Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 572

(5) Built-in Ethernet port communications
Item
The security function has been enhanced from
the password registration function to the file
File transfer function password 32 function. For this reason, the
(FTP server) keyword-set subcommand, that
sets/displays/clears the file access password, is
no longer supported.
*1 This applies when the QnUDE(H)CPU is replaced with the High-speed Universal model QCPU.
(6) Functions
Item
The security function, that limits accesses to the
files in the CPU module, has been enhanced
Security function
from the password registration function to the
file password 32 function.
If an extended SRAM cassette is used and the
Latch data backup to memory capacity of the standard RAM (drive 3)
standard ROM is larger than that of the standard ROM, data
cannot be backed up using this function.
The battery life-prolonging function is no longer
Battery life-prolonging supported. Without the use of the function, the
function battery life is as same as that of the
QnUD(E)(H)CPU.
570
Precautions
Precautions
*1
Replacement method
Use the FTP commands, passwd-rd and
passwd-wr, that set/display/clear the
read/write passwords of the file password 32
function.
Replacement method
Use the file password 32 function instead of
the password registration function.
Deselect the "Backup all files in the internal of
standard RAM" checkbox in the PLC System
tab of the PLC parameter dialog box.
The switch setting parameters are ignored and
the following operations are performed.
• Data held by the battery are not cleared nor
deleted.
• The bits, b0 and b1, of SD119 (Battery life-
prolonging factor) are fixed to 0.
Reference
QnUCPU User's Manual
(Communication via Built-in
Ethernet Port)
Reference
Page 206, Section 3.19
Page 253, Section 3.29 (1)
Page 249, Section 3.26, QCPU
User's Manual (Hardware
Design, Maintenance and
Inspection)