Connecting Labview 7.1 to GE 90-30 PLC

[wingnmbr11]

Hello,

I am trying to connect Labview 7.1 to a GE 90-30 and although I know what tools I need to use it, I cant figure out the specific details in connecting them. I am trying to run OPC 5.1 server and use DSC tags but dont know the fine details in setting up the connection. Is there a webcast out there somewhere or would someone be willing to tell me the steps.

Any help is greatly appreciated.

Jason

[MikeS81]

Hi Jason,

which configuration do you have? You can use a communication module to use for example the ModBus protocol.

Mike

[Charlie_P]

Hi Jason,

The link below is a great resource if you would like information and examples for DSC.

LabVIEW DSC 7.1 Course Material

     http://digital.ni.com/public.nsf/allkb/2D90E657B89EAE5886257109006849DD?OpenDocument

[wingnmbr11]

Hello Mike,

I am using SMPX? the default connector from the serial to power supply of Rack 0. I can verify my very simple LL code normally open and memory coil in Cimplicity so I know that there is a signal to be read if I can connect. I just cannot seem to establish a connection to Labview to read the memory of the PLC.

[parthabe]

Very useful link Charlie!

Thank you much!

[unclebump]

Try downloading a demo of the kepware opc server. Then use their opc quick client software to see if it can read anything. If you can get that to work, use portmon to monitor the serial port data stream. Then compare this to the labview datastream to see what is different. Addressing, cabling pinouts, baud rates,....

http://www.kepware.com/Spec_Sheets/GE_SNPX.html

Message Edited by unclebump on 06-16-2009 04:24 AM

[wingnmbr11]

Hello all who have replied so far it is much appreciated,

That being said I am still hung up on connecting to the PLC and viewing any tags whatsoever. I have now contacted our IT department to ensure that none of my NI or networking programs are being firewalled. I have come to that conclusion because I have done everything suggested and still cannot verify connectivity. I used Server Explorer and the only available tag I recieved was clients.

Ill post again after I get my firewall taken care of.

Regards, Jason

[wingnmbr11]

I also failed to mention that I am using SNPX protocol with a 374 CPU which I believe is incompatible with that protocol.. Is this true and if so is there a way around it?

[Burt_S]

I am still a little bit confused on your set-up.  Which OPC Server are you using?  Does this server have a driver for your device?  Is the problem between your device and the server, or the server and LabVIEW?

[wingnmbr11]

Hello,

I am using the NI Industrial Automation OPC server 5.1 with the GE 90-30 series selected with SNPX protocol - Com1. Then Server Explorer to explore the tags but the only tag I can select is Clients. I would think I would be able to see all of the variables/tags within Server Explorer that are loaded onto the PLC. Is this correct?