Another question about GPIB-232CV-A

[gpibssx]

i am using the GPIB-232CV-A to control a HP instrument through the RS232 port in the PC. I set the GPIB-232CV-A to be work on the CONTROLLER MODE.But when i write a command to the instrument , then i use a read command to get the message from the instrument .I find that the GPIB-232CV-a is always on the TALK statu,and the Listen LED can not ON. What is the problem? what else detail should i pay attention to? thanks a lot!

[AaronK]

Hi,

You have your 232CV-A set to C mode, thats good. It is not clear to me if you are able to read and write and the question is in reference to the LED's or you are having a functional problem with the 232CV.
Also, how are you communicating?

You might note that the GPIB232-CV-A is not compatible with instruments that require the EOI line to be asserted.

Three methods of signaling the end of a data transfer on the GPIB bus include EOS, EOI, and Count. The EOS (end of string) method requires sending a character that signifies the end of the transfer, such as a line feed. The EOI (end or identify) method sets the EOI line high when the last byte is being sent. The Count method has the receiving device read a certain number of bytes.

If your instrument
requires that the EOI line be asserted to signify termination of data transfer, the GPIB232CT-A may be a better choice.

Hope this helps out!

Best Regards,
Aaron K.
Application Engineer
National Instruments