Mitsubishi MELSEC LJ71C24, User Manual

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14 MAINTENANCE AND INSPECTION
14.2 When Replacing Modules
When replacing the C24 and LCPU, it becomes necessary to register the following
data again for the module to be replaced.
• C24: System setting data in the flash ROM
• LCPU: PLC parameters (I/O assignment, switch setting, etc.)
Please read the following manual before replacing the module, and make sure to pay
attention to safety and handle the module properly during the operation.
MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and
Inspection)
14.2.1 Procedure of C24 replacement and re-registration of data
The following shows the procedure of C24 replacement and re-registration of data.
For the method of LCPU replacement and re-registration of data, refer to the following
manual.
MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and
Inspection)
(1) Reading system setting data of C24
Read the system setting data from the target memory (flash ROM or buffer
memory).
1) Display the "Online Data Operation" screen.
[Online] [Read from PLC]
2) Select the "Intelligent Function Module (Buffer Memory)" tab.
The following screen is displayed.
(a) (d) (c) (b)
(e)
3) Select "Read". ((a) in the illustration)
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