Hey Pat,
yes the cheap chinese VFD manuals are very lousy. First they are not didactical at all and secondly they are not written by a native writer of the target language, but instead from what the chinese get by auto-translation from chinese. But if you say you set up a Hitachi VFD, you should have read a Hitachi manual which not only is very good (with its e.g. 418 pages for the WJ200 series) and if you look at the Omron MX2’s manual, which is practically identical with the Hitachi WJ200, you get it written in english, czech, german, spanish, french, italian, polish and russian and they are written by native target language writers.
So if you read a
you can deduce a lot of knowledge from it, even if the parameters are called differently in the various VFD brands.