FX1S Series Programmable Controllers
Introduction 1
1-12
1.5
Backup Data
1.5.1
Data Backup
Data includes the Program, Comment, File Register (D1000 ~ D2499), 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 power-down:
S0~S127, M384 ~ M511, C16 ~ C31, C235 ~ C255 and D128 ~ D255.
If the PLC is powered ON for less than 5 minutes, the above data is not saved!
1.5.2
Capacitor backup
Only the RTC is backed up by the capacitor.
The capacitor backed memory will retain data for 10 days. The capacitor requires 30 minutes
to recharge upon power-up. There is no internal hardware reset function, thus, after a 10day
duration the RTC data may be unfixed and not reset to 0.
