GPIB-USB- vs PCI GPIB Adapter

[hwalke]

How do these cards act differently on the GPIB bus? I am using the Prologix concept of GPIB to serial conversion and have it working perfectly until I attempt to change the address or use any sort of the ++command set type. I have my set up working fine with the NI PCI-GPIB adapter but get the error when attempting ibwrt:

[8100] <err cmpl>

error: EBUS

count:0

I need to tweak my software slightly to be able to talk to the GPIB-USB-HS. It similar to the problem this guy is having which he didn't solve:

https://forums.ni.com/t5/Instrument-Control-GPIB-Serial/Difference-programmatically-between-NI-GPIB-...

[Shezaan]

Hello, 

What instruments are you using, and when exactly do you encounter this error in your program? 

Regards, 

Shezaan Noorani

[hwalke]

See this older post were we have been discussing my problem:

https://forums.ni.com/t5/forums/replypage/board-id/140/message-id/76228

[Shezaan]

Hello, 

After taking a look at the other forum, it seems that the error only occurs when using NI USB to GPIB connection however when using the PCI to GPIB connection the problem does not occur? Is this accurate? I believe that Timothy posted a reason for why this may be occurring, but I will continue to dig into this issue to see what could be causing this EBUS error. 

Regards, 

Shezaan Noorani

Applications Engineering 

National Instruments

[hwalke]

You are 100% correct my friend. That is exactly the problem.

[Minions]

I created a vi that handles all of the necessary FTDI code for the Prologix GPIB-USB Controller.  Use this link: https://forums.ni.com/t5/Example-Program-Drafts/Prologix-GPIB-USB-Controller/ta-p/3539152

[hwalke]

Thank you, but I am not using LABVIEW, this is for an embedded design project. Also I removed the FTDI chip from my setup - I am going from straight from GPIB to serial. It seems like the NI card does its own type of "query," we are missing.