Lake Shore 211

[teslac]

Greetings,

    I have two LS-211 that I am getting a timeout on the VISA read from.  The curious thing is that they work fine in MAX with IDN?\n however when I open a VISA session and preform the write and read (write with term charactors CR/LF appended) the read times out.  I get the same behavior from my 121's and my Keithly 2200.  I am first trying to deal with the 211's first.  Any ideas why it works on MAX and not with VISA?

[Dennis_Knutson]

You should post your code but you probably aren't sending the termination characters correctly. You must click on the string control/constant and select '\' Codes Display. The Basic Serial Example has it done correctly. There is also an existing driver for both. Look at using them.

[teslac]

Thanks for the input but the good news is that I was able to get the 211 working when I queried temperature but it does not seem to work for IDN?.  Matters not since temp is what I am interested in.

    The issue I am having now is with the 121.  It times out on both MAX and the vi which is attached.  I am using a 8430/8 RS232 and a USB to DBN cable converter to adapt to the USB connection.  I assume that when doing this a straight through 232 cable is required and not a null cable.  The reason why I ask is that I am doing the same on my Keithleys and they also have the same behavior.

[Dennis_Knutson · Accepted solution]

Your comment on USB to DBN does not make any sense. Surely you wouldn't be trying to connect the serial to USB connection on an instrument?

[teslac]

Yes that is what I was doing.  Once I switched to USB all of my comm issues were resolved.  Live and learn...

[Dennis_Knutson]

Then you should mark my answer as the solution.

[nyc_(is_out_of_here)]

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@teslac wrote:

Yes that is what I was doing.  Once I switched to USB all of my comm issues were resolved.  Live and learn...

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Pretty pathetic choosing your own post as the solution.

[teslac]

Sorry guys my mistake.  Knutsons solution was the one I should have posted as a solution.

[Dennis_Knutson]

Then why haven't you changed it? You can click on Options to unmark it.

[nyc_(is_out_of_here)]

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@teslac wrote:

Sorry guys my mistake.  Knutsons solution was the one I should have posted as a solution.

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You did it!  The correct solution is marked. 🙂