GPIB Response Repeated

[BuschMan]

I am trying to communicate with a Sorensen HPD 60-5 Programmable DC Power Supply. I am using a GPIB interface, and VISA read/write commands. When I get a response from a query to the power supply each character is repeated. For example, ERR? is an error query, this should return ERR <error number>, instead it returns EERRRR <error number><error number>. Any help would be appreciated.

Justin Busch

REDCOM Laboratories

[craigherdman]

Justin, Does sending a *IDN? command elicit the same result? For oddities such as this I would recommend conducting an NI-SPY capture to really see what GPIB calls are being made. NI-SPY is a utility that allows us to log the exact driver calls + parameters that are being made. For more information see the following: Performing an NI-Spy Capture Feel free to post the .spy file here for more analysis. Craig H.

[BuschMan]

I appreciate the response, and I will keep NI Spy in mind in the future, however this problem was solved by simply right clicking on the VISA Write and checking Do I/O Synchronously.