What is software use to upload and download DC drive 591P parameter ?
The 591P is part of the 590+ family. As such, it uses DSE Lite. We have a Knowledge Base article that provides links to the software and extract/install procedure. The article also has cable information. You can find it here.
I encourage you to read the article because it also covers special cases. For instance, if your drive has a LINK fiber optic or LINKnet ethernet card installed, you will need a different software package. The article lists these software packages as well.
If you need to purchase a programming cable, email your address information to firstname.lastname@example.org. If you are in the US, we can put you in touch with a territory manager. If you are outside the US, we will locate your nearest sales channel. Please note that the "Where To Buy" button on the 590+ product page is also a good way to locate a sales channel near you.