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From Christofer Dutz <>
Subject Re: Source Time of PLC Value?
Date Fri, 05 Mar 2021 21:00:01 GMT

So far the only protocol I worked on, that supports this "quality of data" feature, was the
delta-v protocol. For all otbers we would have to provide the constant max value.

Unfortunately their was the only driver I wasn't able to finish. As I have no hardware available.

So this feature was discussed, but never implemented.


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From: Julian Feinauer <>
Sent: Friday, March 5, 2021 9:54:11 PM
To: Andreas Vogler <>; <>
Subject: AW: Source Time of PLC Value?

This is not a simple questing and depends on the protocol and device you are using. What are
you using?


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Von: Andreas Vogler <>
Datum: Fr., 5. März 2021, 21:04
Betreff: Re: Source Time of PLC Value?
Ah, forgot: and is there a status available? Valid/invalid/good/bad indicator of a plc value?

> On 05.03.2021, at 21:02, Andreas Vogler <> wrote:
> Hi,
> How can I get the source time of a PlcValue?
> a) from a subscription PlcSubscriptionEvent
> b) from a read request  PlcReadResponse
> Best regards,
> Andreas

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