Question : Modbus address range

Hi, i am required to communicate with some modbus devices via tcp, i understand that i need to assign modbus addresses to these devices so i can get my data correctly. I read that the address range is from 400001 to 49999. i am just doing read only communications (i.e getting data from the devices) both analog and digital.

This is what i am doing now.

Generator running status - 400101
Engine speed - 400102
Common Fault - 400103

thanks

Answer : Modbus address range

> no ans to my question

Well, you didn't really ask a question.

You indicated you wanted to assign modbus addresses to some discrete devices, but that's not necessary.

Their inputs were already appearing in those 3 registers. They were technically assigned addresses as soon as they were wired to the programmable controller's input cards, and to access their data all you needed were those register addresses.