Power Modes; On Mode (D0); User Idle / Backlight Off Mode (D1); System Idle / Display Off Mode (D2) - Honeywell Thor VM1 Reference Manual

Power Modes

The Thor VM1 supports the four standard Microsoft Windows CE power management modes: On (D0), Backlight Off (D1),
Display Off (D2) and Suspend (D3).

On Mode (D0)

When the Thor VM1 is attached to either vehicle power or an external power supply or is operating from the UPS battery and
the power button is pressed, the Thor VM1 is in the On mode. In this mode, the keypad, touchscreen and any attached
peripherals such as a scanner function normally. The display remains on until the backlight timer (if enabled) expires.

User Idle / Backlight Off Mode (D1)

Backlight is dimmed, but display is readable. The device transitions to this mode from On after the User Idle timeout period has
passed without a primary even occurring.

System Idle / Display Off Mode (D2)

Backlight and display are off. The status LED is solid green. The device transitions to this mode from User Idle after the
System Idle timeout period has passed without a primary event occurring.

Suspend mode (D3)

All devices that are not configured as wakeup events are powered off. The status LED is blinking green if external power is
connect and off if external power is not connected. The device transitions to this mode from System Idle after the Suspend
timeout period has passed without a primary event occurring.
Additionally the power button can be used to enter or exit Suspend mode:
If the Thor VM1 is On, pressing the power button immediately transitions the unit to Suspend.
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If the Thor VM1 is in Suspend mode, pressing the power button transitions the unit to On.
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Critical Suspend Mode

Critical suspend occurs where there is insufficient battery power to maintain operation. The device can transition to critical
suspend from any state when the UPS battery is sufficiently depleted and external power is not attached. Once the device is in
critical suspend, only a press of the power button returns the device to the On mode. When in critical suspend, attach a source
of power then press the power button to wake up the device.

Off Mode

The Thor VM1 is off when it is not connected to a power source and the UPS battery is depleted. However, an internal Real
Time Clock (RTC) powered by an internal battery maintains the date and time while the Thor VM1 is off. When the Thor VM1 is
off, attach a source of power then press the power button to turn on the device.
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