Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 137

How to clear errors
Errors can be cleared in two ways:
■Using the engineering tool
Clear errors with the module diagnostics function of GX Works3. ( GX Works3 Operating Manual)
The event history of error clear using the engineering tool is stored in the CPU module connected.
■Using SM/SD
Clear errors by operating SM/SD.
1.
Check SD0 (Latest self-diagnostic error code) to identify what errors are detected.
2.
Clear the cause of each of the currently detected continuation errors.
3.
Turn on SM50 (Error reset) to clear the errors. When multiple continuation errors have occurred, all the errors are
cleared at once.
Precautions
This section describes some precautions to take when using the error clear function:
• Since the function clears all of the currently detected continuation errors at once, errors that should not yet be cleared may
be cleared.
• Use the RST instruction to reset each annunciator individually.
• Running the error clear function does not remove the cleared errors from the event history.
• The cause of an error which occurred in a module other than the target CPU module for the error clear cannot be eliminated
even though the error is cleared using this function. For example, when "Module verification error" (error code: 2400) or
"Module major error" (error code: 2450) occurred, the error cause cannot be eliminated even though the error is cleared in
the CPU module using this function. To eliminate the error cause, clear the error of the target module and reset the CPU
module.
6 RAS FUNCTIONS
135
6.3 Error Clear
6