Set Value Backup Function - Mitsubishi Electric MELSEC-Q series User Manual

4.13

Set Value Backup Function

Set values in the buffer memory can be backed up into the non-volatile memory.
The backup data are restored to the buffer memory when the power is turned off then on or when the CPU module is
reset. Therefore, the Initial setting program does not need to be reset.
(1) Condition
Use the set value backup function in a condition where no digital conversion is performed; set Disable (1) to
Conversion enable/disable setting (Un\G0) for all channels.
Check that digital conversion is disabled by confirming Converting or unused (0) is stored in Conversion
completed flag (Un\G10).
If the set value backup function is used when digital conversion is in process in even one channel, the error code
(115) is stored in Latest error code (Un\G19), and Error flag (XF) turns on. In this case, the set values are not
backed up.
(2) Corresponding buffer memory data
Buffer memory areas that correspond to this function are marked with
( Page 89, Section 6.1).
(3) How to use
1.
Set Disable (1) to Conversion enable/disable setting (Un\G0) for all channels.
2.
Turn on then off Operating condition setting request (Y9).
3.
Turn on then off Set value backup request (Y6).
For details on Set value backup request (Y6), refer to the following.
• Output signal (
(4) Precautions after executing the set value backup function
After the set value backup function was executed, the data restored to the buffer memory when the power was
turned off then on or when the CPU module was reset, are overwritten if the parameter settings on GX Works2
are changed.
Do not change parameter settings on GX Works2 after executing the set value backup function.
70
Page 87, Section 5.2.2)
in the list of buffer memory addresses