[2010] Duplex Schedule Parameter Relationships (OPEN)

[mjdanowski]

It would be nice if I could make a "duplex" relationship between two parameters in a schedule.

For example:

I have parameters for KVA load and I have parameters for full load current draw. They are related by the formula of FLA = KVA / sqrt(<PHASE>) / Voltage.

Given voltage and phase, I can calculate FLA from kVA and kVA from FLA, however I cannot make a relationship between the two.

This is important because many times we will input equipment in amps, but need it to output to the circuit as kVA. It would be a big help if we could input either amps or kVA for a piece of equipment, and then have it automatically calculate the other related parameter based upon it.

I input kVA, it calculates amps
I input amps, it calculates kVA.

[cporter.207875]

Is it Revit's inability to have a "circular chain of references" between parameters that you are talking about?

[cporter.207875]

You can basically do this if you set-up dummy parameters to drive your formulas. Then you input the value into the dummy parameter to get the values the real parameters.

[mjdanowski]

You can basically do this if you set-up dummy parameters to drive your formulas. Then you input the value into the dummy parameter to get the values the real parameters.

It gets real complicated though, and it would be real nice if we could just make the relationship outright.

[cporter.207875]

Agreed. . .