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MELSOFT
7 MANAGEMENT OF DATA IN THE PLC CPU
(3) Comment range setting
(a) Write to PLC
Write to PLC is performed only in the range of comment range setting.
If comment range setting has not been made for the ACPU or QCPU (A
mode), device comments cannot be written to the PLC.
Using GX Developer, make comment range setting.
If comment range setting has not been made for the QCPU (Q mode) or
QnACPU, the specified device comment file is written to the PLC.
(b) Read from PLC
For read of device comments to PLC, the following screen appears.
The comment range setting made on the PLC CPU side and the device
comments in that range are read to the PLC.
If comment range setting has not been made for the QCPU (Q mode) or
QnACPU, the specified device comment file is read to the PLC.
POINT
• If you do not choose a paste (read from PLC) destination project but select a
folder and paste (drop) the source project, a new project is created and only the
specified comments are read. (The parameters are set to the initial values.)
Its project name is "GX Developer project".
If the project of the same name exists in the folder, the project name will be "GX
Developer project
" ( indicates a number in numerical order, starting from 1).
• When write to PLC is performed, an error will not occur if any write-disabled device
comment is included.
However, the write-disabled device comment is not written to the PLC.