[Development] modbus over serial port on windows 7 ?

[Denis Shienkov]

 > But why ?

I don't know.. maybe the Qt Modbus Master closes the connection without 
waiting of data send,

maybe something else..

PS: I just have checked the QSerialPort autotests with the PL2303 on 
Windows - all worked.

PS2: You can try to use the Terminal Example (from the Qt Serial Port) 
with the Rx/Tx connected,

to check that your serial port works.


31.05.2016 13:17, Dmitry Shapovalov пишет:
> Yep. That's right. It is ERROR_OPERATION_ABORTED.
> But why ? Any other application works as expected with this hardware.
>
> And i confirm that 0x01040000000131ca and 0x0104024c494c06 are correct 
> request and response.
>
>
> 2016-05-31 15:05 GMT+05:00 Denis Shienkov <denis.shienkov at gmail.com 
> <mailto:denis.shienkov at gmail.com>>:
>
>     Seems, this:
>
>     > qt.modbus: (RTU server) QSerialPort error: QSerialPort::SerialPortError(ResourceError) "Операция
>     ввода/вывода была прервана из-за завершения потока команд или по
>     запросу приложения."
>
>     It is an 'ERROR_OPERATION_ABORTED', that can be caused by
>     ::CancelIo() (e.g. when the serial port closes) or by a HW problems.
>
>     BR,
>
>     Denis
>
>
>     31.05.2016 12:23, Dmitry Shapovalov пишет:
>>     Thanks for reply Ralf. Email more preferable for me.
>>
>>     Can you tell me what type of adapter you are using? Which version
>>     of qtserialport are you using? Maybe my problem is related to the
>>     type of serial port adapter. I tried use arduino with different
>>     usb-uart chips(ch430 and pl2303), but unsuccessfully.
>>
>>     Here is output of qt modbus master example
>>
>>     Запускается
>>     C:\Qt\Examples\Qt-5.6\qtserialbus\serialbus\modbus\build-master-Desktop_Qt_5_6_0_MinGW_32bit-Debug\debug\modbusmaster.exe...
>>     qt.modbus: (RTU client) Sent Serial PDU: 0x0400000001
>>     qt.modbus.lowlevel: (RTU client) Sent Serial ADU: 0x01040000000131ca
>>     qt.modbus: (RTU client) Send failed: 0x0400000001
>>     qt.modbus: (RTU server) QSerialPort error:
>>     QSerialPort::SerialPortError(ResourceError) "Операция
>>     ввода/вывода была прервана из-за завершения потока команд или по
>>     запросу приложения."
>>     qt.modbus.lowlevel: (RTU client) Response buffer: "01"
>>     qt.modbus: (RTU client) Modbus ADU not complete
>>     qt.modbus.lowlevel: (RTU client) Response buffer: "0104024c494c06"
>>     qt.modbus: (RTU client) Received ADU: "0104024c494c06"
>>     qt.modbus: (RTU client) Cannot match response with open request,
>>     ignoring
>>
>>     Look like it actually sends request, but qtserialport reports
>>     error, so qtserialbus(modbus) ignores response.
>>
>>
>>     2016-05-31 11:59 GMT+05:00 Ralf Nolden <nolden at kde.org
>>     <mailto:nolden at kde.org>>:
>>
>>         Am Dienstag, 31. Mai 2016, 09:34:19 schrieb Dmitry Shapovalov:
>>         > Hello,
>>         > can someone confirm that modbus over serial port is working
>>         on windows ?
>>         I have tested modbus over serial port on windows with two
>>         Schneider Electric
>>         PLCs, a Twido and a Premium, both with TCP and RS485. We
>>         could evaluate your
>>         problems on IRC if you want.
>>
>>
>>         > all my experiments led me to the thought that it is
>>         absolutely broken.
>>         > i am using arduno as a modbus device. i tested it with
>>         qmodbus and modbus
>>         > poll. works great. but when i try to use modbus examples from
>>         > qt(qtserialbus/examples/serialbus/modbus/master), look like
>>         it can not send
>>         > request.
>>         > i tried release(5.6) and git version of qtserialbus and
>>         qtserialport
>>         > modules with no luck.
>>         >
>>         > i am using windows 7 on virtualbox.
>>         > arduino modbus library from here
>>         > https://github.com/smarmengol/Modbus-Master-Slave-for-Arduino
>>         > arduino sketch http://pastebin.com/FHW3B7TX
>>         >
>>         > it's me or it's really broken ?
>>
>>         --
>>         Kind regards,
>>
>>         Ralf Nolden
>>
>>         _______________________________________________
>>         Development mailing list
>>         Development at qt-project.org <mailto:Development at qt-project.org>
>>         http://lists.qt-project.org/mailman/listinfo/development
>>
>>
>>
>>
>>     -- 
>>     -- 
>>     With Best Regards
>>     Dmitry Shapovalov
>>
>>
>>     _______________________________________________
>>     Development mailing list
>>     Development at qt-project.org <mailto:Development at qt-project.org>
>>     http://lists.qt-project.org/mailman/listinfo/development
>
>
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>
> -- 
> -- 
> With Best Regards
> Dmitry Shapovalov
>
>
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