[Nut-upsdev] Question about hardware failures / FSD

Daniel F. Dickinson cshore at thecshore.com
Tue Sep 29 22:23:14 BST 2020

Hello joão,

To get more responses you should plaintext email (standard for open source development mailing lists) instead of HTML mail.

>The UPS I am developing a driver to is able to report several flags for critical hardware conditions, like overheat, overload, inverter failure, output short etc. What should be the correct policy of operation >when such a condition occurs? I think that the an UPS in such a condition is not reliable and therefore a system shutdown should be called. However, the developer's manual and all other drivers I inspected >seem to call the FSD flag only when there is a shutdown already in progress (say, a countdown register is active).

The decision about whether to do a forced shutdown is, I believe, considered a local administrator decision.  I would suggest that you should make these 'events' like low batter or communications failure, and let the admin choose what to do about the event.

>So far none of my questions were answered, but I hope eventually someone will have some time to spend helping me.



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