How do I see the live weight and the IT values with the HI 1756WS?

You can find the live weight data in the local input for the module, explained on Page 4-6 of the HI 1756WS manual. This data is available all the time.

To get the Integrated Technician values you need to do the "WEIGHSYSTEST". This is command number 6D hex and uses the "ITECHTEST" data structure (refer to page 4-16 in the HI 1756WS manual). This is a timed out command (refer to page 4-21) and the data you received will be from the previous time you ran it. Therefore, you would want to run it twice to get current data.

NOTE:  While running the Integrated Technician test, the live weight data will not be valid.