Parameters - Multiple inputs for one layer

[Rick_O_Hara]

HI there,

I'm trying to create a model that takes inputs for Z values to be used in an IDW tool. There are 13 points with elevations to create a small surface, in this case to help determine PSI. I need for the user to be able to manually put in Z values. I do not know how to let the user provide multiple inputs for the same layer.

So there is a point layer with gauges and their pressures and elevations. If those pressures are not accurate the user will need to update some or all of them to run a more accurate model. I have not been able to figure out how to set up this parameter. IDW wants a z value, so the parameter only seems to accept an input field. If I pull all of the points apart to make several individual layers, I still don't see how to provide the inputs. 

Any help would be appreciated. Please and thanks.

[Rick_O_Hara]

I have tried calling an expression with calculate field. I am not able to get it to work, nor am I able to change the expression after it runs and fails. If I use a variable, I gather I am supposed to use a string and then call it a float. This doesn't work for me either. This seems like it should be a straight forward thing to do. Does anyone know how to do this?

[Rick_O_Hara]

I have tried using a parameter for Iterate Row and for Iterate Field. This seems to be a fairly simple task, but I'm not making it anywhere, and I'm failing to get much useful input through training videos.

Please and thanks.

[Rick_O_Hara]

I can't see that any configuration of this works eithe

r.