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lchamarthi

Usb Compability

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Hi Everybody, We are interfacing DPS (Digital Power Supply) through software developed on VB at the supplier end. We got only Set Up files for installation & we installed. In between PC to DPS we have one RS 232 to 485 converter because DPS supports only 485 signal. PC (VB Software) <------>RS232<------->RS485<-------->DPS Now we would like to use USB instead of Com1 port at PC for communication. VB software is programmed to work with Com1 port only. If we want to change this one to USB, I it posiible to acheive communication for USB. (we have only set up files with us & code not available) Any help would be highly appreciated. Thanks in advance Lakshmi

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You're still having RS-485 on the other end then? You could buy a USB-RS232-adapter. COM port numbers at least on my Windows 2000 computers can be reassigned in Windows, so putting the USB adapter as COM1 shouldn't be a problem. If you're looking into using a native USB interface on the DPS, it won't be possible without a rewrite of your software - and probably a pretty big one, as USB is a real hog to program for compared to serial ports.

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