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MELSEC-Q
7   ONLINE MODULE CHANGE 
 
(2) Dismounting of module 
 
(a)  After choosing [Diagnosis] - [Online module change] on GX Developer to 
enter the "Online module change" mode, double-click the module to be 
changed online to display the "Online module change" dialog box. 
 
 
 
(b)  Click the "Execution" button to enable a module change. 
 
 
 
If the following error dialog box appears, the user range cannot be saved. 
Click the [OK] button, and perform the operation in Section 7.3.6 (2)(c) and 
later. 
 
 
 
(c)  After confirming that the "RUN" LED of the module has turned off, remove 
the terminal block and dismount the module. 
 
POINT 
 
Always dismount the module. If mounting confirmation is made without the module 
being dismounted, the module will not start properly and the "RUN" LED will not be 
lit.