What is this red dot? How can i solve it?

[rinpocse91]

Hi,

I can not run it, because there are red dots. I know, it means the signal from DAQ  and the constans 500 are not same type, but i have to Multiply the analog voltage signal from daq. How can I solve it, how can i multiply the analog signal from daq (20mV) with 500? Or is there any option to convert them?

Thanks

[BowenM]

The "red dot" is called a Coercion Dot.  As for how to fix it, by the look of your program you are wanting to acquire 1 sample at a time.  Configure your DAQ Assistant accordingly.  (And then stop using DAQ assistant completely - right click on and generate daqMX code... but that is a separate issue)

[altenbach]

You actually have three coercion dots (at the multiply, at the PID function. and at the rightmost DAQ function).

There is nothing to "solve" because the code works correctly, right? A coercion dot does not break code. Just ignore it.

[rinpocse91]

Thanks, but does not work. this is the message:

[altenbach]

How is the express VI on the right configured? (Impossible to tell from the picture!)

[rinpocse91]

I did it, thanks.

But there is an other problem. I dont know how can i set up the bridge in daq. the load cell: 10 V supply voltage, 2mv/V sensitivity, 

So if the load cell receive maximum force, then it provide 20mv signal. But the output signal is not in range  0 - 0,002 V. The signal is 0-24 something...

What is the problem?

Thanks

[BowenM]

The error is being generated by your DAQmx write, not read.  How is your "DAQ Assistant 2" configured?

[crossrulz]

I would be best if you just posted your VI.  That way we can look at all of your configurations and diagnose your problem.

[rinpocse91]

I attached. So i don not undersant why show the indicator these values, if i set up  the bridge,

[crossrulz]

I would change your DAQ Assistant 1 to be continuous samples, 1 sample per second.  Then change the dynamic data type to a scaler numeric.  Part of your problem is that you are taking 25,000 samples, but only using 1.