GPIB-USB-HS communication with FRA

[Nilesh D]

Hi! All,I have hooked up GPIB-USB-HS to my frequency response analyzer. but when i try to send a communicate with the hardware from a software, it give me  error.I tried with Ni 488.2 ver 2.4 and ver 2.52 also but nothing helped me. In Ni spy the error is EABO(6) for  the command is "?FR" . In measurement & automation , I tried changing Bus timing from default 500nsec to 2usec, also changed I/O timeout from default 10sec to 30 sec. Default termination setting is set to 'Send EOI at end of write'. but still i get the same error..anyone has a sloution for this? I am attaching the NI spy caputre also. Thanks and help will be appreciated.

[Sarah_R]

Nilesh D,

The error you are currently seeing can be found within the NI-488.2 Help File. You can find this at the following location: Start >> All Programs >> National Instruments >> NI-488.2 >> NI-488.2 Help.

The description of the error EABO: indicates that an I/O operation has been canceled, usually due to a timeout condition. Other causes are calling ibstop or receiving the Device Clear message from the CIC while performing an I/O operation. Frequently, the I/O is not progressing (the Listener is not continuing to handshake or the Talker has stopped talking), or the byte count in the call which timed out was more than the other device was expecting.

The recommended possible solutions are as follows:
1) Use the correct byte count in input calls or have the Talker use the END message to signify the end of the transfer.
2) Lengthen the timeout period for the I/O operation using ibtmo.
3) Make sure that you have configured your device to send data before you request data.

Please give these suggestions a try. Thanks.

[safderalimd]

Nilesh are you from TRUST nagpur?

[Nilesh D]

No. But I am from Maharashtra.