Newbie help!

I haven't touched refrigeration in a long time and need some quick help.

Basically i have 1800HP of compressors at a facility.
1 -400HP Screw
1 -125HP Screw
2 -600HP Screw
1 -75HP booster
1 -100HP reciprocating

Looking on the HMI screen of one of the screws, it shows the following:
Cap: 98%
Pos Valv:54%
% Vol: 47%

It's running ammonia (R717)

How do I find the percentage the compressor is loaded at?
I should know this, but I haven't touched on it in a few years and quite honestly I don't want to go back to my text books. I know there aren't dumb questions, just dumb people. Guess I fall into the latter.

Mrlee l'm dumb too but can you try to load or unload compressor manually, as this may help narrow it down.

Without knowing type of compressor or control panel makes it a bit hard to interpret.

I'm guessing, but think its 100% loaded with a variable Vi compressor pos valve + vol = approx 100% loaded.

This is a Vilter Single Screw Compressor, Model #: VSS-1201HS.

I wish i could load/unload, but unfortunately the equipment is in a different country.

I'm assuming it's running 100% loaded as well, but just wanted to make sure.

Do you have on line access to control systems.