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15 MEMORY CARD FUNCTION
15.2 Boot Operation
Maximum number of boot files that can be specified
It is the same as the number of files that can be stored in transfer destination memory.
Operation when security functions are enabled
This section describes the operation when security functions are enabled.
■When a security key is set
When a security key is set to the boot target program file and the security of the program file does not match with that of the
CPU module, a boot error occurs. Also, when no security key is written to the CPU module, a boot error occurs as well.
■When a file password 32 is set
If a file password 32 is set on both the source boot file and destination file, the file can be transferred only when the passwords
match. Furthermore, the file transfer does not work if a file password 32 is set only on either one.
Precautions
The precautions on the boot operation are explained below.
• The parameter file existing on the module of the transfer destination is overwritten, when a parameter file is set to the boot
file. Further, if a parameter file is stored in the SD memory card, but not set to the boot file, the operation will follow the
parameter file on the module.
• Note that the model of the program written on the SD memory card (program specified in the boot file settings) and the
model of the CPU module must be the same.
Security key of boot target
program file
Security key of CPU module Security key match/mismatch Boot program execution
Set Written Match Execute
Written Mismatch Not execute (boot error)
Not written Not execute (boot error)
Transferring boot file Transferred boot file Password
match/
mismatch
Transfer
File File password 32 setting File File password 32 setting
Existing Set Existing Set Match Yes
Mismatch No
Not set No
Not set Yes
Not set Existing Set No
Not set Yes
Not set Yes