2.2.2Power ON Process

Overview

The ON process is provided to make the system ready for use (ON state). The actual process varies depending on the settings at that point in time and the last OFF factor (the cause of the OFF action).

ON factors:

Pressing the Power switch

Pressing the RESET switch

Power ON alarm

￿Reception of RING signal Mounting on the I/O Box

OFF factors:

Pressing the Power switch

Pressing the RESET switch

Auto Power OFF (APO)

Power OFF by software

￿Auto Power OFF due to lower battery voltage Emergency Power OFF due to lower battery voltage

Note:

For more information power OFF factors refer to Chapter 2.2.3 "Power OFF Process".

This ON process is divided into two processes: the "Resume process" for continuing the previous process and the "Boot process" for re-loading MS-DOS. The Boot process can be further broken into the "Application boot" and the "System Menu boot" processes.

￿Fig. 2.4

Boot Process

Application Boot Process

ON Process

 

Resume Process

System Menu Boot Process

Application Boot Process

Searches CONFIG.SYS and AUTOEXEC.BAT files according to the priority given to each drive and, if these files are found, sets the drive where these files are located as the current drive. (refer to ”Application Boot Process” on the next page).

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Casio IT-2000W manual Power on Process, Overview, On factors, OFF factors, Application Boot Process