Filter
Top Products
3
AXP1406/AXP1600 Subsystem IPMI Programmer’s Reference (6806800B66C)
137
OEM Sensors
3.1 OEM Sensors
This section describes the various OEM sensors provided by Emerson and Pigeon Point
Systems that are located on the SAM.
z Telco Alarms (Pigeon Point OEM)
z AXP Backplane ID (Emerson OEM)
z POST Results (Emerson OEM)
z Shelf FRU Info (Emerson OEM)
z FT -48 V Fuse (Emerson OEM)
z Shm Fault Event (Emerson OEM)
3.1.1 Telco Alarms (Pigeon Point OEM)
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:
z State 0 reflects the presence of the Critical alarm
z State 1 reflects the presence of the Major alarm
z 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).