getting stuck to read data from Ultrasonic Flow meter using modbus

Other Hardware Sensors
1

Hello everyone,

I am using this TUF- 2000 ultrasonic flow meter in my application. And I am referring this (link below) user manual for testing ultrasonic flow meter with Modbus https://images-na.ssl-images-amazon.com/images/I/91CvZHsNYBL.pdf .

I want to read the particular window data. For example I want to read window M25 which is transducer mounting spacing, (for ref page no. 14, MENU M25).
Also I am little bit confused in window functions namely M96, M97, M98, M99. What exactly these windows are for, Please explain these menus in detail.

If there is any Modbus register to read a particular window data then please let me know.

2

M96-98 would only apply if you had a Serial-connected thermal printer. Do you have one of those? It might look a little bit like the receipt printer at your grocery store. If you don't have one, ignore those windows.

The modbus register addresses are given in the table beginning on page 40. Note 2 on that table says...

(2) Other variables are not given here. Call us if you have a need.

It seems like M25 isn't readable (or writeable) through MODBUS. Unless it's hiding under another name.