nxmodbus 0.4.0

1. Package installation

$ pip install nxmodbus

2. Hardware installation

• Connect your Next installation through a Next gateway (e.g. nx-interface) to your controller (personal computer, Raspberry Pi, etc.)

  • (RTU) using a USB to RS-485 adapter.

  • (TCP) using the Ethernet interface connecting to your local area network.

3. Serial configuration

This package rely on pyserial standard package, in order to use the nxmodbus package make sure to instantiate it like :

import serial

serial_port = serial.Serial(SERIAL_PORT_NAME, SERIAL_PORT_BAUDRATE, parity=serial.PARITY_EVEN, timeout=1)

• where SERIAL_PORT_NAME is your serial port interface, for example set it to ‘COM4’ (string argument) when using Windows otherwise you may set it to ‘/dev/ttyUSB0/’ on Linux

• where SERIAL_PORT_BAUDRATE is the baudrate used by your serial port interface (use the Nx-interface to set the serial parameter of the server)

4. Run an example from /examples folder

Go to /examples folder with a terminal and execute this script

$ python ex_rtu_read_param.py
$ python ex_tcp_read_param.py

Check client_rtu file or client_tcp file to understand it.

5. Open documentation

Open documentation from Read The Docs