Mitsubishi Electric MELSEC-L LD75D, User Manual

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CHAPTER 15 TROUBLESHOOTING
15
15.
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15.4
Error and Warning Details
15.4.1
Errors
(1) Types of errors
Errors detected by the LD75 include parameter setting range errors and errors at the operation start or during
operation.
(a) 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 LD75 READY signal 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].
(b) Errors at the operation start or during operation
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 No. will
be stored in both the reference axis and the interpolation axis.
Note that, in the following cases, 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.
• When the interpolation axis is BUSY.
• When the error occurred in positioning data or parameters unrelated to interpolation control.
If the error occurred 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 occurred before the simultaneous start (illegal axis No., other axis BUSY, etc.), the error "Error
before simultaneous start" (error code: 501) will occur.
• If the error occurred after the simultaneous start (positioning data error, software stroke limit error, etc.), an
error code corresponding to the axis in which the error occurred will be stored. In this case, because a
simultaneous start cannot be carried out, the error code of the error "Simultaneous start not possible"
(error code: 532) will be stored in all axes in which the 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.
(c) Types of error codes
Error code Error type
001 to 009 Fatal error
100 to 199 Common error
200 to 299 Error at OPR or absolute position restoration
300 to 399 Error during JOG operation or during inching operation
500 to 599 Error during positioning operation
800 to 899 I/F (Interface) error
900 to 999 Error during parameter setting range check