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1 2 Lazienda 3 Logo della società CAN bus controller.

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Presentazione sul tema: "1 2 Lazienda 3 Logo della società CAN bus controller."— Transcript della presentazione:


2 1

3 2 Lazienda

4 3 Logo della società CAN bus controller

5 4 Dati CAN Bus Vano : CS, CD,CZ (reed di posizione); Finecorsa salita / discesa; Finecorsa apertura / chiusura porta cabina; Pulsante apertura / chiusura porta, fotocellua, costola mobile; Comandi operatore porte; Bottoniera di manutenzione; Manovra pompieri, priorità, indipendente, attendente; Luce e ventilatore cabina; sovraccarico; posizione cabina; direzione cabina; Chiamate di cabina; Chiamate di piano; Emergenza; Gong; Fuori servizio.

6 5 Anello autostradale su cui vengono immesse e prelevate le informazioni generate o richieste dalle periferiche.

7 6 Dati prelevati dal Can Bus: Reed posizione cabina; Finecorsa salita e discesa; Finecorsa apertura e chiusura operatore porte; Fotocellula e costola mobile; Manutenzione; Manovra pompieri, priorità, indipendente, attendente, etc.; Sovraccarico; Chiamate di piano e cabina. SCHEDA QUADRO

8 7 SCHEDA DI CABINA Dati prelevati dal Can Bus : Comando relè apertura e chiusura porte con regolazione motore; Luce e ventilatore cabina; Segnalazione sovraccarico; Posizione Cabina; Direzione cabina; Gong; Segnalazione allarme L13.

9 8 SCHEDA DI PIANO Dati prelevati dal Can Bus : Gong; Posizione cabina; Direzione cabina; Chiave pompieri; Fuori Servizio; Allarme.

10 9 Scheda principale di quadro Scheda cabina Scheda di piano & display Kit completo sistema Fasi Chiamate cabina

11 10 Principle Data messages transmitted from any node on a CAN bus do not contain addresses of either the transmitting node, or of any intended receiving node. Instead, the content of the message is labelled by an identifier that is unique throughout the network. All other nodes on the network receive the message and each perform an acceptance test on the identifier to determine if the message, and thus its content, is relevant to that particular node. If the message is relevant, it will be processed; otherwise it is ignored. This mode of operation is known as multi-cast. Identifiers The unique identifier also determine the priority of the message. The lower the numerical value of the identifier, the higher the priority. This allow arbitration if two (or more) nodes compete for access to the bus at the same time. The higher priority message is guaranteed to gain the bus access as if it were the only message being transmitted. Lower priority messages are automatically re-transmitted in the next bus cycle, or in a subsequent bus cycle if there are still other, higher priority messages to be sent. Robustness CAN uses Non Return to Zero (NRZ) encoding with bit-stuffing for data communication on a differential two wire bus. The use of NRZ ensures compact messages with a minimum number of transitions; bit- stuffing ensures a sufficient number of edges to guarantee synchronisation. Come funziona il Can Bus

12 11 The two wire bus is usually a shielded or unshielded twisted pair. Flat pair (telephone type) cable also performs well but generates more noise itself, and is more susceptible to external sources of noise (EMC). CAN will operate in extremely harsh environments and the extensive error checking mechanism ensure that any transmission errors are detected. Error Detection Capabilities Error detection on CAN is extremely thorough. Global errors which occur at al nodes are 100% detectable. For local errors (i.e. errors which may appear at only some nodes) the CRC check alone has the following error detection capabilities: Up to 5 single bit errors are 100% detectable, even if the errors are distributed randomly within the code word. All single bit errors are detected if their total number within the code word is odd. The residual (undetected) error probability of the CRC check alone is 3 x 10 to the power –5. In conjunction with all the other error check mechanisms, a more realistic value is 10 to the power of –13. In simple terms: it has been calculated that on a network operating at 1 megabits per second, at an average bus capacity utilisation of 50%, with an average message length of 80 bits, and running for 8 hours a day, 365 days a year; one undetected error will occur every one thousand years. The same error is, statistically, unlikely to occur on a subsequent data transmission.

13 12 Principle In any system, some parameters will change more rapidly than others. For example, parameters that change quickly could be the RPM of a car engine, or the current floor level of a lift. Slower changing parameters may be the temperature of a car engine, or the air temperature in the lift. It is likely that the more rapidly changing parameters need to be transmitted more frequently and, therefore, must be given a higher priority. To cater for real time data communication, this require not only a fast data transmission rate, but also a rapid bus allocation mechanism to deal with occasions when more than one node may be trying to transmit at the same time. To determine the priority of the messages, CAN uses the established method known as Carrier Sense, Multiple Access with Collision Detect (CSMA/CD) but with the enhanced capability of non-destructive bit wise arbitration to provide collision resolution, and to deliver maximum use of the available capacity of the bus. Non-Destructive Bit Wise Arbitration The priority of a CAN message is determined by the binary value of its identifier. The numerical value of each message identifier (and thus the priority of the message) is assigned during the initial phase of the design. The identifier with the lowest numerical value has the highest priority. Any potential bus conflicts are resolved by bit wise arbitration in accordance with the wired-and mechanism, by which a dominant state (logic 0) overwrites a recessive state (logic 1). Sistema didentificazione errori

14 13 Network Size The number of nodes that can exist on a single network is, theoretically, unlimited. However, the drive capabilities of currently available devices imposes some restrictions. Depending on the device types, up to 32 or 64 nodes per network is normal, but is understood that at least one manufacturer is developing devices that will allow networks of 110 nodes, or more. Data Rates The rate of data transmission depends on the total overall length of the bus. Far all ISO11898 compliant devices the 1 Mbit/sec speed is guaranteed for bus length of up to 40 Metres. For longer bus lengths, the recommendations are: Kbit/sec at 100 metres, Kbit/sec at 200 metres, against 9600 bit/sec of a tipical RS Kbit/sec at 400 metres. Rete Can Bus

15 14 Ingressi e uscite scheda quadro Alimentazione 24V Ingresso programmatore RS 232 Ingressi scheda Comando contattori Comandi ausiliari Controllo catena delle sicurezze Temperatura olio / motore Sovraccarico Display LCD parametri e diagnostica Pulsanti Manutenzione CAN BUS Uscite scheda Relè di fase Controllo contattori

16 15 Ingressi e uscite scheda Cabina Sintesi vocale Manutenzione Espansione chiamate Reed CS, CD e CZ Uscita display Uscita sovraccarico & sovraccarico Ventilatore & luce cabina Relè apri / chiudi porta Finecorsa operatore Comando apertura Comando chiusura Ingresso fotocellula Sovraccarico CAN Bus 2 CAN Bus 1 Alimentazione +24VCC Ingresso encoder Ingresso programmatore RS 232

17 16 Ingressi e uscite scheda di piano completa Pulsanti Salita / discesa Prossima direzione Uscita ausiliaria Uscita allarme Ingresso programmatore Indirizzo scheda N° piano CAN Bus Aliment. 24V IN/OUT Connettore display Gong salita e discesa CAN Bus Aliment. 24V IN/OUT Ingressi Ausiliari

18 17 Ingressi e uscite scheda di piano ridotta (chiamata / L13) Pulsante Salita/ Luminosa allarme Ingresso programmatore Pulsante Discesa / Chiamata CAN Bus Aliment. 24V IN/OUT CAN Bus Aliment. 24V IN/OUT Indirizzo scheda N° piano Connettore display

19 18 Display a segmenti Indicatore 7 segmenti con freccia di direzione

20 19 Display Dot matrix 8 x 8 20 mm Dot matrix 16 x mm Dot matrix 8 x mm Dot matrix 8 x mm 7 segmenti 2 digit 30 mm 7 segmenti 1 digit 30 mm

21 20 Bottoniere modulari

22 21 Bottoniere Standard

23 22 Pulsanti Dimensioni (mm) ABCDEF Varies3 Materiali plalam / acciaio scotch/brite. Simboli: 1÷32; B, G, Apertura & Chiusura, Salita & Discesa, Allarme, Stop, Telefono.

24 23 Schema montaggio pulsante

25 24 Installazione sistemi standard

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29 28 Sistema CAN Bus + Money saving

30 29 Plug & Play!+ + = Pulsante di piano

31 30 Plug & Play! Display di piano+ + =

32 31 Collegamento schede di piano

33 32 Morsettiera tetto cabina X Connessioni cabina Plug & Play!

34 33 Finecorsa & reed Plug & Play! Connessioni cabina

35 34 Plug & Play! Connessioni cabina Bottoniera di manutenzione

36 35 Connessioni cabina Plug & Play! Pulsanti & luminose

37 36 Periferica di cabina Periferica di Cabina : Rifasatori piani estremi Reed di salita e discesa; reed zona porte; Operatore porte; Fotocellula; Gong; Sistema di pesatura.

38 37 Risultato finale Plug & Play! Semplice !!!!!

39 38 Programmazione schede + + Plug & Play!

40 39 Plug & Play! Software + 1 click E Fatto !!!!

41 40 Schemi elettrici

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49 48 Collaudo…. …. e verifica schede

50 49 Ricerca guasti Diagnostica Semplificata Protezioni hardware sulla scheda Assistenza Microtelco

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