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Figure 2 shows a PLC scanning a network of industrial devices communicating over DeviceNet.įigure 2. At the lowest level, we find CAN working its magic within the DeviceNet protocol. Rather than connecting each device to a separate input/output on a PLC's I/O modules, devices can be linked together via a four-wire connector and connected to a network scanner on the PLC. It greatly reduces the wiring needed between a control system and I/O devices. At the lowest level, this data is transmitted via a signaling protocol, which in most cases is CAN.ĭeviceNet is a high-level networking protocol used in industrial applications. When the “check engine” light comes on, a technician will often use a handheld device to read the engine codes off of the vehicle. Onboard diagnostics (OBD) is your vehicle's diagnostic and reporting system that allows you or a technician to troubleshoot problems via diagnostic trouble codes (DTCs). Image used courtesy of the Infosec Institute. CAN is used for ECU communication in cars. Figure 1 shows the ECUs in a car connected to a CAN bus.įigure 1. In particular, CAN was developed to reduce cable wiring, so the separate electronic control units (ECUs) inside a vehicle could communicate with only a single pair of wires. Originally invented by Bosch and later codified into the ISO11898-1 standard, CAN defines the data link and physical layer of the Open Systems Interconnection (OSI) model, providing a low-level networking solution for high-speed in-vehicle communications.
#Meaning of sylo serial
The Controller Area Network (CAN) is a serial communication bus designed for robust and flexible performance in harsh environments, and particularly for industrial and automotive applications.
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