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5.2 High Performance Model QCPU, Process CPU and Redundant CPU
5.2.1 Memory configuration and storable data
5
MEMORIES AND FILES HANDLED BY CPU MODULE
(2) Data that can be stored into memories
Table5.4 indicates the data that can be stored into the program memory, standard
RAM, standard ROM and memory cards and the corresponding drive Nos.
: Necessary data, : Storable data, : Unstorable data
* 1 : To execute the program stored in the standard ROM or memory card, boot setting to the program
memory is required in the PLC parameter dialog box.
* 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 : One file register file and one local device file can be stored into the standard RAM.
Refer to CHAPTER 2 for the number of storable file register points.
* 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)
* 7 : Set the area used by the system. ( Section 5.2.2(3)(b))
* 8 : The drive No. is used to specify the target memory of read/write from the external device, etc.
using a sequence program or MC protocol.
Since the target memory name is specified on GX Developer, it is not necessary to take into
account the drive No.
Table5.4 Storable data and storage locations
CPU module built-in memories
Memory card
(RAM)
Memory cards (ROM)
File name and
extension
RemarksProgram
memory
Standard
RAM
Standard
ROM
SRAM card Flash card ATA card
Drive No. 0 3 4 1 2
Parameter PARAM.QPA 1 data/drive
Intelligent function
module parameter
IPARAM.QPA 1 data/drive
Program
*1 *1 *1 *1
***.QPG --
Device comment
*2 *3
***.QCD --
Device initial value ***.QDI --
File register
*5 *4
***.QDR --
Local device ***.QDL 1 data/CPU module
Sampling trace file ***.QTD --
Failure history data ***.QFD --
PLC user data
*6
***.*** --
User setting system
area
*7
-- --
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