NI PXI PROFIBUS Module for communication with S7-300 PLC

[Gilfoyle]

Hi everybody

I want to collect sensor datas from S7-300 using NI PXI (Windows-based). I have also sensors at PXI side. The main purpose is to collect all of these datas on the same LabVIEW VI as different tab control.

For this job, I think to buy NI PXI PROFIBUS Module. Can this be a solution for my aim? Is there any example such a this project?

Should my connection be like: S7-300>Profinet Cable>PXI Profibus Module>PC ??

[a_clucker]

Hi sefaa,

Yes, I think your setup is ok. The driver for the PXI PROFIBUS installs both an example for using the card as a slave an using the card as a master. These examples are specific to the PXI PROFIBUS card, and allow you to enter the addressing information to connect with the 3rd party device.

Also your connection looks right. Send data from the S7-300 to the PXI PROFIBUS card, which can then be processed on either the PXI controller or sent to a PC.

[Gilfoyle]

Sir, will we have to use RS485 cable in between PLC and this module?? Because our PLC Controller has PROFIBUS DP and this communicates with RS485 cable.

Does it matter for me?

[a_clucker]

Hi sefaa,

You're correct, PROFIBUS has its own specific cabling. The PXI PROFIBUS card uses a 9 pin D-sub connector, and you might need to look at the pinouts of PLC and PXI card to match them up. The PXI PROFIBUS' pinout is here on page 4 of the instructions. 

This is the best applied resource I've found on PROFIBUS wiring: Profibus Cable, Connector And Termination Tips - PLC Academy.

I hope these resources help.

[Gilfoyle]

Thank you sir. I will inform you when I complete the instructions

[Borjomy]

I recommend to investigate the possibility of connecting to the S7-300 via the S7-TCP protocol. Only an Ethernet connection is required. You become available DB, IO, M structure.