Capacity ledger entries are created every time you post capacity usage for a production order. They are created in terms of time (Run Time, Stop Time, Setup Time) or quantity (scrap quantity, output quantity).
The Capacity Ledger Entry table only holds information about capacity usage in terms of time or quantity - all amounts are listed in the Value Entry Table.
Capacity Ledger Entries are created by any the following: Posting a Capacity Journal, posting an Output Journal and when flushing a Production Order.
You cannot change the contents of the fields in the Capacity Ledger Entry table because the entries have already been posted.