Storage Of Errors; Error Reset - Mitsubishi Electric MELSEC Q Series User Manual

14.3.2

Storage of errors

When an error occurs in the QD73A1, the corresponding error code is stored in the buffer memory.
(1) ERR.1 and ERR.2
Errors are classified into ERR.1 and ERR.2 depending on the error details.
Error classification
ERR.1 (minor errors)
ERR.2 (major errors)
(2) Buffer memory areas for error codes
The latest error codes are stored in the following buffer memory areas every time an error occurs, deleting the
previous error codes. When there is no error or when the errors were reset, "0" is stored.
Error classification Buffer memory area name
ERR.1 (minor errors)
ERR.2 (major errors)
14.3.3

Error reset

Eliminate the error cause according to the corrective action described in the error code list (
14.3.4), then cancel the error status by turning on Error reset signal (Y28).
At the time, the QD73A1 operates as follows.
1
Clears "
2
Clears "
3 Turns off Error detection signal (X18).
Errors caused due to sequence programs.
Check the error code, and eliminate the error cause by correcting the sequence
program.
Hardware errors or errors caused due to control commands from external input
signals.
Check the error code, and eliminate the error cause on an external input signal.
Error code (ERR.1)
Md.3
Error code (ERR.2)
Md.4
Error code (ERR.1)" to 0.
Md.3
Error code (ERR.2)" to 0.
Md.4
CHAPTER 14 TROUBLESHOOTING
Description
Buffer memory address
104
105
Corresponding error
detection signal
Error detection signal (X18)
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