Mitsubishi Q00JCPU User Manual page 249

5
MEMORIES AND FILES USED IN CPU MODULE
(2) Writing programs
When executing the write to PLC operation from GX Developer, programs and
parameters are written into the program cache memory of the CPU module once, and
then transferred to the program memory after writing is completed.
Figure 5.18 shows the flow of writing programs
(3) Transferring data to a program memory by GX Developer
The batch transfer of data from a program cache memory to a program memory can
also be performed by [Online]
Also, transfer time will be prolonged by the time shown in Table 5.7 if performing batch
transfer of data to the program memory when the CPU module in the RUN status.
Q02UCPU
Q03UDCPU, Q04UDHCPU, Q06UDHCPU,
Q03UDECPU, Q04UDEHCPU, Q06UDEHCPU
Q13UDHCPU, Q13UDEHCPU
Q26UDHCPU, Q26UDEHCPU
(4) Checking the transfer status of data to a program memory
Transfer status to the program memory can be checked either on the Program
memory transfer status screen of GX Developer or in the special relay/special
register.
(a) Checking on the Program memory transfer status screen
(b) Checking method in the special relay/special register
5.2 High Performance Model QCPU, Process CPU, Redundant CPU, Universal Model QCPU
1) Data is written to the
program cache
memory once.
Programming tool
Figure 5.18 Flow of writing programs
Table5.7 Transfer time of program batch transfer
CPU model
Figure 5.19 shows the Program memory transfer status screen of GX Developer.
Figure 5.19 Program memory transfer status screen
Transfer status to the program memory can be checked in SM681 or SD681.
5.2.3 Program cache memory (Universal model QCPU only)
Universal model QCPU
<Drive0>
Program
Program
memory
cache
memory (Flash ROM)
(SRAM)
<Drive3> <Drive4>
Standard ROM
Standard RAM
(SRAM) (Flash ROM)
[Program memory batch transfer] of GX Developer.
Transfer time
Ts
Ts
Ts
Ts
2) Data is transferred to the program
memory automatically after
writing to the program cache
memory is completed.
CPU shared
memory
320 + 4.8 (s)
260 + 4.7 (s)
600 + 8.0 (s)
1100 + 15.0 (s)
Ts: Scan time (s)
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