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1.1 Features
1
OVERVIEW
(14)User programs can be stored in the built-in standard RAM or ROM.
The C Controller module has a built-in standard RAM or ROM.
Therefore, user programs can be stored even if there is no external memory such as a
CompactFlash card.
Data stored in the standard RAM are retained by battery power even if the C
Controller module is powered off or reset.
For the memory capacity, refer to the following.
Page 8-5, Section 8.1.1 (3)
(15)CompactFlash card allows large-volume data storage.
By using a CompactFlash card, the C Controller module can store large volumes of
data depending on the capacity of the card.
(16)Retention and monitoring of battery-backed-up RAM data
Once data are stored in the battery-backed-up RAM using a user program
(QBF_ReadSRAM, QBF_WriteSRAM, QBF_ReadSRAM_ISR, and
QBF_WriteSRAM_ISR functions), they will be retained by battery power even if the C
Controller module is powered off or reset.
This allows the user program to be executed with the data stored last time (when
power is turned off or reset) every time the power is turned on, even if the power is
turned off or reset.
The data in the battery-backed-up RAM can be monitored in C Controller setting
utility.
For the memory capacity, refer to the following.
Page 8-5, Section 8.1.1 (3)
(17)RAM disk function
The C Controller module can create a RAM disk on the work RAM using a user
program.
The FTP function allows transfer of files including user program files from a personal
computer to the created RAM disk in the C Controller module.
Compared with the standard ROM or CompactFlash cards, the speed of file access
from/to the RAM disk is faster.
Therefore, the RAM disk is a storage medium suitable for the data that do not need
battery backup or that will be used only during system operation.
The RAM disk is formatted when the C Controller module is powered off or reset.
For the memory capacity, refer to the following.
Page 8-5, Section 8.1.1 (3)
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