Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 293

(1) Restoration by turning on SM1929
The backup data is restored in an optional timing.
Use the restoration by turning on SM1929 for checking the backup data and operation check before an actual operation. To
operate the system using the backup data, use the automatic restoration using SD918.
( Page 292, Section 3.32.2 (2))
Remark
The restoration by turning on SM1929 can be executed only when the operating status of the CPU module is STOP.
(a) Operating procedure
1.
Switch the operating status of the CPU module to STOP.
2.
Set the data to be restored with SD917 (Restoration target data setting).
3.
Set the restoration target folder with SD919, SD920, and SD921.
(Setting is not required when bit13 of SD918 = ON.)
4.
Set the each setting with bit13 to 15 of SD918 (Restoration function setting).
5.
Turn off and then on SM1929 (Restoration execution request).
SM1929
SM1928
(1) Restoration execution requested
(2) Turning on SM1928 (Restoration execution status flag) by the system
(3) Turning off SM1929 after completion of restoration by the system
(4) Turning off SM1928 by the system
If a restoration is completed with an error and SM922 (Restoration error check flag) turns on, check SD922
(Cause of error occurred at restoration), take corrective action, and then restore the data again as necessary.
Progression status of restoration can be checked in SD1925 (Number of backup/restoration uncompleted files) and SD1926
(Backup/restoration progression status). (
(1)
ON
OFF
(2)
ON
OFF
END END END END END END
Page 280, Section 3.32 (3))
CHAPTER 3 FUNCTIONS
(3)
(4)
END END END
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