Synchronize PCI- 5421 and PCI-6602

I am using a PCI 6602 to generate four pulse trains. I am also generating a signal with a PCI 5421 AWG. All signals are started at the same time by using a common start trigger. The problem I am having is that after they run for a while the 6602 and 5421 signal start drifting. I know in the past I had sync clocks in a PXI chassis but I am unsure how to syncronize the clocks using PCI card. I do have an RTSI cable linking the cards together so could someone please give me an example of how to sycronize these cards in Labview (8.2)

Hello Kiebach,
You seem to be connecting the signal correctly in your NI-DAQmx program. However, I do not see any NI-FGEN code where you import the signal to be used as an external clock. Have you added this code? I think you would benefit from examining the example program entitled "niFgen_DAQmx_Synchronization_Example.vi". This program shows how to synchronize an NI-DAQmx device and an SMC Arb device. You can find the example by opening the NI Example Finder utility; you can open this utility from LabVIEW by going to the Help menu and selecting Find Examples... Once you have opened the NI Example Finder, you can navigate to this example by selecting the Browse tab and going to Hardware Input and Output>>Modular Instruments>>NI-FGEN (Signal Generators)>>Synchronization. You will notice that this example uses the Export Signals VI rather than the Connect Terminals VI. To help understand the difference between these two, you may want to examine this document.
Matt Anderson
Hardware Services Marketing Manager
National Instruments

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Attachments:
Screenshot-NI-DAQmx Test Panels.png ‏17 KB
NI-NEW_error.txt ‏8 KB
shortsyms.txt ‏973 KB

This is the wrong board for this question, you should re-post here
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I need PCI-6602 work with PCI-6722。6602 shares 6722’s ao/SampleClock as external clock and triggered by 6722’s ao/StartTrigger。The master device is 6722, which refered as Dev1, and the slave device is 6602, which refered as Dev2. A RTSI line is used to connect the two devices correctly.
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//config 6722 analog out task
1、DAQmxCreateTask("NI6672", &hAOTask);
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5、DAQmxCreateTask("NI6602", &hCounterTask);
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7、DAQmxCfgSampClkTiming(hCounterTask, "/Dev1/ao/SampleClock", 1000.0, DAQmx_Val_Rising, DAQmx_Val_ContSamps, 1000);
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I run it on the MAX virtual Device, and the Step 11always returned -89120。
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Hello Shokey,
From looking over your post, it looks like you want to program in C, using simulated instruments, a master/slave design with a PCI-6602 and PCI-6722. The PCI-6722 is the master device and the PCI-6602 is the slave device. In order to implement this with the real cards, you would need a RTSI cable between the 2 cards in order to pass the triggers and the sample clock. Unfortunately with simulated devices you can't implement this so parts of your code won't be able to work exactly like if you had the instrument.
If you did have the instrument, you can implement this by performing the following steps:
Master Device:
1.) Export the ao/SampleClock and ao/StartTrigger to a RTSI Line. (See DAQmx C Reference help for DAQmxExportSignal to export these)
Slave Device:
1.) Set the Sample clock and the trigger to the RTSI.
There is another forum that I think will help you out to implement this correctly. In this forum, the customer was trying to export a trigger through a RTSI and the problem he was experiencing was a broken RTSI cable. His code, he states, works. I hope this helps you with this and if you have any more questions, feel free to post.
Jim St
National Instruments
RF Product Support Engineer

Work with PCI-6052E and PCI-6601 simultaneously

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Hi,
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When you are sourcing an output signal from your DAQ board, the signal is already grounded, it means that it has already a reference. If you measure this output with a measurement device, which has also a ground, the both ground potential are not necessary equal. This difference is the common mode voltage and influences your measurement (offset).
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http://zone.ni.com/devzone/conceptd.nsf/webmain/8D907374C5E867F186256C640059F30C?opendocument
http://digital.ni.com/worldwide/france.nsf/webtechsupp/0E6A8D5999CEE1AF8025683C0056A4B1?OpenDocument&node=163080_f
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Attachments:
Counter_1_Meas Buffered Semi-Period-Continuous_main_lv09.vi ‏34 KB
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i'll appreciate any help including posting a link to a tutorial that helps to understand the signals from the motor drive and the encoder
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Some powerpoint or Pdf tutorial that National instruments provide will help as well.
P.S. i read the manual of the UMI-7774 and the pci7344 manual, but i'm yet not understand what i need to do
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PCI-7344 , UMI-7774 , Motor Drive (Sigma FSP Yaskawa) , Servo Motor (Yaskawa)
Thanks for any help.
Regards,
Moti
Solved!
Go to Solution.

Dear Nate,
Thank you for repling to my posts, i really appreciate that.
The links you provide is very helpfull.
i'm enginner in my education, but not in this area (i'm information systems eng.)
i decided that i need to learn more about it (ni-imaq, ni-motion, line-scan camera, servo, servo drives, encoder signals, motion i/o, umi, pci7344, etc..)
So, i download the manual and help files that is needed to my application i want to build
(high speed machine vision of color line-scan camera connected to motion with rtsi synchronization and also digital i/o)
and now i'm reading ALL this, its huge amount to read, and not all the thing i understand in the begining (english is not my lang..)
Thanks again for the replies.
Best Regards,
Moti

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Hellow!
Sorry for my bad English, I'm from Russia.
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Connecting Yaskawa Sigma II Servo Drive (SGDH) to PCI-7344 and UMI-7774

Hi,
I have NI PCI-7344 and UMI-7774 and i want to
Connect the UMI-7774 to Yaskawa Sigma II Servo Drive (SGDH) , the servo motor drive is connected to the servo motor with original Yaskawa cables.
1.  do you know if National instruments provide special cables to connect the UMI-7774 to the Yaskawa Sigma II Servo Drive (SGDH) ?
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     http://zone.ni.com/devzone/cda/tut/p/id/5908
(you can find in this link that this cable exist: 50 Pin cable for connecting MCA-7790Y to Yaskawa Sigma II Servo Amplifier)
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2. Where can i find a tutorial on how to configure the PCI-7344 in MAX to send simple commands to the Servo Drive
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Moti

Hi MotiM,
We do not have a cable that will let you directly connect the UMI-7774 to a Yaskawa Drive. We do sell cables that will have the Dsub connector to match the UMI-7774 with pigtails to wire to the drive. If you take a look at the product page for the UMI-7774 you can see the different cables listed under the accessories.
To perform a simple move in Measurement and Automation (MAX) is very simple. In MAX under NI-Motion select your PCI-7344. Under this section select the settings option (by default it will be called Default 7340 settings). Select the Servo radio button. Initialize your controller. Then you can select Interactive and 1-D Interactive and command your motor from there. I have attached an image with the important areas highlighted for you.
Message Edited by Adam_H on 09-19-2008 03:41 PM
Adam H
National Instruments
Applications Engineer
Attachments:
MAX.jpg ‏93 KB

Synchronize PCI- 5421 and PCI-6602

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