Hi everyone,

Excellent work Chris,

Looking forward to testing the modification.

In our part of the world, the installed base of S7-300 and S7-400 is still
very large, so these features are important as they increase the
reliability of the transferred information.

I would add the following features:

. CPU status detection (start/stop state).
. Diagnostic buffer messages (system and user messages).
. Channel monitoring (ping)

Best regards,



El mié, 6 may 2026 a las 14:42, Christofer Dutz (<[email protected]>)
escribió:

> Hi all,
>
> I just wanted to take the opportunity to thank Cesar for the improvements
> he added to the S7 driver.
> I am not sure you all understand what he actually added and he never
> really advertised it to me that I grasped it.
>
>
>   *
> Alarming (S7 300 and 400 support alarming … this is like a subscription to
> an Event where the client is instantly notified once the event happens …
> this is really cool … unfortunately it only works with the old boys)
>   *
> Cyclic Data Exchange: Also only S7-300 and 400 … they generally support
> cyclic subscriptions
>   *
> S7H: High-availability connection to special S7 devices, that maintain
> multiple connections in parallel to provide redundancy and fault tolerance.
>
> So far I’m making good progress merging the S7 and S7-light back together
> and to SPI3 … I hope over the weekend I’ll be able to drop that driver too
> :-)
>
> Chris
>


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