Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 249

(2) Timing when initial device values are written to the specified device
The CPU module writes data in the specified initial device value file to the specified device or the buffer memory
of the intelligent function module when the CPU module is powered off and then on, is reset, or is set to the STOP
status and then the RUN status.
Setting of
initial device
value range
Setting of
GX Developer
initial device
value range
(3) Applicable devices
For devices applicable for this function, refer to the following.
Operating manual for the programming tool used
(4) Setting procedures
For setting procedures of initial device values, refer to the following.
Operating manual for the programming tool used
(5) Precautions
(a) When initial device value and latch range are overlapped
In that case, the initial device value data takes priority. Therefore, the latch range data will be overwritten to the
initial device value data after the CPU module is powered off and then on.
(b) Area disabling the initial device value setting when the CPU module is set from
STOP to RUN
The initial device values are also reflected when the CPU module is set from STOP to RUN.
For an area where the initial device values should not be set when the CPU module is set from STOP to RUN
(data that are set when the CPU module is powered off and then on and changed by a program), this function
cannot be used.
Use an instruction such as the MOV instruction in the main routine program so that the initial device values will
be set to the specified devices.
Use the TO instruction to write data to the buffer memory of the intelligent function module.
Program memory
Writing of initial
device value Initial
device
value file
CHAPTER 3 FUNCTIONS
Specified
device
(At power-off on, reset,
or STOP RUN)
Writing of initial device value
(at power off on, reset, or
STOP RUN)
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