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5.1.10 Specifying valid parameters (parameter-valid drive setting)
Drives (memories) storing valid parameters are automatically specified by the system.
The valid parameters are determined by the priority of the drives where parameters are stored.
Settings by an user is unnecessary.
(1) Priority of the parameter-valid drives
Table5.6 provides the priority of the drives where parameters are stored.
Write parameters to be validated to the higher priority drives.
Figure 5.23 provides the operation flowchart for the CPU module to select parameter drives.
Table5.6 Priority of the drives
Priority Parameter drive
High
Low
1 Drive 0 (program memory)
2 Drive 1 (memory card RAM)
3 Drive 2 (memory card ROM)
4 Drive 3 (standard ROM)
Figure 5.23 Flowchart to specify drives storing parameters
Start
Are there the
parameters (boot file setting)
in the memory card?
No boot file setting
The boot file setting
is stored.
Boot data to the specified
transfer destination following the
boot file setting parameters in the
memory card (If the destination is
the program memory, the data
are also transferred to the
program cache memory).
Are there the
parameters in
the program
memory?
Yes (The parameters
are stored in the
program memory.)
Start the program by the
parameters in the program
memory.
End
No
No
(No parameters in the program memory)
Are there the
parameters in the
memory card?
Yes (The parameters
are stored in the
memory card.)
Start the program by the
parameters in the memory card.
(No parameters in the memory card)
Are there the
parameters in the
standard ROM?
Yes (The parameters
are stored in the
standard ROM.)
Start the programs by the
parameters in the standard ROM.
No (No parameters in
the standard ROM)
Error since parameters
are not stored
<The CPU module operates following concepts of the parameter-valid drive>