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(1) Access control target files
With a security key, access to the following files is controlled.
•Program
• Device comment
• Parameter
• Symbolic information
(2) Access control target drives
With a security key, access to the following drives is controlled.
: Available, ×: Not available
● Do not execute the Write to PLC, Read from PLC, or Verify with PLC function to the access control target files in the SD
memory card. If executed, an error is displayed on the programming tool.
● If the CPU module is locked, device comments cannot be written to the SD memory card. Do not specify the SD memory
card as a device comment storage location in the QCDSET instruction or in parameter (PLC file setting).
(3) Online operations that require authentication
Authentication is required to execute the following operations to access control target files. ( Page 216,
Section 3.19.3 (5))
• Write to PLC
• Read from PLC
•Verify with PLC
• Delete PLC data
• Create/Change or Delete a password
• Online change
• Change TC setting
Drive Read/write availability
Program memory (drive 0)
SD memory card (drive 2) ×
Standard RAM (including an extended SRAM cassette) (drive 3)
Standard ROM (drive 4)
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