how to use TRG pine in PXI-8176 controller

[Vkumar]

Dear All,

 
        I have Thermocouple data acquisition system. In which there are 2 chassis, (1) PXI 1002 with

PXI8176 controller with RT, PXI 6071E DAQ card (2) SCXI 1001 with  SCXI 1125 card  and SCXI1327 block.

 

PXI 6071E  connected to SCXI 1125 with SH1006868 cable and adapter SCXI1349.

 

I am using Labview 8.6 , DAQmx9.0

 

 

I have develop program for continuous thermocouple acquisition. Now i want to make program on trigger based data acquisition.  When trigger pulse comes system starts to acquire data ( and log in file) for userdefine time and stop acquisition. Again when trigger pulse comes   system again starts to acquire and stop at define time.

There is one TRG pin on  PXI-8176 controller, Can i use that one and how i can use it? Or i have to use separate DIO line for trigger?

Can you guide me how i can develop such system.

 

Thank you.

 

--Vishnu

[Shreyas · Accepted solution]

Yes you can route a trigger to the PXI Trigger Lines in the backplane of the PXI chassis through the SMB connector located in the front panel of the PXI embedded controller.

Kindly refer to the following tutorial example or the same article on devzone

Hope this helps

Message Edited by Shreyas on 06-07-2010 10:58 AM

[Vkumar]

Thanks Shreyas,

          Once again you help me to solve my problem. 

           As i have already mention you i have develop temperature measurement system with-out trigger. Here i am attaching my project. Now, how i can make it trigger based, means when trigger pulse comes acquisition start and target send data after some time for example 5minutes stop acquisition and restart acquisition again when next trigger pulse comes and so on.

Thanks

--Vishnu

[Vkumar]

Dear Shreyas,

         Thanks for providing trigger maping example. But i have doubt, In the example PFI0 the input resource is TRIG input of PXI-8176 and the output (mapped) trigger ---> Trigger 0,1,2,3..... are the PXI_Trig 0 to 7 of pxi bus?   Because when i am using DAQmx Trigger Task--> in the source --> i have option like DEV1/PFI0 ...DEV1/PXI_Trig 0.....DEV2/PFI0....DEV2/PXI_Trig0....etc.

In my system i have PXI 1002 chassis (4 slot)

In Slot 0----> PXI 8176 controller having TRIG pin.

     Slot 1 ----> PXI 6602 timer card   (DEV1)

    Slot 2 ---> PXI 6071E DAQ card in which i am doing acquisition.  (DEV2)

I want to develop trigger based data acquisiton in PXI 6071E.

Thanks

Regards

Vishnu

[Vkumar]

Dear Shreyas,

      Thanks for solution. I understand that PXI0 if the SMB trigger line. Now my trigger is working fine.

Thanks.

--Vishnu