Back Up Data; Eeprom Backup; Capacitor Backup - Mitsubishi FX1N-14MR-ES/UL Hardware Manual

FX1N Series Programmable Controllers
1.5

Back up Data

1.5.1

EEPROM backup

Data includes the Program, Comment, File Registers (D1000 ~ D7999), and parameter data.
This will be stored as long as the EEPROM is not damaged. Mitsubishi Electric has
guaranteed a life cycle time of 10,000 writes to the EEPROM memory. Users may experience
operational writes to the EEPROM in excess of 10,000; however, due to temperature effects a
quantitative estimation cannot be given.
If the PLC has been powered on for five minutes or more, the following device data will be
saved in the EEPROM at powerdown:
S0 ~ S127, M384 ~ M511, C16 ~ C31, C235 ~ C255, and D128 ~ D255.
1.5.2

Capacitor backup

The capacitor backed memory includes M512 ~ M1535, S128 ~ S999, T246 ~ T255,
C32 ~ C199, C220 ~ C234, D256 ~ D7999 and the RTC.
The capacitor backed memor y will retain data for a maximum of 10 days (Ambient
temperature: 25 °C), and requires 30 minutes to recharge upon power up.
Note: The FX
days (Ambient temperature: 25 °C), a peripheral backup power source must be provided.
does not have battery backup, if a system requires backup of more than 10
1N
Introduction 1.
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