MODBUS

Modbus is a widely used communications protocol and set of standards that enables communication between industrial and automation equipment, particularly in the field of industrial control systems (ICS) and supervisory control and data acquisition (SCADA) systems. It was developed in the late 1970s and has since become an industry-standard protocol for facilitating communication between various electronic devices and systems in industrial settings.Key characteristics and components of Modbus include, Serial and Ethernet Communication, Client-Server Architecture, Data Types, Communication Modes, Master-Slave Relationship, Read and Write Operations, Open Protocol
Modbus is used in a variety of industrial applications, including manufacturing, energy, utilities, building automation, and process control. Its simplicity, reliability, and widespread adoption have contributed to its enduring popularity in the industrial and automation sectors.

Mathematically, mg/m³ is defined as:

1 mg/m3 = 1mg/1m3

In other words, 1 mg/m³ represents one milligram of the substance in every cubic meter of the medium. This unit is commonly used in air quality monitoring and environmental science to measure the concentration of airborne pollutants, chemicals, or particulate matter. It provides a means to quantify the presence of substances in the air at mass concentrations that can have health or environmental implications.