User guide

Hardware
46
890 USE 108 00 August 2001
PCMCIA
Operations and
PLC Power Up
Reading the PCMCIA/FLASH RAM data is performed automatically.
The following table describes the PLC power up state in relation to PCMCIA loading.
FLASH RAM or
PCMCIA Card
PLC MEM
Switch
Concept
Dialog
Result
Application present Not
configured
Off If Dialog box
was checked, it
starts after
download.
Application is loaded from
the PCMCIA card to the RAM
of the PLC and the PLC
starts running automatically.
Application NOT
present
Not
configured
Off Not applicable PLC operates normally
Application NOT
present
Not
configured
On Not Applicable PLC operates normally
Application present Configured Off If Dialog box
was checked, it
starts after
download.
Application is loaded from
the PCMCIA card to the RAM
of the PLC and the PLC
starts running automatically.
Application NOT
present
Configured Off Not Applicable PLC operates normally
Application NOT
present
Configured On Not Applicable PLC operates normally
Note: If your application is stored in both internal FLASH and the PCMCIA card
and the battery backed RAM is lost on power-up, the PLC first checks the internal
FLASH, then the PCMCIA card.