Panasonic FP0 User Manual page 225

FP0
Notes
13) The possible number of write times by the EEP−ROM write
instruction is 100,000 or less.
14) The possible number of write times by the EEP−ROM write
instruction is 10,000 or less.
15) If the power supply is turned off while the P13 instruction is
being executed, the data written by the P13 instruction may
not be written in the EEPROM properly. Also, the area where
the internal relays, data registers and timer/counter are held
may not be held properly. Do not turn off the power supply
while the P13 instruction is being executed.
Specifications
12.1 Performance Specifications
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