Advantech TREK-520, User Manual

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Low Battery Protection
LOW _DELAY LOW_HARD_DELAY
When the system is ON, and
(1) The battery voltage (DC input) is lower than
LOW_THRESHOLD
(at T
6
)
(2) and this situation lasts for
LOW_DELAY
,
, then the system will send Power Button signal to OS (at T
7
) to start the shutdown
process.
At this time (T7), the
LOW_HARD_DELAY
is starting to countdown.
Once
LOW_HARD__DELAY
is over, the system power is removed abruptly.
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Before T
1
The system stays off.
power is fed in, but Ignition is OFF.
T
1
Ignition is ON and the
ON_DELAY
is starting to count down.
T
1
~ T
2
This duration is and it is ranged from 1 to 18000 seconds.
T
2
Once the
ON_DELAY
is over, the system will stay On or OFF, depending
on the BIOS setting “POWER-ON after Power Fail”.
If “POWER-ON after Power Fail” is set as ON, the system will be powered
ON.
If “POWER-ON after Power Fail” is set as OF, the system will stay OFF
and you could press the power button to turn on system.
T
2
~ T
3
The system is under normal operation.
T
3
At this time, the Ignition is OFF, and
OFF_EVENT_DELAY
is starting to
count down.
T
3
~ T
4
This duration is
OFF_EVENT_DELAY
and it is ranged from 1 to 18000
seconds.
T
4
When the
OFF_EVENT_DELAY
is over, the system will send a power
button signal to the OS and the user application should prepare the
shutdown process.
The
HARD_OFF_DELAY
is starting to count down.
T
4
~ T
5
This duration is
HARD_OFF_DELAY
and it is ranged from 1 to 18000
seconds.
T
5
When the
HARD_OFF_DELAY
is count to zero, the system power is
removed abruptly to avoid extra and abnormal power drain from battery.
This parameter is fixed with a value of 60 seconds.
After T
5
The system stays off.
System OFF
Send Power
Button Signal
Low Battery is
Detected
System stays ON
T
8
T
7
T
6