External Trigger using PCI6071E and SCB100

[ma.amanian]

Hi All,

The program I am currently working on is reading in data using the PCI-6071E. Each data coming into the program is then compared to a threshold value (set by the user). If the data is larger than a threshold, I would like to send an external trigger to an output device (SD9 stimulator).

To make the problem simpler, I just want to test the external trigger itself. Therefore, I have taken one of the example VI's in labview (Write Dig Port). When turned on, it should sent output data and the light on the output device should turn on. Unfortunately, I am not having any success with this. When I run the program and change the values on the control, the light remains off.

I am currently using pins 31 (DIO3) and 35 (+5V) on the SCB-100 and I connect the cable from those two pins into my output trigger device. I have been coming across people using PFI0 and I'm wondering if I am using the wrong pins.

Thanks for your help.

[HeatherBaker]

Hi ma.amanian,

There are a couple things that I would like to note, +5V is a line that is always outputting 5V as long as the current limit is not exceeded.  The two pins that you are using are a DO pin and pin always outputting 5V rather than a ground.  Try using a combination like pins 31 and 33 or 35 and 33.  You will need to determine what type of trigger, your device is expecting, i.e. counter pulse, digital hi, etc.  Try using the Test Panels in Measurement and Automation Explorer (MAX) as a quick test.  Test Panels allow you to communicate with the hardware directly without using code.  PFI (Programmable Function Interface) can be used to route sample clocks, triggers, etc.  It varies from each device family, where the 6071E is a member of the E series family.  Hopefully this helps you get started!