Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 219

(6) Precautions
(a) Functions with restrictions
Some restrictions apply to the following functions when the CPU module is locked.
Function
CPU module change function with
memory card
Boot operation
Parameter-valid drive
Data logging function
Accessing files File transfer function
from an external (FTP)
device other than
MC protocol
a programming
GOT, EZSocket
tool
(b) Power-off or reset of the CPU module
Do not power off or reset the CPU module during the lock or unlock processing.
(c) Operations from multiple programming tools
If the lock or unlock processing is performed simultaneously from multiple programming tools, the first
operation is executed, and the second and later operations are ignored.
(d) Online operations from a different programming tool
Even if an online operation is performed from a different programming tool where the security key is registered
during the lock or unlock processing, the operation is not executed.
(e) During the execution of the CPU module change function with memory card
The CPU module cannot be locked.
(f) Number of connectable programming tools
The number of programming tools that can read/write files from/to the CPU module simultaneously while the
module is locked is 32.
(g) Files that are not targeted for access control
If an operation is performed from a programming tool to the initial device value and device memory files, which
are not targeted for access control, while the CPU module is locked, the security key needs to be
authenticated.
(h) Writing a drive heading to the program memory
A drive heading is not written to the program memory if the security key in the programming tool and the CPU
module does not match.
Restrictions
The function cannot be used.
The function cannot be used.
Parameters stored in a memory card (SD) are not
valid.
Device comments are not output to the data
logging file.
Access control target files are not accessed.
CHAPTER 3 FUNCTIONS
Reference
Page 259, Section 3.31
Page 104, Section 2.11
Page 42, Section 2.1.2
QnUDVCPU/LCPU User's Manual
(Data Logging Function)
QnUCPU User's Manual (Communication
via Built-in Ethernet Port)
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