Modbus API

In version Modbus API v1.1, only Modbus over TCP/IP is supported.

Default configuration

Slave address 1
Port 502
Modbus Mode TCP/IP

Data model structure

Data model is separated into adress zone to manage independently the gateway specific information and data for each device:

  • hx0000 to hx00FF are dedicated to the gateway data
  • For each device, a zone hxYY00 to hxYYFF is reserved
  • h prefix information refers to one of the four Modbus register types:

1 for coils (read/write bit data)

2 for discrete inputs (read only bit data)

3 for holding registers (read/write word data)

4 for input registers (read only word data)