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What is the WS5A?
Power Management States
Power Management States
Introduction
This section introduces the Workstation 5A power management states in all
operating system configurations.
References to power management states are specified in bold capitol letters,
e.g.,
NOPOWER
the Workstation.
UNPLUGGED
•
The AC power cord is not connected to a wall outlet. Also referred to in the
ACPI specification as 'mechanical off'.
•
The Operator LED is Off.
•
The Operator LCD is blank.
The workstation can be safely disassembled when in this state.
NOPOWER (S5 or Soft Off)
•
The AC power cable is attached, but the operating system and applications
are not running. RAM contents are undefined.
•
The Operator LED is Off.
•
The Operator LCD is blank.
S5 is the ACPI 'soft-off' state where the power supply remains active, but
delivering minimal power to several key circuits in order to detect a
power-button press or Wake-On-Lan event.
It is not safe to disassemble the workstation when in this state. The power supply
heat sinks remain energized, presenting a shock hazard. Always remove the AC
power cord from the IO Panel before disassembling the workstation.
ON
•
The Operating System and POS application are operating. RAM contents
are maintained.
•
The Operator LED is solid White.
Last Power State Retention
The WS5A retains the last power state (
EEPROM checked by the BIOS each time it is powered on or the AC power
cable connected. In BIOS System Configuration Utility, the 'Last Power State'
field determines how the unit behaves when AC power to the unit fails and
then returns.
The default setting of 'Last State' means that if the unit is
fails, it returns to
operator. See Chapter 3 for more information.
1-16
, and
. See chapter 4 for more information about operating
ON
when AC power is restored with no action required by the
ON
Workstation 5A Setup Guide - Fourth Edition
or
) in an on-board
ON
NOPOWER
ON
and AC power
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