Need better understanding different buses

[Ajay_MV]

Hi All,

I'm trying find some good resource on internet to better understand different buses. Viz.,

• VISA
• GPIB
• Serial
• Ethernet
• PCI
• PXI
• VXI
• IVI
• Modbus
• Profibus etc.., (generally all communication buses and protocols)

Whenever I work in some communication (say Serial or GPIB), I get through it using VISA functions in LabVIEW and with little knowledge about the actual bus.  But what I want to know is how such communication buses are different from each other.  Some brief about each buses.  Some sources on internet which explains them without getting too detail explanation.  A book suggestion will also be an appreciable.  

Thanks,

Ajay

[crossrulz]

Wikipedia always comes through for me.  And VISA is not a communication bus.  It is an abstraction layer so you don't need to know the low level driver stuff.

[jjp377]

Here are some links that might help

https://learn.ni.com/learn/article/getting-started-with-instrument-control-hardware-and-labview

https://www.ni.com/en/shop/data-acquisition/how-to-choose-the-right-bus-for-your-measurement-system....

https://www.ni.com/en/support/downloads/instrument-drivers/types-of-instrument-drivers.html

IVI is a type of Instrument Driver

[Ajay_MV]

jjp377,

They are very good links.  I still look for some details on Modbus, Profibus, Fieldbus..

--Ajay

[Jesse_D]

Modbus has a website that has the specs and explanations of most of what you want: http://modbus.org/tech.php

The Profibus website is also helpful: http://www.profibus.com/downloads/

However, if you want access to the low level specifications you need to buy them. 

Your list is missing the CIP protocols, maintained by odiva: http://www.odva.org/Home/tabid/53/lng/en-US/Default.aspx