Memory Error

What does 0x80F1 mean?

A fatal error has occurred in the CPU's memory, indicated by A401.15. A bit in A403 will turn ON to show the location of the error, such as checksum errors in user program memory, PLC Setup, registered I/O tables, routing tables, or CPU Bus Unit Setup. This can be caused by power interruptions during data storage or corrupted settings, preventing the PLC from operating correctly.

• A403.00 ON: Checksum error in user program memory, possibly due to power loss during flash memory write.
• A403.04 ON: Checksum error in the PLC Setup.
• A403.05 ON: Checksum error in the registered I/O tables.
• A403.07 ON: Checksum error in the routing tables.
• A403.08 ON: Checksum error in the CPU Bus Unit Setup.

Click steps to track your progress.

1. 1

   If A403.00 is ON: Transfer the program again.

2. 2

   If A403.04 is ON: Clear the entire PLC Setup to 0000 and reenter all settings.

3. 3

   If A403.05 is ON: Initialize the registered I/O table and generate a new I/O table.

4. 4

   If A403.07 is ON: Initialize the routing tables and reenter the tables.

5. 5

   If A403.08 is ON: Initialize the CPU Bus Unit setup and reenter the settings.