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6.26 Device Initial Value
6
FUNCTIONS
(6) Precautions for the use of device initial values
(a) When device initial value data and latch range data are overlapped
In cases where both device initial value data and latch range data are overlapped,
the device initial value data takes priority.
Hence, the latch range data are also changed to the device initial value data when
the power supply is switched OFF and then ON.
(b) Disabling the device initial value from being set in a device area at the time
of STOP RUN
The device initial value data are reflected at the time of STOP RUN by the
device initial value function.
To disable the device initial value data from being reflected at the time of STOP
RUN in a certain device area (data that are set at power supply OFF ON and
are changed by a program), use the MOV instruction or similar one in the main
routine program so that the initial values will be set to the specified devices only.
Use the TO instruction to write data to the buffer memory of the intelligent function
module.
(c) Devices that require module synchronization setting
When specifying the following devices in the device initial value range setting,
make "Module synchronization setting" in the PLC system setting of the PLC
parameter dialog box.
If the module synchronization setting is not made, the device initial values may not
be set to the target module properly.
• Intelligent function module device (U \G )
• Link direct device (J \W , J \SW )
Remark
For details of the device initial value range setting, the device initial value data
setting operation, and the operation for writing the device initial values to the CPU
module, refer to the following manual.
GX Developer Version 8 Operating Manual
