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MELSEC-Q
6 HIGH PERFORMANCE MODEL QCPU FILES
(2) Types of Data Stored in the High Performance model QCPU
Memory or on the Memory Card
The table below shows the type of data stored in a standard RAM/standard ROM
or on a memory card.
High Performance model
QCPU Built-In
Memory
Card (RAM)
Memory Card (ROM)
Data Name
Program
Memory
Standard
RAM
Standard
ROM
SRAM Card Flash Card ATA Card
Remarks
Parameter
1 data/drive
Intelligent function
module parameter
1 data/drive
Program
1
1
1
1
Device comment
2
3
Device initial value
File register
5
4
Local device
1 data/CPU
module
Debug data
Failure history data
PLC user data
6
: Needed, : Stored, : Not stored
REMARK
1: Boot the program memory to execute a program.
2: Data can be written by operating from the GX Developer. Device comments
cannot be used in an instruction of a sequence program.
3: The read from a sequence program requires several scans.
4: A sequence program allows the read only. No data can be written through
access from a sequence program.
5: A standard RAM hold a single file.
6: Data can be written or read with the following instructions:
• S.FREAD (allows the batch read from a specified file on a memory card)
• S.FWRITE (allows the batch write to a specified file on a memory card)
The table below shows file names and extensions of data files stored in the High
Performance model QCPU or on a memory card.
Data name File name
Parameter PARAM.QPA
Intelligent function module
parameter
IPARAM.QPA
Program .QPG
Device comment .QCD
Device initial value .QDI
File register .QDR
Local device .QDL
Debug data .QTD
Failure history data .QFD
PLC user data .
The portions can be named by the user.
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