Emerson 752I Manuel D’Utilisation

 IPMI Message Protocol

752i User’s Manual

The Set Heartbeat command configures the Zircon PM to send a heartbeat message to a 
receiver on the IPMB or private I

2

C bus at a specific interval. The interval can range between 

100 milliseconds and 25.6 seconds. The heartbeat message data may be a string of bytes or 
a command that gets processed at each interval. 

 shows the request/response 

data parameters for the Set Heartbeat command.

Table 11-13:

Request 
Data

1

Bus  ID
Bits[7:4, Reserved
Bits[3:1], Bus ID, zero-based
000=Public IPMB
001=Private IIC Bus #1, Private IPMB
111=Private IIC Bus #2
Bit[0], Bus Type
0=Public (IPMB)
1=Private Bus

2

Bits[7:1], Slave Address of Recipient
Bit[0], Reserved. Write as zero.

3

Send  Interval 
The interval in 100-millisecond counts between heartbeat 
transmissions. Writing zero disables the heartbeat.

4

Command/Data
0=Following is a command to be processed. Its reply data is to be 
sent for the heartbeat data.
1=Following is constant data to be sent for the heartbeat data.

5:N

Command or Constant Data
If the data is a command to be processed, this field must contain a 
properly formatted IPMB message, minus the first byte 
containing the slave address.

Response 
Data

1

Completion  Code