Errors And Warnings - Mitsubishi Electric MELSEC-L02SCPU User Manual

7.14

Errors and Warnings

This section describes errors and warnings of the positioning function.
(1) Error
When an error occurs, the following operations are performed.
• The I/O ERR. LED turns on.
• The Axis 1 error (SM1845) turns on.
• An error code corresponding to the error is stored to the Axis 1 error code (SD1845) in decimal.
• The Axis 1 axis operation status (SD1844) changes to error occurring (-1).
If an error occurs during operation, the axis decelerates to a stop. (This excludes situations that the range of
software stroke limits is exceeded when the target position is changed. ( Page 126, Section 7.10.6 (2) (b)))
Interface Target axis
Axis 1
Axis 2
Special relay
Axis 1
Axis 2
Axis 1
Axis 2
Special register
Axis 1
Axis 2
*1 Until the Axis 1 busy (SM1840) turns off, the Axis error (SM1845) does not turn off even when the Axis 1 error reset
(SM1850) is turned on, and accordingly the Axis 1 error code (SD1845) is not reset. Also, the Axis 1 axis operation
status (SD1844) does not change to standing by (0).
No. Name
SM1845
Axis  error
SM1865
SM1850
Axis  error reset
SM1870
SD1845
Axis  error code
SD1865
SD1844
Axis  axis
operation status
SD1864
CHAPTER 7 POSITIONING FUNCTION
Description
The occurrence condition of positioning function
errors is indicated. This relay turns off when the Axis
 error reset is turned on.
• Reset the Axis  error code.
• Turn off the Axis  error.
When an error occurs, the corresponding error code
is stored here. This register is reset when the Axis 
error reset is turned on.
When an error occurs, error occurring (-1) is set.
When the Axis  error reset is turned on, the value
changes to standing by (0).
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