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5.4 File Operation by GX Developer and Handling Precautions
5.4.4 File size units
5
MEMORIES AND FILES HANDLED BY CPU MODULE
5.4.4 File size units
(1) What is file size unit?
When files are written to the memory area, the unit of storage capacity changes
depending on the target CPU module and memory area.
This unit is called a file size unit.
(a) File size units classified by memory areas
The following table indicates the file size units classified by the target CPU
modules and memory areas.
* 1 : The file size unit of the Flash card applies to the case where files are written to the Flash card by
selecting [Online]
[Write to PLC (Flash ROM)]
[[Write the program memory to ROM] in GX
Developer. (
Section 5.2.7(1)(a))
* 2 : 1024 steps/4096 bytes for the High Performance model QCPU whose first 5 digits of serial No. are
"04121" or earlier.
* 3 : 1024 steps/4096 bytes for the Process CPU whose first 5 digits of serial No. are "07031" or earlier.
* 4 : 512 bytes for the Q12HCPU and Q25HCPU whose first 5 digits of serial No. are "02091" or earlier.
Table5.18 File size units of CPU modules (classified by memory areas)
Module name
Memory area
File size unit of program memory,
standard ROM, Flash card
*1
Standard
RAM
Q00JCPU
1 step/4 bytes
----
Q00CPU, Q01CPU
4 byte
Q02CPU, Q02HCPU, Q06HCPU
128 steps/512 bytes
*2
512 byte
Q12HCPU
256 steps/1024 bytes
*2
1024 byte
*4
Q25HCPU
512 steps/2048 bytes
*2
Q02PHCPU, Q06PHCPU
128 steps/512 bytes
512 byte
Q12PHCPU
256 steps/1024 bytes
*3
1024 byte
Q25PHCPU
512 steps/2048 bytes
*3
Q12PRHCPU
256 steps/1024 bytes
Q25PRHCPU
512 steps/2048 bytes
Q02UCPU, Q03UDCPU, Q04UDHCPU,
Q06UDHCPU, Q03UDECPU, Q04UDEHCPU,
Q06UDEHCPU
program memory : 1 steps/4 bytes
standard ROM, Flash card : 128 steps/512 bytes
512 byte
Q13UDHCPU, Q13UDEHCPU
program memory : 1 steps/4 bytes
standard ROM : 256 steps/1024 bytes
Flash card : 128 steps/512 bytes
Q26UDHCPU, Q26UDEHCPU
program memory : 1 steps/4 bytes
standard ROM : 512 steps/2048 bytes
Flash card : 128 steps/512 bytes
Note13
Basic
Note5.16
The Basic model QCPU does not support the use of a Flash card.
Basic