Quote Originally Posted by mactec54 View Post
No they are correct as per manual and have not changed in the last 10 years

From the manual

PD072 Higher Analog Frequency

PD073 Lower Analog Frequency
Well here is a snip from the manual in the link provided by OP:

Attachment 433522

... which is from about ten years ago. So assuming it has not changed in 10y as you suggest, it still appears you are wrong. What are you going from? do you have a current paper copy?

[EDIT] Well that's cool, I've just tested on the machine , PD072 was set to declared factory default of 50 and , if I set up remote speed setting, it gives 50Hz. Set it to 400 and I get 400Hz (24000rpm) !

So mactec is correct and Huag Yang has it wrong. Maybe it did change in 10y or they realised what the words higher and lower mean and corrected the doc. I don't recall seeing an error when I set up the last one, so presumably the printed manual which I bought with the unit is correct, and this 10y old pdf is wrong.

This is not too surprising with Chinese doc. , I'm sure the guy who wrote it does not understand more English than I can read Chinese. He was just given a job of using Google to translate the manual.