Mitsubishi Electric RD77GF8 User Manual page 24

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 link scan and link refresh. Take
the following actions not to output the data in the latched devices of the CPU module.
CPU module device
Latch relay (L), file register (R, ZR)
CPU module device within the latch range
*1 For the initial device value setting of the CPU module, refer to the following.
GX Works3 Operating Manual
When the inter-module synchronization setting is set to "Not Use", the link device (RX/RY/RWr/RWw) of the
station whose network synchronous communication is set to "Synchronous" is not refreshed.
1 FUNCTIONS
22
1.3 Cyclic Transmission
How to disable the device data
Use the initial device 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