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5.2 High Performance Model QCPU, Process CPU, Redundant CPU, Universal Model QCPU
5.2.9 Execution of standard ROM/memory card programs (boot run)
5
MEMORIES AND FILES USED IN CPU MODULE
(6) Precautions when executing the programs in the standard ROM/memory
card
(a) Parameter storage location
1) High Performance model QCPU, Process CPU and Redundant CPU
When executing boot run, store the parameters (PLC parameters) specified in
the boot file setting to the standard ROM or memory card.
When the parameters are stored in the program memory, the CPU module
ignores the boot file settings of PLC parameter even if the parameter-valid
drive of DIP switches are set to the program memory. A boot is not executed
when the PLC is powered on or RESET status of the CPU module is cleared.
2) Universal model QCPU
When executing boot run, store the parameters (PLC parameters) specified in
the boot file setting to the memory card.
When executing boot run, store the parameters (PLC parameters) specified in
the boot file setting to the memory card.
The CPU module ignores the boot file settings of PLC parameter if the
parameters are stored in the program memory or standard ROM. A boot is not
executed when the PLC is powered on or RESET status of the CPU module is
cleared. ( Section 5.2.11)
When the following conditions a) and b) are met, the CPU module is not
operated by the parameters in the memory card, but operated by the
parameters in the program memory.
a) Parameters exist in the program memory.
b) The parameters in the memory card are not set as a boot file.
(b) Online change during boot run
1) Memory card (RAM)
When online change ( Section 6.12) is made to the program in the
program memory, the change can be updated to the program of the boot
source memory card (RAM).
2) Standard ROM/memory card (ROM)
Even if online change has been made to the program in the program memory,
the change is not updated to the program in the boot source standard ROM/
memory card (ROM).
Therefore, write the same file as the one written to the program memory to the
standard ROM/memory card (ROM) by performing the write to PLC (Flash
ROM). ( Section 5.2.7)
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