Error -200587 - "Count Edges (DAQ-STC)" - "Generate Pulse Train (DAQ-STC)" and DAQmx Read in one VI

[jolly jumper]

hello,

I'm using the example "Count Edges (DAQ-STC).vi" in combination with "Generate Pulse Train (DAQ-STC)". You will get the settings of source and gate from the picture bellow. (count edges at the bottom .... generate pulse train at the top).

I have also extended my VI by using DAQmx Read and DAQmx Write to get information about the end switches on the axes.

Do the pulse generation and edge counter some kind of locking the lines that I try to read and write? 

Kind regards, peter

[Honsel]

Hi!

Can you please make a screenshot of the error? In Addition please make a screenshot of your vi, so I can see the settings.

Thanks,
Hendrik

[jolly jumper]

Hello honsel,

thank you for your reply. I have tried to add an attachment when I posted that question, but .... it didn't work.

How can I do this?

I entered the path of the vi but I can't find a button "add" or "upload".

kind regards peter

ps: I'm very sorry for asking the most stupied question ever 🙂

[jolly jumper]

ah.... you don't need to "add" or "upload" .... yeah it works!

kind regards peter

[Honsel]

Hi!

Please look at the link:

http://forums.ni.com/ni/board/message?board.id=250&message.id=23536

Best regards,
Hendrik

[jolly jumper]

Hello Hendrik,

I'm sorry, but I don't know what you mean. It just links to my first post.......

kind regards peter

[Honsel]

Hey Peter,

sorry that was my mistake, here the correct link:

http://forums.ni.com/ni/board/message?board.id=250&message.id=20597&requireLogin=False

Best regards,
Hendrik

[jolly jumper]

Hey Henrik,

this was very helpful!!! Thank you.

But I can't let you go :).... Now I must ask you how I can solve the problem:

I want to create a continuous pulse train on the counter output and at the same time I want to count the pulses. This would work in my vi but if my device (a plotter) reaches the end switches, it has to stop. And the only way I'm able to get the state of the switches is to use DAQmx Read, isn't it?

kind regards peter

[Honsel]

Hey Peter,

there are example vis, how to create a train pulse in the Example Finder. In addition there are examples of counting edges. You have to do that with two counters. The first generates the pulse and the second counts the edges. You have to connect the Counter 0 Out to the Counter 1 Source.

Do you want to stop the measurement with a trigger? Can you explain that in detail?

Best regards,
Hendrik

[jolly jumper]

Hello Hendrik,

I used the examples "Write/Read 1 Pt to Dig Line (E).vi" and it works simultanously :).

It's also possible for the second counter to use "Misc" - > "other counter TC" ... and the counter will use the frequency from the first.

But now I've another problem:

I want to change the state of 1 digital line... I also know how, but when I use the counter at the same time, the state of the line is true 😕 Maybe the state changes, because the counter uses the whole port??

kind regards peter 

ps:

I attached an image of the counter settings and the whole VI