User`s guide
2.2.2
AUTO/RESTART
Switch
This three-position switch controls the machine
in
a power-up sequence, power restoration and software
crash. The three positions of the
AUTO/RESTART
switch and the functions
of
each are shown in Table
2-3.
Position
OFF
ON
BOOT
Table 2-3 The Functions
of
the Three-Position
AUTO/RESTART
Switch
Function
The system halts and prints the console prompt
(»»
after loading the micro-
code or executing a
HALT
instruction.
The system loads the microcode and bootstraps the system disk using the boot-
strap command procedure
(DEFBOO.CMD) automatically, if one
of
the follow-
ing conditions occur:
• During initial power-up
• After a brief power failure
• After the
CPU
microcode detects an error condition
(HALT
instruction
is
executed
in
the kernel mode)
This momentary contact position reboots the system (using
DEFBOO.CMD)
when the system
is
in the console mode
(»>
is
displayed on the console
terminal).
2.2.3
State
Indicator Lights
The functions
of
the state indicator lights on the front panel are shown in Table 2-4.
Table 2-4 Functions
of
the
Front
Panel
State
Indicator Lights
Light
Function
RUN
The processor
CPU
is
executing instructions.
DC
ON
The dc voltages are applied to the system.
BATT
Indicates condition of battery backup unit
(BBU):
•
Constantly lit - BBU fully charged
• Blinking slowly - BBU charged
• Blinking fast - BBU discharging
•
Off
- BBU not present or not active
R/D
Remote diagnostics procedures are being performed on the system.
2-4