@BB49 of course, 15 minutes per 500g. Take it out of the fridge 2 hours beforehand although I have forgotten to do that and it is still fine. I put the trivet in the bottom, 2 cups of water because I have the biggest one which I think is 8 quart pot. I press Saute to heat the pot, once the water is bubbling, cancel, add the joint, manual setting, high pressure should light up and however many minutes.
I do natural release so around 45 minutes, I just let it sit until I am ready to slice and glaze it for the oven. Internal temp of at least 63c which I always check but we have been doing it for years, not just at Christmas either.
I love my IP for this reason. Same when I do a roast chicken dinner, we all have chicken breast as we are 4 adults so I take frozen chicken breasts from the freezer, put 2 cups boiling water into the IP, add some salt and pepper add frozen chicken breasts and swirl the pot so they all get wet and set it to manual for 25 minutes. In all I allow 1 hour to heat, cook, and sit. It is ready at 25 minutes and you can manual release but again I let it sit until I am about to dish up everything and I just slice up the chicken breast and add it to the plates. Also good for adding to pasta, into stir fries and sandwiches.