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System Management: Sensors and Sensor Data Records
10007175-02 KAT4000 User’s Manual
9-43
Note: Each byte has eight bits.
Table 9-40: Event Message Format
Event-generating sensors with a Threshold Event/Reading Type (0x01) initiate an event
message when a sensor reading crosses the defined threshold. The default thresholds for a
particular sensor are retrieved by sending the IPMC a Get Sensor Thresholds command. The
system management controller must send the IPMC a Get Sensor Reading command to
retrieve the current sensor reading. Please refer to the IPMI specification listed in
Tab l e 1- 3
for complete details on using these commands.
Byte: Field: Description:
0 RsSA Responder’s Slave Address (Address of Event Receiver)
1 NetFn/RsLUN Net Function Code (0x04) in upper 6 bits; Responder’s LUN in
lower 2 bits
2Chk1 Checksum #1
3 RqSA Requester’s Slave Address (Address of our board on IPMB)
4 RqSeq/RqLUN Request Sequence number in upper 6 bits; Requester’s LUN in
low 2 bits
5 Cmd Command (Always 0x02 for event message)
6 EvMRev Event Message Revision (0x04 for IPMI 1.5)
7 Sensor Type Indicates event class or type of sensor that generated the
message
8 Sensor Number A unique number indicating the sensor that generated the
message
9Event Dir/Event
Typ e
Upper bit indicates direction (0 = Assert, 1 = Deassert); Lower 7
bits indicate type of threshold crossing or state transition
10 Event Data 0 Data for sensor and event type
11 Event Data 1 (Optional) Data for sensor and event type
12 Event Data 2 (Optional) Data for sensor and event type
13 Chk2 Checksum #2