HV switching control relay

hi, im working with the DAQ NI USB6259. i want to use DAQ as a switching control for HV relay.my problem is i want to control 2 switch and HV relay. for the 1st 10000s period, switch 1 will ON and after 10000s period,switch 1 OFF and automatically switch 2 ON. can this DAQ model use as a switching control and can i get some example on how to control switch automatically for certain period or any idea to solve my problem.

Your question has nothing to do with NI Switches. It should have been posted to the multifunction DAQ or digital I/O board.
A port of the USB-6009 consists of multiple lines and you can easily write to all lines if you are configured for port access. For example, if you write a binary 001 to the port, you output a 0 on lines 1 and 2 and a 1 on line 0. Writing a binary 100 will write a 1 to line 2 and a 0 to lines 0 and 1. Instead of port mode, you can use line mode and either use one task for all three lines or a separate task for each line.
You have not mentioned which language you are using. If LabVIEW, open the example finder. You will find some simple examples of line and port mode. The DAQ Assistant can also be used. This is a very simple task to code. If you continue to have problems, post the code you've writte. You should also review the information on the DAQmx Getting Started page.
Message Edited by Dennis Knutson on 06-24-2009 09:47 PM

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Set up time for ni 6501 to control relay

Hi,all
I have made great progresses with your help. Right now I know how to control the relay using NI 6501.
Furthermore, I try to set up a time period (after 2 hours) and then let NI 6501 switch on the relay.
What kind of example can I refer to?
Another control is when pressure data is low to 1mtorr, then switch on relay.
If there are some similar examples I can refer to, it will be helpful for me programming
Thanks
Solved!
Go to Solution.

Here is an example of how to control your valves:
This example is not ideal. For example, the Write to Spreadsheet File is called each loop iteration just to write only one value. This is a waste. It would be better to collect all your data into an array (use a wire to loop edge with indexing on), and call the Write function once with an entire array of data. I will leave it up to you to do this. You could use the practice. Another thing is that a lot of local variables are used. Also not ideal.
Also, a state machine architecture would serve this purpose much better. First state would be similar to the first sequence frame. Second state would be like the while loop. And so on... See if you can implement this code in a state machine. One advantage would be to control each stage of the code in an orderly manner. Another advantage would come if you ever had to change the order of execution, or insert code in between states. Just add a new state and/or change the next state pointer. Local variables can be replaced by shift registers in a state machine, leading to the code being easier to read. See if you can do this.
- tbob
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How do I switch a relay then one second later switch it back?

I am currently doing an experiment where I need to send a digital output signal to a relay, the relay switches, then one second later switches back. I have connected the relay to the CB68-LP board and I can get it to manually switch when I click, but I need this to be an automatic response.
I just need to click a switch so the relay changes and 1s later changes back again. Any ideas?

So you already did most of the job !
I suppose that you built some kind of a VI, where you can switch the relay upon switching a boolean control. Let's call it "Relay.vi".
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Build a new VI, with a sequence structure with 4 frames :
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Comparing switch control and switch output and setting switch control accordingly

Hello,
        i am developing a GUI for a system which contains relays to control the motors. For the same purpose i am using switch control on my GUI to control these relays.when these relay are turned ON by the switch control on my GUI, they give back status to the GUI, which i am displaying as a switch status .
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Hello Mike,
                    Thanks for the response!!
As i have described the situation above, in any case if switch control fails to send message to relay due to some hardware fault , in that case relays will be off and the switch on GUI will be ON , and user will think that the relay is ON.Which is false condition.
i tried to use property value(signl)   to give back the status of switch indicator to the switch control.
You can have a look at attached files which i have made as demo.
Now the problem is when i run my GUI for the first time all the switch on the front panel are off by default which creates a conflict to control the switches.
Besides i am unaware of the timing events and how to implement it in my application . It would be great if you could provide some more details about it.
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switch control trial.zip ‏16 KB

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HV switching control relay

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