Platform Management ArchitectureIntel® Server Board SE7520BD2 Technical Product Specification
100 Revision 1.3
The LED can provide a mechanism for identifying one system out of a group of identical
systems in a high density rack environment
The Chassis Identify LED can be turned on either locally via the push-button signal, or by local
or remote software using the IPMI Chassis Identify command. The following list summarizes the
Chassis Identify Push-button and LED operation:
• The Identify signal state is preserved on Standby power across system power-on/off and
system hard resets. It is not preserved if A/C power is removed. The initial LED state is
Off when A/C power is applied.
• The IPMI Chassis Identify command can be used to control the LED. If the Chassis
Identify command is used to turn the LED On, the command will automatically time out
and turn off the LED unless another Chassis Identify command to turn on the LED is
received. The default timeout for the command is 15 seconds. The baseboard supports
the optional command parameter to allow the timeout to be set anywhere from 1 to 255
seconds.
• The optional timeout parameter in the Chassis Identify command also allows software to
tell the LED to go Off immediately.
• The Chassis Identify Pushbutton works using a “push-on/push-off” operation. Each press
of the push-button toggles the LED signal state between On and Off. If the pushbutton is
used to turn the LED On, it will stay on indefinitely, until either the button is pressed
again or a Chassis Identify command causes the LED to go Off.
Table 50. Chassis ID LEDs
Color Condition When
Off Ok
Blue
Blink Identify button pressed or Chassis Identify command executed
4.3.4.5 Status/Fault LED
The following table shows mapping of sensors/faults to the LED state.
Table 51. Fault/Status LED
Color Condition When
Solid System Ready
Green
Blink System Ready, but degraded. CPU fault, DIMM killed
Solid Critical Failure: critical fan, voltage, temperature state
Amber
Blink Non-Critical Failure: non-critical fan, voltage, temperature state
Off Solid Not Ready. POST error/NMI event/CPU or terminator missing
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