18.
18 - 3
MEMORY CARDS AND BATTERIES
18.2 Handling Memory Cards
(1) Formatting memory cards
All memory cards used with QnACPU must be formatted.
The purchased memory card is not formatted. Use the memory card after formatting
with the GPP function.
(a) SRAM+E
2
PROM type memory card
Format both RAM and ROM.
If installed with only one of them formatted, the QnACPU detects an error
(ICM.OPE.ERROR).
For information on how to format SRAM and E
2
PROM, see the following
manual.
• GX Developer Operating Manual
• Type SW IVD-GPPQ Software package Operating Manual (Online)
(2) Installing the battery in the memory card
The memory card is packaged with a RAM memory bakup battery.To use the RAM
memory of the memory card, this battery must be installed first.
(3) Switch setting when using a memory card
When using a memory card, turn ON the memory card in/out switch which is close to
the connector.If it is set to OFF, the memory card cannot be used.
POINT
The battery installed in the CPU module does not back up RAM memories of
memory cards.
Also, a battery installed in a memory card does not back up the internal RAM of a
CPU module.