PT CPC5565, Руководство пользователя, Страница: 74 / 118

Chapter 4: System Monitoring and Alarms
74
Payload Communication Timeout
Some of the SIPL commands are subject to payload communication timeouts. If the payload
does not respond with a correct reply within a definite period of time, the IPMC assumes that a
payload communication timeout occurred and acts accordingly. The SIPL timeout value also
limits the period of time given to the payload to prepare for a payload reset.
• “Get Payload Communication Timeout Command,” on page 74
• “Set Payload Communication Timeout Command,” on page 74
Get Payload Communication Timeout Command
The IPMC supports reading of the payload communication timeout using the Get Payload
Communication Timeout command. This command has the following synopsis:
[B8 xx 09 0A 40 00]
The IPMC responds to the Get Payload Communication Timeout command with the
following reply:
[BC xx 09 00 0A 40 00 <payload timeout> ]
The
<payload timeout>
parameter is the payload communication timeout measured in
hundreds of milliseconds. Thus, the payload communication timeout may vary from 0.1 to 25.5
seconds. The default value of the payload communication timeout is specified by the
CFG_APP_SIPL_PAYLOAD_TIMEOUT Configuration Parameter.
Set Payload Communication Timeout Command
To change the payload communication timeout, the Set Payload Communication Timeout
command is used:
[B8 xx 0A 0A 40 00 <payload timeout> ]
Graceful Payload Reset
The IPMC supports the Graceful Reboot option of the FRU Control command. On receiving
such a command, the IPMC sets the Graceful Reboot Request bit of the IPMC status, sends a
status update notification to the payload, and waits for the
Graceful Reset command from the
payload. If the IPMC receives such a command before the payload communication timeout
time, it returns the 0x00 completion code (Success). Otherwise, the 0xC3 completion code
(Timeout) is returned.
The Graceful Reset command has the following synopsis:
[B8 xx 11 0A 40 00]
Note that the IPMC does not reset the payload on receiving the Graceful Reset command or
timeout. If the IPMC participation is necessary, the payload must request the IPMC to perform a
payload reset.
The Graceful Reset command is also used to notify the IPMC about the completion of the
payload shutdown sequence (refer to “Payload Shutdown Timeout,” on
page 75
).