5
MEMORIES AND FILES USED IN CPU MODULE
5.2 High Performance Model QCPU, Process CPU, Redundant CPU, Universal Model QCPU
5.2.1 Memory configuration and storable data
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(3) Memory capacities and formatting necessities
Table5.5 shows the memory capacity and formatting necessity of each memory.
* 1 : When the memory contents become indefinite in an initial status or due to a dead battery, the
memory is automatically formatted when the PLC is powered off and on, or reset. Before use,
however, be sure to format the memory using GX Developer.
* 2 : The standard RAM capacity of the High Performance model QCPU varies depending on function
version upgrades. (
POINT
1. When data are written to each memory, the unit of storage capacity changes
depending on the target CPU module and memory area. (
2. For memory capacity calculation, 1 step is equal to 4 bytes.
Table5.5 Memory capacity and formatting necessity
Q02CPU
*2
Q02HCPU
*2
Q06HCPU
*2
Q12HCPU
*2
Q25HCPU
*2
Formatting
Program memory
112kbytes
(28ksteps)
112kbytes
(28ksteps)
240kbytes
(60ksteps)
496kbytes
(124ksteps)
1008kbytes
(252ksteps)
*1
Standard ROM
112kbytes
112kbytes
240kbytes
496kbytes
1008kbytes
Unnecessary
Standard RAM
64k bytes
128k bytes
256k bytes
*1
Memory
card
SRAM
card
Q2MEM-1MBS : 1M bytes
Q2MEM-2MBS : 2M bytes
Necessary
(Executed by GX Developer)
Flash
card
Q2MEM-2MBF : 2M bytes
Q2MEM-4MBF : 4M bytes
Unnecessary
ATA
card
Q2MEM-8MBA : 8M bytes
Q2MEM-16MBA : 16M bytes
Q2MEM-32MBA : 32M bytes
Necessary
(Executed by GX Developer)
Q02PHCPU
Q06PHCPU
Q12PHCPU
Q25PHCPU
Q12PRHCPU
Q25PRHCPU
Formatting
Program memory
112kbytes
(28ksteps)
240kbytes
(60ksteps)
496kbytes
(124ksteps)
1008kbytes
(252ksteps)
496kbytes
(124ksteps)
1008kbytes
(252ksteps)
*1
Standard ROM
112kbytes
240kbytes
496kbytes
1008kbytes
496kbytes
1008kbytes
Unnecessary
Standard RAM
256k bytes
*1
Memory
card
SRAM
card
Q2MEM-1MBS : 1M bytes
Q2MEM-2MBS : 2M bytes
Necessary
(Executed by GX Developer)
Flash
card
Q2MEM-2MBF : 2M bytes
Q2MEM-4MBF : 4M bytes
Unnecessary
ATA
card
Q2MEM-8MBA : 8M bytes
Q2MEM-16MBA : 16M bytes
Q2MEM-32MBA : 32M bytes
Necessary
(Executed by GX Developer)
Q02UCPU
Q03UDCPU
Q04UDHCPU
Q06UDHCPU
Q13UDHCPU
Q26UDHCPU
Formatting
Q03UDECPU
Q04UDEHCPU Q06UDEHCPU Q13UDEHCPU Q26UDEHCPU
Program memory
80kbytes
(20ksteps)
120kbytes
(30ksteps)
160kbytes
(40ksteps)
240kbytes
(60ksteps)
520kbytes
(130ksteps)
1040kbytes
(260ksteps)
*1
Standard ROM
512kbytes
1024kbytes
1024kbytes
1024kbytes
2048kbytes
2048kbytes
Unnecessary
Standard RAM
128k bytes
192k bytes
256k bytes
768k bytes
1024k bytes
1280k bytes
*1
Memory
card
SRAM
card
Q2MEM-1MBS : 1M bytes
Q2MEM-2MBS : 2M bytes
Q3MEM-4MBS : 4M bytes
Q3MEM-8MBS : 8M bytes
Necessary
(Executed by GX Developer)
Flash
card
Q2MEM-2MBF : 2M bytes
Q2MEM-4MBF : 4M bytes
Unnecessary
ATA
card
Q2MEM-8MBA : 8M bytes
Q2MEM-16MBA : 16M bytes
Q2MEM-32MBA : 32M bytes
Necessary
(Executed by GX Developer)