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Posted to issues@plc4x.apache.org by "Christofer Dutz (Jira)" <ji...@apache.org> on 2022/02/21 12:05:00 UTC

[jira] [Created] (PLC4X-335) Using single-byte modbus types resulted in unexpected behaviour

Christofer Dutz created PLC4X-335:
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             Summary: Using single-byte modbus types resulted in unexpected behaviour
                 Key: PLC4X-335
                 URL: https://issues.apache.org/jira/browse/PLC4X-335
             Project: Apache PLC4X
          Issue Type: Bug
          Components: Driver-Modbus
    Affects Versions: 0.9.0
            Reporter: Christofer Dutz
            Assignee: Christofer Dutz
             Fix For: 0.10.0


When reading single-byte values via Modbus, the driver unexpectedly created lists.

This was due to the fact, that in the DataIo module these types were aligned to 8bits and not 16bits as it's the case in Modbus. 

By increasing the reserved field for BIT to 15 bit and by adding a reserved byte to the BYTE, USINT and SINT types we're able to fix this issue.



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