Beckhoff CB1061 Manual do Utilizador descarregar pdf (Página 50)

Chapter: Connectors Jumper Settings

page 50 Beckhoff New Automation Technology CB1061

3.5 Jumper Settings

3.5.1 Clear CMOS

In case the board doesn't start up anymore and BIOS setup is inaccessible there is a "last resort": You

can use the "Clear CMOS" jumpers to reset all CMOS settings to factory defaults. In order to do so you

need to shut down the computer, change the jumper settings from normal (pins 1 & 2 short) to "Clear

CMOS" (pins 2 & 3 short) first on jumper Clear CMOS 1 and then on jumper Clear CMOS 2, wait a few

seconds, put the jumpers back into normal position and reboot.

CAUTION

In order to avoid an undefined system state it is essential to ensure that the shorting of jumper Clear

CMOS 1 (J1800) takes place BEFORE and only combined with the shorting of jumper Clear CMOS 2

(J1801).

Furthermore please notice, that if you reset the CMOS this does not only bring all settings made in BIOS

setup back to default values, it also clears the date and time information stored in CMOS. So don't forget

that, after the Clear CMOS procedure, you will have to set the clock again.

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Beckhoff CB1061 Manual do Utilizador Página 50