The retentive data (e.g. permanent and remanent PV) is stored in the SRAM.
When the PLC is started, this data is copied to the PLC’s DRAM for speed reasons. In the event of a power fail, they are then copied back into the SRAM.
In your case, your watchdog issue (9206) has prevented the data from being copied back.
You would therefore first have to find the cause of the error, which is unfortunately not easy. It could be a hardware error. In most cases, however, it is probably a page fault that can no longer be properly reported by the system.
Please follow the tips below this post first: