Omron CP1L-EL20DR-D, Руководство по эксплуатации

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Program Protection Section 8-7
Auxiliary Area Flags and Bits Related to Password Protection
8-7-2 Write Protection
Write-protection
Using the DIP Switch
The user program can be write-protected by turning ON pin 1 of the CPU
Unit’s DIP switch. When this pin is ON, it won’t be possible to change the user
program or parameter area (e.g., PLC Setup and routing tables) from the CX-
Programmer. This function can prevent the program from being overwritten
inadvertently at the work site.
It is still possible to read and display the program from the CX-Programmer
when it is write-protected.
CPU Unit DIP Switch
Confirming the User Program Date
The dates the program and parameters were created can be confirmed by
checking the contents of A90 to A97.
Name Bit
address
Description
UM Read Protection
Flag A99.00 Indicates whether or not the PLC (the entire user
program) is read-protected.
OFF: UM read protection is not set.
ON: UM read protection is set.
Task Read Protection
Flag A99.01 Indicates whether or not selected program tasks
are read-protected.
OFF: Task read protection is not set.
ON: Task read protection is set.
Program Write Protec-
tion for Read Protec-
tion A99.02 Indicates whether or not the write protection
option has been selected to prevent overwriting of
password-protected tasks or programs.
OFF: Overwriting allowed
ON: Overwriting prohibited (write-protected)
Enable/Disable Bit for
Program Backup A99.03 Indicates whether or not a backup program file
(.OBJ file) can be created when UM read protec-
tion or task read protection is set.
OFF: Creation of backup program file allowed
ON: Creation of backup program file prohibited
Pin Name Settings
SW1 User Program Memory Write Protection ON: Protected
OFF: Not protected