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No. 1316 Re: Re: Re: Re: Re: EZL-70(A) abort his work after sending 8192 bytes. 2015-01-16

I have tested in various situations but I could not find any problem such as yours.

In the condition that you described at the end of your last inquiry, I found "Simple Test" program stops his operation. After I killed the program and run it again, EZL-70 worked fine with it. I did not reboot EZL-70.

Could you test it with another terminal program?

I used "teraterm" for sending data on both direction.
Sending 65536 bytes data on both direction was successfully transferred with the program.

Thanks in advance.
Best Regards,


> Joerg wrote:
> ------------------------------------
> Hello Support Team,
>
> thank you for the answer. I have checked the solutions, but nothing helps. Currently I am using RTS/CTS flow control and
> "Emulation of Baudrate". I reduced the size of data to 16 bytes.
>
> Now I send the 16 chars from one end to the other. Only one side can send, the other side waits until the 16 chars has been
> received. From my point of view the buffer should be empty after each conversation.
>
> My problem: The ELZ-70 stops his activity after 4000 till 250000 bytes. After reseting the EZL he works again.
>
> With a 0-modem cable, the conversation works fine and unlimited (>12 hours).
>
> You can test it with your own ezConfig, using the "Simple Test"!
> Please connect the Lan and COM and send 500 bytes in each direction several times.
> I tested this 5 times and I could not transfer more than 10000 bytes.
>
> Any ideas?
>
> Thanks in advance.
>
> Best Regards,
> Joerg
>
> > Sollae Systems wrote:
> > ------------------------------------
> > Thank you for your detailed information.
> >
> > This case seems to occur by buffer overflow of virtual COM port made by ezVSP.
> > I faced a similar problem with virtual COM port.
> > Here are solutions.
> > 1. Enabling RTS/CTS flow control on the COM5.
> > 2. Enabling [Emulation of Baudrate] option on the advanced menu of the virtual port setting.
> > (I recommend using the latest version of ezVSP - 4.1B)
> >
> > You can avoid the data loss using at least one of solutions.
> >
> > Best Regards,
> >
> > > Joerg wrote:
> > > ------------------------------------
> > > Hi,
> > >
> > > my situation is the following: On "Windows 7 Professional", I use two terminal programms on both ends (com5 and com10).
> > > Com5 is a virtual com port created by your ezVSP software. Com10 is the EZL-70(A).
> > > I am using this code to produce the error:
> > >
> > > void MainWindow::writeBlock()
> > > {
> > > QByteArray data;
> > > unsigned char c;
> > > c = 'A';
> > >
> > > if (serial->isOpen()) {
> > > for (int i = 0; i < 59; i++ ) {
> > > data.append(c);
> > > c++;
> > > }
> > > data.append('> ');
> > > for (int i = 0; i < 1000; i++ ) {
> > > if (serial->write(data)<0) {
> > > QMessageBox::about(this,"Error" ,serial->errorString());
> > > }
> > > }
> > > }
> > > }
> > >
> > >
> > > The direction com10 to com5 works fine. Only the way from com5 (virtual com port) to com10 is wrong.
> > > Please open the screenshot. The ABC... at the 8193 char has overwritten the abc.. !
> > >
> > > After further investigation I have found the following:
> > >
> > > 1) With ezVSP 4.0 D the transmission stops after 8192 bytes.
> > > 2) With ezVSP 4.1 B the transmission will be modified as you can see in the screenshot.
> > > 3) With a 0-modem cable between com5 and com10 everything is fine. (Using the same USB to RS232 dongles and the same testsoftware ).
> > >
> > > Please try to reprodruce this with ezVSP 4.1B.
> > >
> > > Thanks in advance.
> > >
> > > Regards
> > > Joerg
> > >
> > >
> > > > Sollae Systems wrote:
> > > > ------------------------------------
> > > > Hi.
> > > >
> > > > Unfortunately, we could not find any data loss with the same condition of yours.
> > > > We tried to send 16,384 bytes data to both socket and serial sides at the same time.
> > > > Can you give us more specific information about your situation?
> > > >
> > > > Thanks in advance.
> > > >
> > > > > Joerg wrote:
> > > > > ------------------------------------
> > > > > Hello Support!
> > > > >
> > > > > We are using a EZL-70 (A) with the firmware version 1.2E, 9600 baud, 8E1, "Tx Delay" is on, "Disable TCP Transmission Delay" is on as a "TCP Server".
> > > > >
> > > > > Whenever I send more than 8192 characters stops the transmission.
> > > > > The rest of the data will be lost. In the most cases, I can continue
> > > > > by sending the message again.
> > > > >
> > > > > Is there a new firmware to solve the problem?
> > > > >
> > > > > Regards,
> > > > > Joerg
Writer Sollae Systems Company