Mitsubishi Electric MELSEC iQ-R Series Manual page 36

Module change activation
The following shows the procedure for module change activation. In this procedure, set the target module to be ready for
online module change.
Module change activation
Turn on 'Module removal request
flag' (SM1602).
Module removal ready (4)
is stored in 'Online module
change progress status'
*1*2
(SD1617).
To "Module removal"
*1 For a positioning module, check also that the machine system is stopped.
*2 The RUN LED on the module turns off. However, if the replacement target module has a failure, the RUN LED on the module may not
turn off and 'Online module changing status' (SD1617) may become Module removal completion (5). Perform the following operations to
continue the online module change.
3 REPLACEMENT PROCEDURE
34
3.4 Changing a Module by Controlling Special Relays and Special Registers
No
Yes
Check the items of
troubleshooting No. 3,
and take the action.