Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual page 30

Setting method
The link refresh is assigned in "Refresh Settings" under "Basic Settings". (Page 101 Refresh settings)
Precautions
■Latched devices of the CPU module
If data in latched devices of the CPU module are cleared to zero on a program when the CPU module is powered off and on
or reset, the data may be output without being cleared to zero, depending on the timing of the cyclic data transfer processing
and link refresh. To prevent data in latched devices from being output, execute the following methods.
CPU module device
Latch relay (L), file register (R)
CPU module device within the latch range
*1 For the initial device value setting of the CPU module, refer to the following.
 MELSEC iQ-F FX5 User's Manual (Application)
3 FUNCTIONS
28
3.2 Cyclic Transmission
How to disable the device data
Use the device initial value of the CPU module to clear the device to zero.
Delete all the latch range settings specified in "Latch Interval Operation Setting" under "Device Latch Interval
Setting" in "Memory/Device Setting" of "CPU Parameter".
*1