Beijer Electronics (formerly QSI Corporation)

Manufacturer of Mobile Data and Human Machine Interface Terminals.
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PostPosted: Tue Aug 07, 2007 10:59 am 
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Joined: Sat Aug 12, 2006 6:33 pm
Posts: 57
Location: Richmond, VA
The past three G55's I've tried programming failed due to a mismatch in the number of bytes received versus expected. We program them using QlarityFoundry with the serial port set to 115 kB, 8N1, and no flow control. I have tried throttling back to 19.2 kB and that did work for one terminal but not the other two.



Are there other things I should try? Or avoid? Also, since our computers do not have RS232 serial ports we use a Keyspan USB serial adapter to communicate between the host and the terminal. We've used these for three years without issue, so I'm heistant to say the problem lies there.


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PostPosted: Tue Aug 07, 2007 11:52 am 
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Joined: Thu Mar 02, 2006 2:12 pm
Posts: 487
Location: Salt Lake City, Utah
If you are getting dropped bytes during a download here are some of the changes or combinations that I would try (not in any particular order):

- A different serial port, usb port, and/or usb->serial converter.

- A different PC and/or location (maybe something is causing noise).

- A different cable

- A different or lower baud rate



In my experience the built in serial ports are less likely to drop bytes than USB to serial converters. However I do have a couple different brands of USB to serial converters I use also without any problems.



USB to serial adapters I have:

http://www.usbgear.com/USB-COMi-M.html

http://www.usbgear.com/USBG-232MINI.html

_________________
Ron L.

http://www.beijerelectronicsinc.com/


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