The title suggests a comprehensive guide aimed at explaining how to establish a connection between vNode, a software platform, and a Modbus Programmable Logic Controller (PLC) for the purpose of extracting data and monitoring various registers within the PLC.
The first step in this process involves creating a new module in vNode, specifically using the ModbusClient module. This module will allow us to establish communication with the Modbus PLC to exchange data.
Once we have created the module, we proceed to its configuration. Here, the main task is to establish an appropriate communication channel. In this channel, we will configure the necessary parameters for the connection, such as the IP address and port number of the Modbus PLC we want to connect to. These details are essential to ensure a stable and effective connection.
After configuring the communication channel, it is important to create a new device in vNode. In this step, we specify the slave address of the Modbus PLC. This slave address uniquely identifies the device within the Modbus network and is crucial for establishing correct communication between vNode and the PLC.
It is crucial to emphasize that once we have made all the necessary configurations, it is important to save the configuration properly. This will ensure that the settings made are properly preserved and available for later use.
Last but not least, we come to the process of mapping Modbus addresses to tags within vNode. This step allows us to assign specific addresses from the PLC to tags within vNode, making it easier to read and write data between the two systems. By creating new tags in vNode and assigning them the corresponding Modbus addresses, we can easily access PLC data and use it in our applications or processes. 
Created by JF Solano
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