please follow the forum how to and post your code in code tags.
It is described here:
You can edit your first post and put the code in code tags.
Error Code 226 (in hex 0xE2) means the device is not responding - you might have a wrong connection.
provide following missing information:
- upload a schematic so we can see how you want to connected your components
- upload pictures so we can see what you have connected in reality
- link to the datasheet of the "MT4W" so we can check the supported modbus functions and addresses