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<Reference: Universal model QCPU memory system configuration>
The memory of the Universal model QCPU consists of the following blocks.
Standard
ROM
Standard
RAM
ROM
Program memory
(program cache memory)
RAM
Parameter
Program
Device comment
Device initial value
Parameter
Program
Device comment
Device initial value
Parameter
Program
Device comment
Device initial value
Program
Parameter
Device comment
Device initial value
File register
File register
Local device
Sampling
trace file
File register
Local device
Sampling
trace file
CPU module
Memory card
Programmable
controller user data
Storage file used in latch
data backup function
File used in
SP.DEVST/S.DEVLD function
*1
*2
Module error
collection file
*1: A memory card cannot be used for Q00UJCPU, Q00UCPU, Q01UCPU.
*2: Q00UJCPU has no standard RAM.
• Program memory: A memory for storing programs and parameters for a CPU module
operation
A program operation is executed by transferring a program stored in
the program memory to the program cache memory.
• Program cache memory: A memory for operating programs
A program operation is executed by transferring a program stored in
the program memory to the program cache memory.
• Standard RAM: A memory for using file registers, local devices, and sampling trace
files without a memory card
Using the standard RAM as the file registers enables the high-speed
access as well as data registers.
The standard RAM is also used for storing the module error
collection file.
• Standard ROM: A memory for storing data such as parameters and programs
• Memory card (RAM): A card for storing the local device, debug data, SFC trace data, and
error history data with the parameters and program.
• Memory card (ROM): A Flash card for storing parameters, programs, and file registers.
An ATA card stores parameters, programs, and the programmable
controller user data (general-purpose files).