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1. The V zone can set the corresponding hold byte in the system block. If there is no battery card, the data will remain for about 200 hours (maintained by the internal supercapacitor), the capacitor is dead, and the corresponding data is lost.
2. The V zone can set the corresponding hold byte in the system block. After installing the battery card, the data will remain for about 200 days. After the battery card is dead, the corresponding data is lost.
3. Write data in the data block to ensure that when the power is lost at any time, when the PLC is powered on, it can be automatically written to the corresponding area. (Not applicable to frequently modified data)
4. Use the program to write data to the permanent storage area. (This method is used with caution, frequent writes will cause the PLC to be scrapped)
5. Use the transfer command to restore the factory data to the corresponding address.
If it is placed in the M area, there are 14 bytes that will automatically write eeprom hold as long as the system block is set to hold.
If you are in the V area, you can find an entry in the menu, "Create a data block from RAM." After the creation of this data, the programming data block is maintained by the eeprom. And can be used as a later download. However, some process data that does not need to be maintained is thus maintained by the eepROM. When the power outage time is too long, the boot is written as the content of this data block. Pay attention to this effect.
February 07, 2023