On the customer site, the issues 9206 and 26263 occurred randomly.
Are there any other potential factors that might be responsible?
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:
You could also change this behavior by backupping the data from DRAM differently.
See following AS-Help online link Hardening measures:
https://help.br-automation.com/#/en/4/automationruntime%2Ftargets%2Fsg4_gen%2Fremanentedaten%2Frem_error.html
Thank you, this gives an understanding of the 26263.
OK, maybe 26263 is not the reason of 9206, just caused by 9206, am I right?
OK, maybe 26263 is not the reason of 9206, just caused by 9206, am I right?
from my point of view: yes
