4 SETTINGS AND PROCEDURES PRIOR TO OPERATION

4.9.2 When mounting/dismounting the module

MELSEC-Q

Please read 4.1, "Handling Precautions" before mounting or dismounting the module, and make sure to pay attention to safety and handle the module properly during the operation.

When replacing the Q series C24 and QCPU, it becomes necessary to register the following data on the Q series C24 again for the module to be replaced.

•Q series C24: System setting data in the flash ROM

•QCPU: PLC parameters (I/O assignment, switch setting, etc.)

The procedure for replacing a module, including re-registration of data, is as follows.

<Operation procedure when replacing the Q series C24>

(Step 1) Read all the system setting data of the Q series C24 using the

Read from module function of GX Configurator-SC.

(Step 2) Save the system setting data read to the specified file using the

File Save function of GX Configurator-SC (1).

(Step 3) Turn the power supply to the Q series C24 off.

(Step 4) Dismount the cables and the module itself.

(Step 5) Replace the module and start up the module according to "4.2 Settings and Procedures Prior to Operation."

(Step 6) Read the data saved in (Step 2) back into the system and register the system setting data to the flash ROM of the Q series C24 using the

Write to module function of GX Configurator-SC.

<Operation procedure when replacing the QCPU>

(Step 1) Read the PLC parameters with GX Developer from the QCPU and save them.

(Step 2) Replace the QCPU. (See the user's manual for QCPU.)

(Step 3) Register the PLC parameter saved by GX Developer back into the QCPU again.

1 It is recommended to record and save the system setting parameters not only when replacing the module, but also when changing the system setting parameters using GX Configurator-SC.

4 - 33

4 - 33