4: System Control
L1 Controller Functions
The following list summarizes the control and monitoring functions that the L1 controller performs:
•Controls voltage margining within the IRUs
•Controls and monitors IRU fan speeds
•Reads system identification (ID) PROMs
•Monitors voltage levels and reports failures
•Monitors and controls warning LEDs on the IRU
•Monitors the On/Off power switch
•Monitors the reset switch and the nonmaskable interrupt (NMI) switch
•Reports the population of the PCI cards and the power levels of the PCI slots in installed I/O blades
•Powers on the PCI slots and their associated LEDs
L1 Front Panel Display
Figure 4-2 shows the L1 controller front panel features.
L1 controller display
insideTM
Failure LED |
|
| NMI |
| Reset | ||
| Power button |
| |
| with LED |
| |
Figure | L1 Front Panel |
| |
82 |
|
