CAN Communication Protocol

CAN Comunicatio Prococol

CAN or CAN Bus, is short for Controller Area Network is a bus serial communications for control applications in real time, with a communication speed of up to 1 Mbit per second, and has excellent detection and fault isolation . That is, this is the best and most current technology in new vehicles. 

This system uses two cables in which two signals traveling exactly the same amplitude and frequency but completely reverse voltage modules in these two pulses identifies the message, but also has options to keep active network but fails one of the communication cables.

Esquema simplificado de un Bus CAN

CAN is a durable and economical network that allows multiple devices to communicate with each other. One benefit is that it allows the electronic control units (ECUs) have a single CAN interface (as pictured), instead of different analog and digital for each device in the system inputs. This reduces the cost and weight in cars.

The main advantage of this protocol is that it allows sharing of a large amount of information between the control units in the system, which causes a significant reduction in both the number of sensors used and the number of cables that make up the electrical system, important topic considering the dimensions that are handled within a car. Thus, significantly increase the functions present in automotive systems where CAN-BUS is used without increasing costs. 

Security systems incorporating the Can-Bus allows the probability of failure in the communication process are very low, but it remains possible that cables, contacts and control units themselves present some dysfunction.