Which Ethernet message instruction is used for non-CIP devices?

The instruction that is accurately used for non-CIP devices is represented by sockets. In the context of networking, especially in industrial environments, sockets provide a method for communication between devices that may not adhere to the Common Industrial Protocol (CIP). They are specific endpoint representations in an IP network, allowing for the transmission of data between devices regardless of their communication protocols.

Sockets operate at the transport layer of the internet protocol suite and facilitate the movement of data packets while ensuring that the messages are delivered to the correct application within the receiving device. This is particularly important for non-CIP devices, which may not support standardized industrial communication protocols, making sockets a versatile choice for integrating different types of hardware in industrial networks.

In contrast, while packets, messages, and frames are terms associated with network communication, they do not specifically denote the method used for facilitating communication with non-CIP devices. Packets refer to units of data that are transmitted over a network, messages can represent any form of communication between devices, and frames refer to the data link layer structures that encapsulate packets for transmission. However, none of these terms specifically indicates the endpoint communication mechanism as sockets do.