Mitsubishi Electric L02SCPU User's Manual And Reference page 260

(4) Built-in I/O function error clear
An error can be cleared by specifying an axis of the positioning function or CH (channel) of the high-speed
counter function.
"Built-in I/O function error clear - axis/CH selection" screen
"Built-in I/O function - error clear confirmation" screen
"Built-in I/O function - error clear completion" screen
258
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
1.
Select the target item using the  and  buttons
and press the button.
OK
2.
Select "YES" using the  and  buttons and press
the button.
OK
3.
When the error is cleared successfully, either of the
screens shown left appears.
To return to the "Built-in monitor/error clear" screen,
press the button.
OK