Question

Where in the user’s manual is the address for communicating with Modbus/RTU?

Answer

When communicating with Modbus/RTU, the communication address for each parameter in “Chapter 8.3 Parameter descriptions” of the user’s manual corresponds to the address.
This value is hexadecimal, so convert it to decimal and add 400001 to get the holding register number.

Example

P1.000: External pulse input type
Communication address: 0100H -> 256+400001 -> Holding register: 400257