Aprotech GOLUB 45 Series, User Manual, Page: 85 / 105

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APROTECH GmbH
Rathsbergstrasse 17
90411 Nuremberg / Germany
Trade register:
Nuremberg HRB 23727
USt.-Id-No.: DE 256 058 089
D-U-N-S: 31-260-0530
phone: +49 911 / 65 00 79-50
fax: +49 911 / 65 00 79-79
eMail: info@aprotech.de
Web: www.aprotech.de
Managing Director:
Peter Jung
Industrial Panel- and Box-PCs
4.14 Watchdog Timer
The watchdog timer secures the boot process by means of a timer. Once the timer expires, a
reset command is issued to initiate another booting process. There are two options in BIOS menu,
“ Automatically after POST ” and “ Manually after Entering OS ”. When “ Automatically after POST ” is
selected, the BIOS automatically stops the watchdog timer after POST (Power-On Self Test) OK.
When “ Manually after Entering OS ” is selected, the user must stop the watchdog timer once booted
into the OS. This guarantees the system can always boot into the OS, otherwise another boo-
ting process will be initiated. For information about programming watchdog timer, please refer to
Appendix A Using WDT & DIO .
To set the watchdog timer for boot in BIOS:
1. Press F2 when the system boots up to enter the BIOS setup utility.
2. Go to [Boot] menu.
3. Disable or select timeout value for [WDT for Booting] option.
4. Once you set a timeout value, the
[WDT Stop Option]
option appears. You can select
either “ Automatically after POST ” or “ Manually after Entering OS ”.
5. Once set, press F10 to save setting and exit.