Netronix devices (modules) have an implemented serial data transmission protocol. Data exchange is carried out by sending a command frame to the device and after the device executes the given order, it receives a response frame from it. In both frames there is a parameter field, through which data is transferred between devices. In the response frame, there is additionally and always a byte operation_code by means of which a message is sent to the device sending the order about the correct execution of the given order.

In the simplest mode of operation, the modules themselves send a response frame in the event of a defined event in a given module.