The first step with multiplexer

Hello everyone,

This is the first time, we will use und multiplexer, we don't know what we can do.  I have a practical training at the University, and we should use multiplexer with labveiw 2012

Description:

-in this project, we have a program, this programm for signal measurement and this programm worked same will. Our role in this project, we will extend this Programm, that we will use multiplexer with 20 entrance and exit.

-We go to conenct 20 devices in a laptop computer to measure the parallel of 20 devices (signals). the time between each Signal on the output side should be of 5 ms.

My question is: what we don first after the connection of devices-20? We should install the driver? What function do stupid to write question? should we write RS232 function "funktion write, read, open serial... etc." or it takes not just with multiplexer? ' " I know, it's a stupid question, but I'm sorry we don't know what we can do, and as I say it is the first practical training.

Thank you very much

Hello

I use a multiplexer to connect several devices to measure the values. I use the multiplexer "USB-ERB-24", so I can measure 24 devices at the same time. I already ordered the multiplexer, but so far it is not getting... So I thought to prepare the software.
My question is, I've programmed the multiplexer blindly and would like you checked my program, if it's just

On the picture you can see that I used "wait" and "timing" funktion release time because should probably be 50 ms... This means that the data is read from a device, and after 50ms must read data from the next connected device... etc? Here, I have not defined a fixed value for the time to release... maybe I have an error and my multiplexer will made to automatically release time because in the Datenscheet stand at the release time which is 50 ms? I don't know if the the mux do this automatically an i donot need to use here "Wait" or function "sync"?

The second part of the program is: I will not use a single multiplexer but two multiplexers. So I can measure 47 instead of 24 aircraft. In the last relay (nr. 24 entries) of the multiplexer1 connect the second multiplexer. for this purpose, it was necessary to extend my program... See image 2 in ULX 'write.vi', I joined to the smallest feature... So it will be tested with data on how many devices are connected, in other words, he checked with the creation of the matrix whose values are True (true value = connected device) and real values will be in a new table added, after generating the new table, it will determine the size of the array (the new table size) If the size of the table = 24 ==> the second mutiplexcer is connected and the waiting time (time releasing = 24 * output wait time). It is true that I have do the extension in "write data"?   Do you think that so far is everything is ok, or not?
Thank you for your help

Tags: NI Software

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