field calculator in arcmap

[essoutiimane]

Hello!

I'm creating a model using Model Builder, and I've encountered a problem. I want to use the Field Calculator to compute the PGA value for each point in the input table, but the equation includes two double parameters. When I try to connect the double variables to the Field Calculator, I can only connect them as an environment setting or a precondition. Even after selecting them as preconditions, I can't find them when writing the expression in the Field Calculator.

Any advice or suggestions would be greatly appreciated!

Thanks!

[essoutiimane]

here is a picture from the model

[SaharZia]

See the link below:  https://support.esri.com/en-us/knowledge-base/how-to-concatenate-fields-in-a-table-in-arcgis-pro-000...

[essoutiimane]

Hello! Thank you for your response.I've reviewed the link you provided, but unfortunately, it didn't resolve my issue.. I've already created the fields, but I'm encountering an issue connecting the model's input parameters to the equation expression within the tool's calculate field feature.