Gold.pirat wrote: Hello
I think every ORNO counter has a similar working principle.
I got a post-warranty counter for resale, type ORNO OR-WE-501.
The meter was not used for billing purposes, but only for indicative purposes of energy consumption.
It is based on ST24C02 memory.
To reset it, clear this memory.
Save only "FF".
Regards
Gregory
Hello
Referring to the above statement, I confirm that the ORNO OR-WE-501 counter can be restored to its factory state; resetting its course. The procedure is simple and takes no more than 5 minutes. In addition, I will add that I am in possession of a new copy purchased in 2015, which I have not used, but I checked and it actually has only zeros. The second one, used with the course 82299.14, which needs to be reused after erasing the memory, has 00000.01. And one more thing at the end, there is no need to desolder the memory, just plug in the clip and clean it. That's it on this topic as for the 501 model, you have more in the photo.
Regarding the user's statement:
MarekS6 wrote: Hello, as I have the same problem, I do not create a new topic to not clutter the forum.
Has anyone managed to reset the counter on their own in the meantime?
I have 3 used OR-WE-505. I have a client for them, but they need to be reset...
After opening one of them, I see that there is no standard EEPROM there, but a system with the designation RC16V, which if I found it on google would mean FRAM with the full designation MB85RC16V.
What to clean it with? Will it work with the TL866 programmer and the miniPRO application ???
it is worth noting that in both models: 501 and 505 we have the same BU9793AFS processors and an additional 0C002 chip, i.e. the same design solution was used; the difference is the type of memory and I think it is due to the amount of data storage because the 505 model is a 3 phase meter. Comparing the locations of the memory signals, we have the same I2C communication; 5V power supply and ground. The only difference is that pins 1, 2 and 3 are NC on the 505 and ground on the 501; and the WP signal at 24c02 is inverted. I would read MB85RC16V as classic EEPROM 24c02; after reading in 501 we have 99% of FF only, only the first few bytes are written and they store a digit, so the memory is extremely oversized; maybe the 505 is the same. If that doesn't help, negate the WP signal through the NOT gate. And as a last resort, switch to the 24c02 system, enter only FF, try if it does not work, negate WP and I think it may be a solution to the problem with the 505 model. Overall, if you could read the RC16V as EEPROM, although it was FRAM, it was something. If someone has 505, test it and let others know.
