> 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 <[email protected]
<mailto:[email protected]>>:
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 <[email protected]
<mailto:[email protected]>>:
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
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With Best Regards
Dmitry Shapovalov
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Dmitry Shapovalov
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