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CHAPTER5 MEMORIES AND FILES USED FOR CPU MODULE
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5.1 Memories Used for Basic Model QCPU
5.1.1 Memory composition and storable data
(2) Data that can be stored in each memory
Table5.1 provides the data that can be stored in each memory.
: Required, : Storable, : Not storable
*1: A drive number is used to specify a memory to be written/read by the external device using a sequence program or MC protocol.
Since the memory name is used to specify the target memory by GX Developer, the drive number needs not to be considered.
*2: Any of sequence program, ST program and SFC program data is necessary.
*3: To execute a program stored in the standard ROM, make the setting in the Boot file tab of the PLC parameter dialog box.
*4: Only one file register file can be stored in the standard RAM. ( Section 9.7)
*5: The device comments cannot be read by instructions in a sequence program.
*6: Set the area used by the system. ( Section 5.1.2(2)(b))
*7: Data that stores the label program configuration.
For the label program, refer to the following.
GX Developer Version8 Operating Manual
(3) Memory capacities and necessity of formatting
Table5.2 provides the memory capacities and necessity of formatting of each memory.
Format a memory requiring formatting by GX Developer beforehand.
*1: The standard RAM capacities of the Basic model QCPUs vary depending on their versions. ( Appendix 2.1)
*2: Formatting is unnecessary for the CPU module of function version B or later.
(Formatting the standard RAM from GX Developer to the CPU module of function version B or later displays the error code:
4150
H on the GX Developer screen.)
When data are written to each memory, the unit of stored file size depends on the target CPU module and memory area.
( Section 5.4.4)
Table5.1 Data that can be stored in each memory
Item
CPU module built-in memory
File name and
extension
Program memory Standard RAM Standard ROM
Drive 0
*1
Drive 3
*1
Drive 4
*1
Parameter PARAM.QPA
Intelligent function module parameter*
2
IPARAM.QPA
Program
*2
*3
MAIN.QPG
SFC Program
*2
*3
MAIN-SFC.QPG
File register
*4
MAIN.QDR
Device comment
*5
*5
MAIN.QCD
Initial device value MAIN.QDI
Label program
*11
PROJINFO.CAB
User setting system area
*6
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Table5.2 Memory capacities and necessity of formatting
Q00JCPU Q00CPU Q01CPU Formatting
Program memory
58k bytes 94k bytes 94k bytes
Necessary
Standard ROM
58k bytes 94k bytes 94k bytes
Unnecessary
Standard RAM
Unavailable
128k
bytes
*1
Necessary
*2