Mitsubishi Electric MELSEC-Q Series User Manual page 86

6 FILES HANDLED BY BASIC MODEL QCPU
Standard RAM
(kbyte)
Program memory
(kbyte)
Standard ROM
(kbyte)
: Before using the Basic model QCPU, always format the memory using GX Developer.
(However, if the memory is in an initial status or has been unformatted due to battery (Q6BAT) exhaustion,
the Basic model QCPU formats automatically at power-on or reset of the PLC.
6 - 3
(3) Drive Number
(a) The Basic model QCPU uses drive numbers to control program memory,
standard RAM and standard ROM. The GX Developer specifies a selected
memory (program memory, standard RAM or standard ROM) to execute
the read/write of parameter and program from and to the Basic model
QCPU. There is no need to specify the drive number when using the GX
Developer.
(b) The table below shows the drive numbers used to specify a selected
memory (program memory, standard RAM or standard ROM) when using a
sequence program. The drive number must be used to specify a selected
memory when the read/write is made through access from a serial
communication module.
QCPU built-in
(4) Memory Capacity and Formatting
The table below shows the size of a memory of the Basic model QCPU and
whether to format a memory.
Q00JCPU
None
58
58
Memory
Program memory
Standard RAM
Standard ROM
Q00CPU
64
94
94
Drive Number
Q01CPU Whether to Format
Not required.
94 Not required.
94 Not required.
MELSEC-Q
0
3
4
6 - 3