Model parameters in DC operating point analysis (Multisim)

[yostsa]

I have a simple series circuit with a DC power source, resistor and LED. I'm trying to add the diode current to the list of device parameters to report in a operating point analysis, but when I select this parameter, it does not show up in the list of parameters. (I realize that I can get the current by viewing the current flowing into the power source, but still, why isn't this diode current available to view directly?)

Thanks!

sy

[yostsa]

By the way, I've attached the file here...

[lacy]

From what I am seeing is that Multisim is not allowing the parameters of the LED to be added to the list due to the fact that it is either a virtual component or an interactive component. I tried replacing the LED with a diode from the database and it allowed me to access the diode current through the Device Parameters option at the bottom of the dialog box and add this as variable in the list.

Interactive components are different than standard components due to the fact that their models are written in what appears to be C language. So this may be what is causing this. The standard diode model I substituted is written in standard Spice format and that is why it worked.

This is my theory and I could be wrong, but this is the way I see it.

[yostsa]

Thanks, Lacy...I'll check into that...

[OStep · Accepted solution]

yostsa,

The LED component's SPICE model is contained inside a .subckt. 

.subcircuit variables and model parameters are not displayed by default. You must click the "Filter Unselected Variables.." button below the variables list and check "Display submodules" in order display the diode current in your case. 

[lacy]

Thanks, Max. I did not see that option. That is very good information to know. Very much appreciated.

[yostsa]

Hey, thanks for the answer...works great!