two dc power supply precisely timed switching

[jetfire · Accepted solution]

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@JÞB wrote:

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@Dennis_Knutson wrote:

The on/off is part of the Configure Output function with the Enable input. There is going to be some lag between enabling the supplies because the commands will execute sequentially. It might be possible to set them both to software triggering and then issue a GET (Group Execute Trigger) bus command. That would be as close to switching them on at the same time as you are going to get. It has been a while since I've done this. I know the lower level GPIB functions has the TriggerList function for doing this but I'm not sure about VISA.

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A hardware switching solution does make more sense here since you seem to desire deterministic timing.  Windows is not going to get you reliable switch timing.

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thanks,but  i have no  available hardware switch like relay controller

 

[JÞB]

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@jetfire wrote:

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@JÞB wrote:

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@Dennis_Knutson wrote:

The on/off is part of the Configure Output function with the Enable input. There is going to be some lag between enabling the supplies because the commands will execute sequentially. It might be possible to set them both to software triggering and then issue a GET (Group Execute Trigger) bus command. That would be as close to switching them on at the same time as you are going to get. It has been a while since I've done this. I know the lower level GPIB functions has the TriggerList function for doing this but I'm not sure about VISA.

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A hardware switching solution does make more sense here since you seem to desire deterministic timing.  Windows is not going to get you reliable switch timing.

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thanks,but  i have no  available hardware switch like relay controller

 

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Then you probably cannot do this without new hardware.  LabVIEW is great but it cannot replace a relay

[Dennis_Knutson]

It is probably silly discussing options unless you can precisely define what the timing requirments actually are. You have been asked this several times and you have not answered. Is is ms, us, ns? What? The software triggering of both at the same time may in fact be fast enough but how can anyone here know?

[jetfire]

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@Dennis_Knutson wrote:

It is probably silly discussing options unless you can precisely define what the timing requirments actually are. You have been asked this several times and you have not answered. Is is ms, us, ns? What? The software triggering of both at the same time may in fact be fast enough but how can anyone here know?

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sorry,it is my mistake to forget  timing requirments,i hope switching period is by  array controller setup in seconds

ller