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Posted to dev@plc4x.apache.org by "Mirko Pohland (JIRA)" <ji...@apache.org> on 2019/07/11 11:30:00 UTC

[jira] [Created] (PLC4X-134) S7 is terminating the connection during handshake

Mirko Pohland created PLC4X-134:
-----------------------------------

             Summary: S7 is terminating the connection during handshake
                 Key: PLC4X-134
                 URL: https://issues.apache.org/jira/browse/PLC4X-134
             Project: Apache PLC4X
          Issue Type: Bug
          Components: Driver-S7
    Affects Versions: 0.5.0
            Reporter: Mirko Pohland


When trying to connect to my S7-300 I get the following error (stack trace attached): 
{color:#FF0000} org.apache.plc4x.java.api.exceptions.PlcIoException: Connection terminated by remote{color}

After some debugging I found out that I can fix this issue by doing a small change in S7PlcConnection.java

 

From

        short calledTsapId = S7TsapIdEncoder.encodeS7TsapId(DeviceGroup.OS, 0, 0);
        short callingTsapId = S7TsapIdEncoder.encodeS7TsapId(DeviceGroup.PG_OR_PC, rack, slot);

where calledTsapId does not contain rack and slot to

        short calledTsapId = S7TsapIdEncoder.encodeS7TsapId(DeviceGroup.OS, rack, slot);
        short callingTsapId = S7TsapIdEncoder.encodeS7TsapId(DeviceGroup.PG_OR_PC, 0, 0);

Now I can connect to the S7.



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