回复： serial poll

[askguy]

all most all article from internet tell us how to serial poll device, but I want to know how can I check whether my device has been serial polled by controller, it's from device's standpoint instead of controller's standpoint. thanks!

[askguy]

2 weeks pasted, I am still waiting for you!  🙂

[askguy]

I'm still waiting for any answer from you!!! 🙂

[Crazywu]

http://www.ni.com/white-paper/4056/en/

[askguy]

anyway, thank you, Crazywu!

[Minions]

If you want to know if a piece of equipment physically exists, perform an ID query from the controller and match the response it receives from the piece of equipment addressed.  Current standards would have you query the device with

"*IDN?\n"

However, many of the older devices will not respond to that and require the older query of 

"ID?\n"

This will help ensure that the equipment you expect to communicate with is actually there.

[askguy]

Thank you, Minions!

[Minions]

Any response that is helpful, you should click the KUDOS box.  Also, if that is the answer that you wanted, then close out the thread by accepting that answer as the solution.

Thanks and have a nice day.