Mitsubishi Electric MELSEC-Q Series User Manual page 95

3 SPECIFICATIONS
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(7) Default value write completion flag (Xn9)
(a) This signal turns on when default values of the Q62HLC are successfully
written to the buffer memory after Default setting registration start command
(Yn9) is turned on.
(b) When Default setting registration start command (Yn9) turns off, this flag
(Xn9) also turns off.
(c) Perform unused channel setting to an unused channel after default values
are written.
If the setting is not performed to the unused channel, the ALM LED of the
Q62HLC turns on.
ON
Yn9 OFF
OFF
Xn9
During write to buffer memory
(8) FeRAM write failure flag (XnA)
(a) This signal turns on when writing data in the buffer memory to FeRAM failed
after FeRAM backup start command (Yn8) is turned on.
• OFF : Writing data to FeRAM completed successfully
• ON : Writing data to FeRAM failed
(b) FeRAM write failure flag (XnA) turns off when data is successfully written to
FeRAM.
(c) When FeRAM write failure flag (XnA) turns on, the FeRAM contents are
undefined.
If the programmable controller CPU is powered on or reset with the flag
(XnA) on, the buffer memory contents become undefined as well. For this
reason, the Q62HLC operates with the default values.
ON
Default value write completion
MELSEC-Q
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