About The Basic Model Qcpu's Memory - Mitsubishi Electric MELSEC-Q Series User Manual

6 FILES HANDLED BY BASIC MODEL QCPU

6.1 About the Basic model QCPU's Memory

6
Data Name
Parameter
Intelligent function module
parameter
Program
File register
Device comment
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(1) User Memory
A user memory can be created within the memory of the Basic model QCPU with
GX Developer/sequence program.
There are the following user memories.
• Program memory
• Standard ROM
The Q00/Q01CPU has built-in standard RAM.
(a) Program memory
This memory stores program used by the Basic model QCPU to actually
perform arithmetic operation.
Program stored in the standard ROM is booted (read) into the program
memory for arithmetic operation. (Boot operation)
A batch of parameter and program stored in the program memory can be
copied to the standard ROM.
(b) Standard ROM
Parameter and program are stored in the standard ROM. These data are
used for ROM operation of the Basic model QCPU.
(c) Standard RAM
This memory stores file register data.
The file registers of the standard RAM allow fast access like the data
registers.
(2) Types of Data Stored in the Basic model QCPU Memory
The table below shows the type of data stored in a program memory, standard
RAM, and standard ROM.
Q00JCPU Built-In
Program Standard
Memory ROM
2
REMARK
1: To execute a program actually, booting must be specified for the program
memory using the PLC parameter.
2: Data can be written with GX Developer. Device comments cannot be used in an
instruction of a sequence program.
3: Standard RAM hold a single file at a maximum of 32 k points.
Q00/Q01CPU Built-In
Program Standard
Memory RAM
1
2 2
: Needed,
MELSEC-Q
Standard File name
ROM
PARAM.QPA
IPARAM.QPA
1
MAIN.QPG
3
MAIN.QDR
2
MAIN.QCD
: Stored, : Not stored
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