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https://issues.apache.org/jira/browse/PLC4X-204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17133429#comment-17133429
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Christofer Dutz commented on PLC4X-204:
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Hi Richard,
well actually not all protocols do support subscriptions. The S7 is sort of one
of them. I know one of our community members has sort of found a way to
subscribe to a very limited number of S7 devices, but this is actually a work
in progress which is not finished yet.
Protocols like the Modbus protocol don't support this at all.
However we are thinking of adding some functionality to simulate subscriptions
by using polling internally, but that feature has not yet been implemented.
Chris
> S7 Connection: Subscribing not possible
> ---------------------------------------
>
> Key: PLC4X-204
> URL: https://issues.apache.org/jira/browse/PLC4X-204
> Project: Apache PLC4X
> Issue Type: Bug
> Components: Driver-S7
> Affects Versions: 0.7.0
> Reporter: Bernhard Rupprecht
> Priority: Major
> Attachments: LogProgramExecution.txt
>
>
> I established a connection to a S7-1500.
> Connecting, Reading and Writing works fine.
> However, its not possible to get the subscribing feature to work.
> The PLC access level is set to full access and the put/get communication is
> on.
> I tried several connection strings including:
> s7://192.168.16.150 or
> s7:tcp://192.168.16.150?controller-type=S7_1500&remote-rack=0&remote-slot=1
> However, the program always states that the connection does not support
> subscribing.
> As I am very new to working with PLC4X:
> Did I forget to configure/activate some options in the PLC settings or is
> this really a bug in the S7- driver?
> Attached is the log while executing my test application.
> Thank you very much for your adice. If nessecary, I would be happy to provide
> you additional information.
>
>
>
>
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