Mitsubishi Electric MELSEC Q Series, User Manual

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Chapter 16 Troubleshooting
16.3 Error and warning details
[1] Errors
Types of errors
Errors detected by the Simple Motion module include parameter setting range
errors, errors at the operation start or during operation and errors detected by
servo amplifier.
(1) Errors detected by the Simple Motion module include parameter setting range
errors
The parameters are checked when the power is turned ON and at the rising
edge (OFF
ON) of the PLC READY signal [Y0]. An error will occur if there
is a mistake in the parameter setting details at that time.
When this kind of error occurs, the READY signal [X0] does not turn ON.
To cancel this kind of error, set the correct value in the parameter for which
the error occurred, and then turn ON the PLC READY signal [Y0].
POINT
Re-set the parameters after parameter initialization (refer to Section 14.2) if errors
(error code: 900 to 999) frequently occur and the Simple Motion module does not
start.
(2) Errors at the operation start or during operation (Simple Motion module
detection errors)
These are errors that occur at the operation start or during operation when the
positioning control, JOG operation, or inching operation is used. If an axis
error occurs during interpolation operation, the error code will be stored in both
the reference axis and the interpolation axis.
Note that, in the following cases (a) and (b), the axis error No. will be stored
only in the reference axis during analysis of the positioning data set in each
point of the positioning start data table.
(a) When the interpolation axis is BUSY.
(b) When the error occurs in positioning data or parameters unrelated to
interpolation control.
If the error occurs at the simultaneous start of a positioning operation, the axis
error storage details will differ depending on whether the error occurred before
or after the simultaneous start.
 If the error (illegal axis No. or other axis BUSY, etc.) occurs before the
simultaneous start, the error "Error before simultaneous start" (error code:
501) will occur.
 If the error (positioning data error or software stroke limit error, etc.) occurs
after the simultaneous start, an error code corresponding to the axis in which
the error occurred will be stored. Because a simultaneous start cannot be
carried out due to this, the error "Simultaneous start not possible" (error
code: 532) will be stored in all axes in which an error has not occurred.
The axis operation status will be displayed as "error occurring" for axes in
which an error occurred.
If an error occurs during operation, any moving axes will deceleration stop,
and their operation status will be displayed as "error occurring".
All axes will decelerate to a stop during interpolation operations, even if the
error occurs in only one axis.