Canbus

Autor VUCIBATINA, Siječanj 16, 2019, 09:57:52

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Bobi

Na engleskom, ali eto, ne da mi se prevodit: zadnji para ti je interesantan:

Not that hard to understand, but you need first to understand that the sockets are not controlled via the "CANBus."

The CANBus (controller area network bus) is first and foremost, a communications protocol. In place of old vehicle systems in which every single component had to have its own dedicated complete set of wiring to perform its function(s) and to interact with any other component (for example, an engine controller may need 20 separate wiring circuits to work individually with 20 other components), someone had the idea of "why not put all of these components on one wire, and use computer chips at each component which permit the components to share the one wire" -- in other words, just like the computer network in your office, every computer hooked to the local area network can listen to the same central loop, and respond to or send messages on the loop when it sees or wants to speak to another component. The protocol is the scheme for organizing who can talk, when, for how long, etc.

CANBus can save a surprising amount of weight in a vehicle, and can enable many new functions, from the trivial (the GPS forwarding Nav satellite time to the bike to update the bike's clock), the convenient (low fuel signal from the bike forwarded to the GPS for the GPS to present a list of the nearest fuel stations) to the quite important (integration of ABS, traction control, stability control and engine controller systems for virtually instantaneous, coordinated response to a stability event).

How does all this relate to the power sockets?

Well, basically, it doesn't.

CANBus is the on-board-inter-component communications system. For actual control of components (for example, in *response* to communications on the CANBus), other electronics can actually supply power or control an actuator. The problem is that most folks misuse the term "CANBus" to refer to the entire electric system on the bike -- that is not itself a problem, but it can lead to confusion.

On previous recent BMWs, many of these "execution" features were controlled by a "Central Function Electronics" unit -- the ZFE. On the K16, the ZFE has been spread across several units, but the basic idea is the same. For several circuits, including the power sockets, the module acts like a "circuit breaker" -- sensing the amount of current flow and shutting off the current if it senses too high a current draw (this is the reason the sockets can't handle a full Gerbings rig -- it thinks there's too much draw (i.e., an "overload") and switches off power supply to the socket. This overcurrent protection is also the reason there are so few fuses on this heavily electronically-laden vehicle -- no need for them if the electronics are capable of cutting off flow.

This module is also programmed to prevent the battery from being drained by a left-on attached accessory by turning off current flow to the socket after a set period after the key is turned off. The $$$ BMW battery charger is "special" because it periodically emits the "secret handshake" -- a digital signal -- up the socket line to tell the control unit to not disconnect the socket from the vehicle so that charging can continue.


VUCIBATINA


:vino: :vino: :vino:


ovako sam i rješija sve, osim što se neko drugi prije mene izj..a oko skidanja rezervara pa je mene konektor dočeka kod volana tako da je sve bija posa od 5min.
neko toga prvih 2 puta mi se navigacija gasila oko 20min nakon isključivanja kontakta a posli oko minute
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jessy

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