Mitsubishi Electric MELSEC iQ-R Series User Manual page 164

Setting value backup failure flag
Turning from OFF to ON on 'Setting value backup command' (Y8) writes the data in the buffer memory to the non-volatile
memory. This flag turns ON when the writing to the non-volatile memory has failed.
'Setting value backup command'
(Y8)
'Setting value backup completion flag'
(X8)
'Setting value backup failure flag'
(XA)
After turning from OFF to ON 'Setting value backup command' (Y8) again and the data writing to the non-volatile memory is
completed successfully, this flag turns OFF. For details on the data writing to the non-volatile memory, refer to the following.
Page 123 Writing data to the non-volatile memory
When an error of the data read from the non-volatile memory is detected at power-ON, 'Setting value backup
failure flag' (XA) turns ON and the temperature control module operates with the default values.
In this case, turn from OFF to ON 'Setting value backup command' (Y8) and write the settings to the non-
volatile memory.
When the data writing fails again, a hardware failure has occurred. Please contact your local Mitsubishi
Electric sales office or representative.
■Device No.
The following shows the device number of this input signal.
Signal name
Setting value backup failure flag
Setting change completion flag
Turning OFF and ON 'Setting change command' (YB) in the setting mode ('Setting/operation mode status' (X1): OFF) reflects
the value set in each buffer memory area to the controls. After the data is reflected, this flag turns ON. Turning OFF 'Setting
change command' (YB) also turns OFF this flag.
'Setting change command'
(YB)
'Setting change completion flag'
(XB)
This flag can be used as an interlock of 'Setting/operation mode command' (Y1).
■Device No.
The following shows the device number of this input signal.
Signal name
Setting change completion flag
APPX
162
Appendix 2 I/O Signal
ON
OFF
OFF
ON
OFF
During write
to memory
Executed in a program
Executed by the temperature control module
ON
OFF
ON
OFF
Executed in a program
Executed by the temperature control module
ON
During write
to memory
Error detection of write to memory
CH1 to CH4
XA
CH1 to CH4
XB