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https://issues.apache.org/jira/browse/PLC4X-44?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16994346#comment-16994346
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Christofer Dutz commented on PLC4X-44:
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Yes the api will change, but I guess it won't change fundamentally and we'll 
work on a proposal which the community can give feedback on. 

> [Modbus] Make the modbus driver support reading and writing of multiple values
> ------------------------------------------------------------------------------
>
>                 Key: PLC4X-44
>                 URL: https://issues.apache.org/jira/browse/PLC4X-44
>             Project: Apache PLC4X
>          Issue Type: Improvement
>          Components: Driver-Modbus
>            Reporter: Christofer Dutz
>            Priority: Major
>
> Currently the modbus driver would throw an Exception when writing more than 
> one item and/or value in one request 
>     Plc4XModbusProtocol.encodeWriteRequest 
> This however has to be possible. If the protocol itself doesn't support it, 
> we need to implement some automatic code similar to that of the S7 driver 
> (See: DefaultS7MessageProcessor and the PendingWriteQueue in S7Protocol)



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