modbus

Requirements

Powershell

Based on modpoll : https://www.modbusdriver.com/modpoll.html

Installation

You might need to authorize powershell scripts for your session :

Open a powershell Terminal Run the following command :

PowerShell -ExecutionPolicy Bypass

Usage

Go to the code root folder

run :

.\bmodbus.ps1

Configuration

Edit the file bmodbus.ps1 to change the baudrate / Parity / Slave address ...

Batch files

Create Batch files in the \commands folder :

Read Command :

r, <REGISTER_TYPE>, <REGISTER_ADDRESS_START>, <NUMBER_OF_REGISTER_TO_READ>

Write Command :

w, <REGISTER_TYPE>, <REGISTER_ADDRESS>, <VALUE>

Sleep Command :

s, <SECONDS>

With :

REGISTER_TYPE <int>=
    1: COILS
    2: DISCRETE INPUT REGISTERS
    3: HOLDING REGISTERS
    4: INPUT REGISTERS

VALUE <int> =
    Int value to write

REGISTER_START_ADRESS <int> =
    Integer value for the register address

NUMBER_OF_REGISTER_TO_READ <int> =
    Int value, 1 to read a single register

Example :

# Write holding register 1 with value 10
w, 3, 1, 10
# Sleeps for 10 seconds
s, 10
# Read Input registers 1 to 4
r, 4, 1 , 4