Where is RTSI trigger lines in 6711 card

Hi there,
I have a PCI-6711 card. The manual said it supports the RTSI trigger line to connect the external clock as the timing source. I try to find the pin associate with the RTSI in the layout for PCI 6711 but I didn't see any. I only see PFI8/GPCTR0_SOURCE. Is it the same thing? I am pretty confusing how to use external clock to replace the internal software-based clock. Thanks.
Solved!
Go to Solution.

TheRealMichaelJordan wrote:
Hi dragondriver,
Refer to this KnowledgeBase article for information on the RTSI trigger lines on PCI cards. The RTSI bus will allow allow synchronization between DAQ devices on the computer.
Regards,
Jordan G.
Thanks you. I didn't realize that there are some pin on the top of the card. But then cause my doubts. I have a 6711 card. Many posts said that it only support softwared based clock, I cannot use the external or hardware clock to drive the digital output. Ok, so my question is, can I connect the external clock to the RTSI pin so as a hardware clock and use it to drive the analog ouput and counter output? The manual said I can use the external clock connected to the PFI or RTSI, so are they the same. It is so confusing since I don't see any example to do that on 6711 card and I don't know which PFI pin I should go to ?

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Hi Shibaev,
Thanks for posting on the NI forums.
I have taken a look into this one. From what is documented in the Traditional NI-DAQ manual, and the DAQ help file, the trigger lines for PXI devices are referred to as RTSI lines. For PCI devices there is an optional connector for a RTSI cable to provide shared triggers in a desktop PC. With PXI these lines are built into the PXI chassis. Although PXI and PCI are different form factors for DAQ devices, the (Traditional) NI-DAQ driver refers to either RTSI lines or PXI lines as simply 'RTSI'.
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Attachments:
TriggerLineOptions.JPG ‏98 KB

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Solved!
Go to Solution.

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Thanks for posting this on the community page. What this error is telling you is that it can't route a trigger to your requested destination because something else has already reserved that trigger line. One pottential typo is that your second ExportSignal command specifies niFgenConstants.Marker and not .MarkerEvent. This is a simple error to resolve but there are many possible sources. Is it possible for you to share the full code with me? Or,maybe you could host a join.me session and I can look at your full setup.
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I'm trying to route a signal from a PXI-6251 PFI line to the Gate of a counter (PCI-6602) for pulse width and period measurements. When I add in the connect terminals VI, I get error code -89126: Trigger line requested could not be reserved because it is already in use. The documentation for the PXI-6602 says I can route directly from the RTSI bus to the gate of a counter. I'm not sure why this conflict is happening.
Attached is a VI showing my setup and jpg of the error I'm seeing. No error shows up until it hits the DAQmx Read VI.
Attachments:
Trigger Reserved.vi ‏35 KB
Trigger Reserved.JPG ‏54 KB

SirMutt,
The recommended way of making your connection would be to allow the driver to automatically configure the route for you. You can accomplish this by making the following changes to your code.
Also, I tested your original code with a PCI-6221 and a PCI-6602 and got it working after making the following change.
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Either way is an acceptable, but the first the recommended method. Have a great weekend.
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Message Edited by Ryan N. on 02-15-2008 03:19 PM
Ryan N
National Instruments
Application Engineer
ni.com/support
Attachments:
2008-02-15_150237.png ‏11 KB
2008-02-15_151534.png ‏2 KB

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Where is RTSI trigger lines in 6711 card

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