Mitsubishi Electric Q12DCCPU-V - Standard RAM; Standard ROM; Work RAM; Battery-Backed-Up RAM

8
MEMORIES AND FILES
8.1 Memories of the C Controller Module
8.1.1 User memories
8 - 2
1
OVERVIEW
2
SYSTEM CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
ACCESS VIA NETWORK MODULES
6
PREPARATORY PROCEDURES AND SETTING
7
I/O NUMBER ASSIGNMENT
8
MEMORIES AND FILES
1) Standard RAM
The standard RAM stores C Controller module parameters and writes, reads
and saves data such as a user program file.
Backup the data stored in the standard RAM since the data in the standard
RAM may be lost if the battery life is expired.
• The following is an example of a script file to be backed up in a
CompactFlash card.
2) Standard ROM
The standard ROM is used for storing parameters of the C Controller module
and data (file) such as the user program.
3) Work RAM
The work RAM is a volatile memory where a user program of the C Controller
module is executed.
The user programs stored in the standard RAM, standard ROM, and
CompactFlash card are read to the work RAM for execution.
The operating system and system software of the C Controller module are also
read to the word RAM for execution.
4) Battery-backed-up RAM
The battery-backed-up RAM is a memory in which data to be retained after
power-off can be stored by a user program.
To access the battery-backed-up RAM, use any of the following functions in
the user program.
• QBF_WriteSRAM function
• QBF_ReadSRAM function
• QBF_WriteSRAM_ISR function
• QBF_ReadSRAM_ISR function
5) CompactFlash card
Installing a CompactFlash card into the CompactFlash card interface allows
the C Controller module to read and write data (files).
mkdir("/CF/BackUp")
xcopy("/RAM","/CF/BackUp")
sysLedSet(0xFF)