RE: Recommendation for USB to Serial Port converters

2004-04-13 Thread Tim Streeter
Hi All

Thanks for all of the replies.

The device from FTDI seems to be the way to go.

Tim
-Original Message-
From: Tim Streeter 
Sent: Thursday, 8 April 2004 11:33 a.m.
To: Info LabVIEW (E-mail)
Subject: Recommendation for USB to Serial Port converters


Hi All

I have been using cheap USB to serial converters, made by 'Planet', and
they have an annoying feature/bug of the same device getting alocated a
new port number if pluged into a differend USB port. This is not much of
a problem if only 1 usb to serial converter is used, but I am using 4
connected to a hub. I know the reason for this 'feature', it is because
the devices are cheap and only identified, by the driver, through its
place in the USB tree.

My question is:
Does anybody know of a USB to serial converter, that doesn't suffer from
the above feature, that they can recommend.

Thanks

Tim




Recommendation for USB to Serial Port converters

2004-04-08 Thread Tim Streeter
Hi All

I have been using cheap USB to serial converters, made by 'Planet', and
they have an annoying feature/bug of the same device getting alocated a
new port number if pluged into a differend USB port. This is not much of
a problem if only 1 usb to serial converter is used, but I am using 4
connected to a hub.
I know the reason for this 'feature', it is because the devices are
cheap and only identified, by the driver, through its place in the USB
tree.

My question is:
Does anybody know of a USB to serial converter, that doesn't suffer from
the above feature, that they can recommend.

Thanks

Tim




RE: Recommendation for USB to Serial Port converters

2004-04-08 Thread Sergey Liberman
Tim,

 I have been using cheap USB to serial converters, made by 'Planet', and
 they have an annoying feature/bug of the same device getting alocated a
 new port number if pluged into a differend USB port. This is not much of
 a problem if only 1 usb to serial converter is used, but I am using 4
 connected to a hub.
 I know the reason for this 'feature', it is because the devices are
 cheap and only identified, by the driver, through its place in the USB
 tree.

 My question is:
 Does anybody know of a USB to serial converter, that doesn't suffer from
 the above feature, that they can recommend.

I've been using USB-2COM dual port adapters - very convenient to use.
USB-4COM and USB-8COM adapters are also available. You can find them all at
http://www.easysync.co.uk/products.html

Don't know if it will solve your problem, but at least you don't have to use
more than one USB port with up to 8 devices.

   Sergey Liberman   [EMAIL PROTECTED]
   Solidus Integration   http://solidusintegration.com





Re: Recommendation for USB to Serial Port converters

2004-04-08 Thread Scott Hannahs
At 11:33 AM +1200 4/8/04, Tim Streeter wrote:
I have been using cheap USB to serial converters, made by 'Planet', and
they have an annoying feature/bug of the same device getting alocated a
new port number if pluged into a differend USB port. This is not much of
a problem if only 1 usb to serial converter is used, but I am using 4
connected to a hub.
I know the reason for this 'feature', it is because the devices are
cheap and only identified, by the driver, through its place in the USB
tree.

My question is:
Does anybody know of a USB to serial converter, that doesn't suffer from
the above feature, that they can recommend.

The keyspan twin adaptors do the same thing.  However I merely plugged them into all 
the ports and then for each port configured it to have the same port name using the 
driver software.  (ie modem and printer).  I then set up the VISA.ini file to use 
visa serial ports 1 and 2 for modem and printer.  This works fine, except for one 
bug in the Keyspan driver where you can't repeat this process for more than 8 ports or 
the configuration software locks up.

I think it may be inherent that a USB device is identified by the physical location in 
the network.

-Scott




RE: Recommendation for USB to Serial Port converters

2004-04-08 Thread Castro, Diego
No , I do not know, but what happens to you seems logical.  Anyway, you may
check to b-belect.com to see if their devices may do what you want,

Thanks

DC

-Original Message-
From: Tim Streeter [mailto:[EMAIL PROTECTED] 
Sent: Wednesday, April 07, 2004 6:33 PM
To: Info LabVIEW (E-mail)
Subject: Recommendation for USB to Serial Port converters

Hi All

I have been using cheap USB to serial converters, made by 'Planet', and
they have an annoying feature/bug of the same device getting alocated a
new port number if pluged into a differend USB port. This is not much of
a problem if only 1 usb to serial converter is used, but I am using 4
connected to a hub.
I know the reason for this 'feature', it is because the devices are
cheap and only identified, by the driver, through its place in the USB
tree.

My question is:
Does anybody know of a USB to serial converter, that doesn't suffer from
the above feature, that they can recommend.

Thanks

Tim