Advantech TREK-303, User Manual

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TREK-550/303 User Manual 34
LOW_DELAY stage and start to count down. During the stage of LOW_DELAY
countdown, if battery voltage is back above LOW_THRESHOLD, the VPM con-
troller will stop counting down and exit. If LOW_DELAY counts to zero, the 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, the VPM controller will cut off the system power
abruptly to avoid draining out the car battery.
The table below lists the user programmable parameters for VPM features:
Default value Acceptable range
ON_DELAY 2 seconds 1 ~ 18000 seconds
OFF_EVENT_DELAY 5 seconds 1 ~ 18000 seconds
HARD_OFF_DELAY 60 seconds 1 ~ 18000 seconds
LOW_THRESHOLD (12V mode) 11.42 V 10.09 ~ 12.25 V
LOW_THRESHOLD (24V mode) 22.44 V 21.11 ~ 23.28 V
LOW_DELAY 30 seconds 1 ~ 3600 seconds
LOW_ HARD_DELAY 60 seconds 1 ~ 3600 seconds