Power Management Mechanism - Advantech TREK-550 User Manual

threshold (LOW_THRESHOLD), VPM controller will go into LOW_DELAY stage and start
to count down. During the stage of LOW_DELAY countdown, if battery voltage is back
above LOW_THRESHOLD, VPM controller will stop count down and leave this stage. If
LOW_DELAY counts to zero, VPM controller will send an event (power button press) to
notify the system, go into LOW_ HARD_DELAY stage and start to count down. Once
LOW_ HARD_DELAY counts to zero, VPM controller will cut off the system power
abruptly to avoid draining out the cat battery.
The table below lists the user programmable parameters for VPM features:
ON_DELAY
OFF_EVENT_DELAY
HARD_OFF_DELAY
LOW_THRESHOLD (12V mode)
LOW_THRESHOLD (24V mode)
LOW_DELAY
LOW_ HARD_DELAY
Vehicle Power Management (VPM)
Power Button
is Pressed
Count down
to 0
Ignition → ON
TREK-550 User manual
Default value
Initial
System is OFF
Ignition → ON
ON_DELAY
Count down
to 0
System is ON
Ignition → OFF
OFF_EVENT_DELAY
Count down
to 0
HARD_OFF_DELAY
42
Acceptable range
2 second 1 ~ 18000 second
5 second 1 ~ 18000 second
60 second 1 ~ 18000 second
11.42 V
22.44 V
30 second
60 second
Count down
to 0
LOW_HARD_DELAY
Countdown
Car_batt_Vol
< Batt_Threshold
LOW_DELAY
Car_batt_Vol
> Batt_Threshold
10.09 ~ 12.25 V
21.11 ~ 23.28 V
1 ~ 3600 second
1 ~ 3600 second
to 0