Some posts ago I asked you that question:
There are multiple libraries out there that include a SimpleModbusMaster.h file. Don't waste our time and provide a link to the version you're using!
and you still didn't answer it.
And I detail my last question:
Where in your sketch did you specify the address of the energy meter?
That question depends very much on the answer to the first question of this post so please answer both this time.