Mitsubishi Electric MELSEC Q Series User Manual page 152

7 ONLINE MODULE CHANGE
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(c) Click the [Close] button to close the System monitor screen.
(d) Before resuming control, check the Q64TC for the following items. If any
fault is found, refer to Chapter 8 and take corrective action.
1) The RUN LED is on.
2) The ERR. LED is off.
3) The write error flag (Xn2) is off.
4) The hardware error flag (Xn3) is off.
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