From page 28 of the product manual:
4. If RS-485 communication does not work:
a) Check that the baud rate of the host computer/PLC is the same as Meter.
b) Check that the device ID of the meter are unique and should not replicate.
c) Check all communications wiring is complete.
d) Check that the number of data bits is set to 8, with one stop bit and even
parity.
Also Page 8 tells you where the display value of the device ID
You are not showing your resulting printout, which might be helpful. And it is not clear that you have checked other aspects of your setup, such as match the slave ID to what you have declared in your program.