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AXP1440 Operations
82 AXP1440 Installation and Use (6806800H23U )
4.5.2 IPMC Circuitry
Each PEM is capable of monitoring voltage and circuit breaker status. The PEMs are loaded with
the AdvancedTCA IPMC firmware. Preprogrammed FRU and Sensor Data Record (SDR)
information reside on the PEM and is accessible from the SAM through the IPMB ports of the
PEM. In addition, the IPMC monitoring functions include digital inputs to detect circuit breaker
trips, voltage sensors to detect backplane voltages, current sensors to detect current to the
backplane, and on-board circuitry to detect failures on the PEM. The PEMs are managed by the
Sentry Shelf Management software. Refer to the
AXP1440 Subsystem IPMI Programmer’s
Reference guide listed in Appendix A, Related Documentation for more information.
Figure 2-3 on page 54 provides a conceptual view of the connections between the PEMs,
backplane, FTMs, and SAMs.
4.6 Fan Tray Modules
This section discusses the operation of the Fan Tray Modules (FTMs) of the AXP1440.
4.6.1 Description
The FTMs are loaded with AdvancedTCA IPMC firmware. The fans are controlled as a group
through the IPMI-based interfaces (IPMB) to the SAM. The IPMI interface is used for reporting
faults, events, and status.The shelf manager software performs management of the FTM
through the IPMB bus.The IPMC circuit provides temperature sensors for monitoring the
temperatures of the FTM board components and for monitoring the inlet and outlet air
temperature of the shelf. For further information, refer to the
AXP1440 Subsystem IPMI
Programmer’s Reference guide listed in Appendix A, Related Documentation .
Table 4-1. PEM IPMB Addresses
Description IPMB Address
PEM A 0x66
PEM B 0x68