Does not connect to my laptop


#1

I am using windows 7 and I have installed the software as described from your website but the adaptor does not connect to my equipment.
I have checked the baud rate and they match but still no connection.

In the device manager the you can see the device connected on COM3 ok but it will not connect to my equipment.

Any ideas on what to try next would be appreciated.
Regards
Steve


#2

Hi Steve,

Thank you for posting about your USB serial adapter. I’m sorry for the problems with getting it connected.

If it is showing connected to COM 3 in Device Manager, and COM 3 has been properly set in the communications software, the next thing to make sure of is whether you are using the correct cable for the equipment. Some equipment requires a Null Modem cable (send connects to receive) and others require a straight cable (send to send).

If that doesn’t solve the problem, could you please tell me the make and model of the device you are trying to connect and the communications software you are using?

Thank you,

David
Plugable Support


#3

Hi David,
Thanks for your reply, I will cover your suggestions and get back to you.
Can you tell me, should there be any LED activity on your device when the connection is made or on data transfer?
Regards
Steve


#4

Hi Steve,

There aren’t any LEDs in the adapter, so you won’t see any activity. Just to be sure, are you talking about our PL2303-DB9 USB-Serial adapter?

Thanks!

David


#5

Hi David,
It does not have a number on it, it is blue in colour and has a braided cable connected to the USB plug. The label on the top is “pluggable” logo.

Is this the correct one?
Steve


#6

Hi Steve,

Thank you for your answer. That sounds like the Plugable USB Serial adapter. There are no LEDs in there, so you won’t see any activity. However, the communications software you are using should be able to indicate if you are connecting to your serial device or not.

David


#7

Hi David,
Thanks for the reassurance, I have the correct one.
In summary, The device shows in my device manager when it is plugged in and disappears when removed. I am sure that this tells me that the device is configured and working ok.
I have set the communication port to com1 with transfer speed of 9600 baud which corresponds to the device I am connecting to.
The only thing I have not tried is a null modem cable but I am not sure this is the problem because before I changed my laptop to this new one I was connecting ok.
The program I am connecting to is a programming and configuration program for specialise fire control panels. I do not usually have a problem with this so I am running out of ideas. Do you have any more?
Steve.


#8

Hi Steve,

Sorry for the delay in answering.

I don’t think you need a null modem if the current cable was working on another computer. I suspect either a driver problem with the adapter or something in the settings for the communications software.

Could you run our diagnostic program? It will gather the device information and installation logs and help me understand what is happening.

To do this, please plug the adapter into your computer and connect to your device, then go to this page, and follow the instructions there:

http://plugable.com/support/plugdebug

Please send the resulting zip file directly to our support address at support@plugable.com.

Thanks!

David
Plugable Support


#9