N4DAC02 FAQ

I can connect the modbus poll to Rs485, but I use it. The modbus poll can be linked to blind.

I don't remember slave ID.

Previously, the defult value was slave id = 1.

Do you have a way to determine if this board, slave id, is a number?

The problem encountered was time out error because the slave id was not selected correctly

I want to know how to search, check, and determine the current current board is the slave id.

I randomly selected slave ID from 1-255 still can't connect.

Answer

1 Please check that the baud rate is 9600 N 8 1

2 This could be due to an incorrect RS485 address or baud rate.

Send the command "FF 03 00 0E 00 01 F0 17" at a baud rate of "1200 2400 4800 9600 19200" to read the RS485 address. When data is returned, note the RS485 address and baud rate.