm LEDs accordingly. When the alarm cutoff signal gets activated, the ShM stops 
generating the alarms to the external output, but maintains the alarm state internally. The alarm 
LED(s) is (are) left blinking during that time. When the alarm cutoff signal gets deactivated, the 
state of external outputs and LEDs is restored according to the current state of the alarms 
(Minor and Major alarms may still be cleared while alarm cutoff is active).