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(2)
Writing a program
When writing data from GX Developer, programs and parameters are written to the program cache memory in the
CPU module. After the completion of the writing, the data are transferred to the program memory.
Figure 5.6 provides the flow of writing a program.
GX Developer
(3)
Transferring data to the program memory by GX Developer
Data can also be batch-transferred from the program cache memory to the program memory by selecting [Online]
[Program memory batch transfer] in GX Developer.
Figure 5.4 provides the transfer time required when data are batch-transferred to the program memory while the
CPU module is in the RUN status.
CPU module
Q00UJCPU, Q00UCPU, Q01UCPU, Q02UCPU
Q03UDCPU, Q04UDHCPU, Q06UDHCPU, Q03UDECPU,
Q04UDEHCPU, Q06UDEHCPU
Q10UDHCPU, Q10UDEHCPU
Q13UDHCPU, Q13UDEHCPU
Q20UDHCPU, Q20UDEHCPU
Q26UDHCPU, Q26UDEHCPU
Universal model QCPU
1) Data are written to the program
cache memory once.
Program
cache
memory
(SRAM)
<Drive 3>
Standard
RAM
(SRAM)
Figure 5.6 Flow of writing a program
Table5.4 Transfer time of program memory batch-transfer
CHAPTER5 MEMORIES AND FILES USED FOR CPU MODULE
2) After data are written to the program
cache memory, the data are automatically
transferred to the program memory.
<Drive 0>
Program
memory
(Flash ROM)
<Drive 4>
Multiple
Standard
CPU auto
ROM
refresh area
(Flash ROM)
Transfer time
Ts
320 + 4.8 (s)
Ts
260 + 4.7 (s)
Ts
439 + 6.2 (s)
Ts
600 + 8.0 (s)
Ts
839 + 11.4 (s)
Ts
1100 + 15.0 (s)
1
2
3
4
5
6
7
8
Ts: scan time (s)
5 - 9
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