康明斯柴油發動機ECM串行通信技術

導言

數據通信接口使得設備上的電子裝置彼此相互連接。有些典型功能共享傳感器數據，共享計算信息，允許子系統（如發動機、變速箱等）之間的工作相互影響，子系統工作狀態通信。數據通信接口還可提供機載或非機載診斷工作模式。

Quantum控制器具有兩個獨立的串行通信端口。一個端口用于訪問SAE J1939并與J1939-11兼容，另一個端口用于SAE J1587并與J1708兼容。Quantum控制器不支持SAE J1922。

SAE J1939數據通信裝置是一種高速網絡，用于在250K 波特下工作的設備。它能夠支持控制、信息共享、診斷、多路傳輸和專有通信。J1939（物理層）數據通信采用微分線路驅動器電路，允許最長的總線長度為40米。在給定的時間內，網絡最多可提供30個節點連接。

SAE J1587是在9600波特的速度下工作的J1708基線網絡。它支持信息共享、診斷和專有通信。在給定的時間內，網絡最多可提供20個節點連接。

當設備鑰匙開關轉到ON（接通）位置時，Quantum控制器上的J1939/J1587數據通信接口同時起作用。

適用的SAE文件

本文件與下面列出的SAE技術規范含有提供Quantum通信接口（J1939和J1587）與設備應用類型相連的信息。

SAE 1939		推薦用于串行控制和通信網絡的常例（1997年4月）。它提供一個計劃的J1939-xx文件列表，還提供有關網絡的全套文件和基本操作的簡單指導。
SAE J1939-11		物理層（1997年3月）。在250Kb/秒的速度下工作，線性總線帶有屏蔽雙絞線回路。
SAE J1939-12		物理層（工作草案為ISO 11783 中的第2部分，1997年5月）。在250Kb/秒的速度下工作，線性總線帶有四芯絞線。
SAE J1939-13		非機載診斷連接器（1997年1月），指定9-針Deutsch連接器為J1939, J1587和二級CAN網絡提供工具、無開關電源和接地連接。
SAE J1939-21		數據通信層（1998年7月），指定CAN 2.0b作為使用的信息協議，同時還定義了J1939應用層的接口。
SAE J1939-71		車輛應用層（1996年5月和97年1月的附錄），定義了傳輸參數值解釋規則，允許接收裝置確定發送裝置能否提供與參數據組有關的所有參數，任何參數是否存在錯誤狀態，或信號是否有效。
SAE J1939-73		診斷應用層（1998年10月）- 診斷。定義在J1939布置方案上執行診斷需要的容量，以確定發生故障的子系統最少可維修的特性，如何發生故障，讀取和清除診斷故障代碼，診斷指示燈狀態的通信，以及提供維修工具監測的多種參數。
SAE J1939-81		網絡管理 （1996年11月）
SAE J1587		（1996年3月和97年1月的附錄） - 重型設備應用類型微機系統之間的連接SAE/TMC電子數據交換。定義信息和數據的格式以及用于傳輸頻率和環境信息的指導方針。
SAE J1708		物理層（1993年10月）- 重型設備應用類型微機系統之間的串行數據通信。

適用的康明斯文件

可在下列康明斯技術標準和文件中找到數據通信接口的其他信息：

接口技術規范：1377-9804 - 輸入和輸出的J1939多路傳輸。為通過J1939數據通信接口而不是通過分離的導線（巡航控制開關輸入，指示燈輸出等）提供給發動機或由發動機提供的信息提供信號處理要求。

AEB 15.44 Quantum安裝建議文件

J1939安裝信息

本節提供了在設備上安裝J1939數據通信接口需要的信息。請參考AEB 15.44 - Quantum安裝建議中的詳細信息。

用于QSM11和QSX15的強制性EA（數據通信接口）選裝件

不適用于QSK 19

J1939

為在發動機上安裝J1939數據通信接口，理解電纜布線和連接器的要求是很重要的。下一節提供了電纜布線和連接器的詳細信息。還提供了某些供應商的信息，以便采購電纜和連接器。

3.  電纜布線

主干線束 - 一種最大長度為40米（約131英尺）的線性總線。在給定的時間內可連接至主干網的最大節點數（電子控制器）為30。注意，B和B MATE（配合件）（2按鍵型）是主干線束和終端連接器按鍵，B為插座，B MATE為插頭。

為了與J1939-11一致，主干線束為帶加蔽線的屏蔽雙絞線，并在每個網絡終端都需要被動終端電阻。J1939-11布局典型用于汽車/公路應用類型。請參考圖1。

為了與J1939-12一致，主干線束是帶加蔽線的四芯絞線，并在網絡的每端都需要主動終端和偏置電路。物理層使得J1939-11無須屏蔽。物理層還采用收發機電路設計，允許J1939-11節點在同一網絡中作為J1939-12節點存在。

短線 - 主干線束與每個節點（電子控制器）的連接稱為短線，最長為1米（約3.3英尺）。請參考圖1。

屏蔽 - 電氣連接的屏蔽是通過節點（電子控制器）的總線連接點和主總線的內部連線處的加蔽線來實現的。還應注意屏蔽只能在蓄電池負極的一處接地。盡管屏蔽不能覆蓋線性總線或短線連接器（閱讀下節中的詳細信息）的連接部位，它仍與下段屏蔽電纜建立電氣連接，并提供充分的覆蓋，以提供必要的電磁兼容性（EMC）。

連接

發動機連接 - Quantum控制器可通過稱為短線連接器的3-針未屏蔽連接器與主干線束相連。這在圖1中ECU1連接到主干線束的方法中表示出來。圖1中還表示出短線連接器有一個特殊鍵（1類鍵），在圖中表示為A和A MATE，其中A MATE 是另一半配合件。對于圖1中有關ECU 1所示的連接類型，三根觸針中的一根將用來穿過短線連接器的配合件（A MATE）與加蔽線相連，以便保持屏蔽的電氣導通性。另外兩個SAE J1939支持的連接電子控制器與主干線束的觸針在圖X中顯示出來。應當注意，ECU 2的連接提供最佳的外殼EMC改進（例如最短的短線）。

注：制作主干線束時，OEM必須提供發動機J1939維修接頭。

診斷連接 - 診斷連接器是9針Deutsch連接器，為J1939、二級CAN網絡提供工具（用于農業/工程機械應用類型）、無開關電源和接地連接。來自主干線束的診斷連接器允許的最大距離為2/3米（0.67米）。診斷連接器與連接診斷連接器的工具接口電路之間最大允許的距離為另外的1/3米（0.33米）。

對于汽車/卡車工業，SAE推薦的連接器位置處于駕駛室中的操作員側，并在操作員側接地。對于J1587的6-針連接器安裝，推薦使用Deutsch HD10-6-12P連接器。對于J1939和J1587的9-針連接器安裝，建議使用Deutsch HD10-9-1939P連接器 - 請參考AEB 15.10的4.0節中更為詳細的信息。

穿墻式連接器（Bulkhead Connection） - J1939數據通信接口可穿過OEM穿墻式連接器。為降低電噪聲對數據通信接口的影響，建議不要把導線置于具有極高電流負荷或開關電流的電路附近。建議安裝者在所有繼電器上設計回程二極管，防止出現系統噪音問題。

Quantum模塊支持的信息

本節詳細描述了Quantum控制器支持的J1939和J1587操作規程建議信息。還列出了J1939和J15587上發送的信息的參數特征。

J1939支持的信息

康明斯已經確定了J1939的六類性能。它們是：

傳動系控制（PT） - 傳動系控制類型由發動機與變速箱、ASR和ABS等裝置之間交換的參數據組成。

信息共享（IS） - 這種類型具有與通用發動機運轉相關的參數。這些參數可以傳送，也根據遠程系統的要求提供，如發動機冷卻液溫度、機油壓力等。

診斷（DG） - 這種類型包含用于傳送故障信息的參數，能夠進行指令系統測試，存取測試結果，清除現行和非現行診斷故障代碼，以及將與排放有關的現行診斷故障代碼從其他診斷故障代碼（DTC）中分離出來。

多路傳輸（MX） - 多路傳輸的定義 - J1939多路傳輸是利用J1939數據通信接口代替單獨的硬導線發送或接收輸入和輸出控制指令。多路傳輸參數的啟動是維修調整，可使用VEPS進行調整。多路傳輸參數的源地址也可通過VEPS進行調整。詳細內容請參考輸入和輸出的1377 – 9804 – J1939多路傳輸（接口技術規范）。所有幫助實現多路傳輸的參數均符合這種類型

通用（G）- 未包含在其他5種類型中的所有其他非專用的J1939都分在通用組。示例：應答（ACK/NACK）、傳輸協議。

服務/專用（SP） - 本類型包含可用于傳送專用信息的J1939信息，例如專用于A的PGN。

表1列出了所有Quantum發動機工作臺支持的J1939 PGN和參數。請仔細閱讀下列注釋內容，以便理解表格中的內容。

輔助理解表1的注釋：

欄1 列出了SAE PGN編號。

欄2 列出了SAE定義的PGN名稱。

而且，SA/DA表示源地址/目的地址，并給出了SAE指定的PGN編號列表。例如，PGN 00000-TSC1和變速箱（Trans）（3）/發動機（Engine）（0）的組合應當解釋為源自變速箱（J1939地址3），由發動機接收（J1939地址0）。還要注意，具有J1939地址的任何源地址均可要求PGN。在不是真實地址的地方，規定的地址已經列出。

有些PGN不能在SAE J1939-71和-73中完全定義。它們帶有一個星號上標“*”。有關詳細情況，請參考表結尾的注釋。

欄3 列出了Quantum中的PGN的更新速度。

欄4 指示符合康明斯定義的參數類型。

請注意會有參數屬于多種類型的情況。例如 – “發動機功率下降開關”參數屬于IS/MX。還應閱讀注6。

欄5 列出了PGN內的參數。

欄6-14 描述了Quantum發動機支持的參數。

TX 表示參數從發動機發送， RX 表示發動機接收參數， no 表示不支持的參數。J1939參數支持同時列入TX/RX，表示下列情況：

在非多路傳輸情況下，參數值從發動機傳輸（TX）。

在多路傳輸情況下，發動機接收參數值（RX）。

特定的J1939參數的發送應取決于這些參數的超越調整。這些調整只能在通電之前改變（起作用/不起作用）。超越起作用時，用于這些系統名稱的J1939參數應當通過N/A傳送（112用于開關，FF16用于模擬值。）

注：  多路傳輸 - 如果硬連線仍然連接至ECM用于特定的開關/傳感器，同時參數設置為多路傳輸，則ECU將忽略硬連線輸入。

 

Cummins diesel engine ECM serial communication technology

Quantum serial communication

Applicable to the manufacture of first class equipment OEM, so for them, is most concerned about problems with the installation of data communication interface. Such content provides a cable, connector information and lists the Cummins tested with Quantum controller compatible data communication devices. Second class collects OEM design and Quantum communication interface connected to the controller and used parts supplier information. Such information provides a detailed description and information support, parameters, features, network application and content related to the diagnosis.
Introduction

Data communication interface makes device of electronic devices connected to each other. Some typical features sharing sensor data, shared computing information, allowing subsystems (such as engine, transmission, etc) work interaction between, subsystem status communication. Data communication interface also provides airborne or non-airborne diagnosis mode.

Quantum controller has two independent serial communication ports. One port is used to access the SAE J1939 and compatible with J1939-11, another port is used for SAE J1708 and J1587 and compatible. Quantum controller does not support SAE J1922.

SAE J1939 data communications device is a high-speed network, devices used for work in 250K Porter. It supports controls, information-sharing, diagnosis, multiplexing and proprietary communication. J1939 (physical layer) data communication using differential line driver circuit, allowing for a maximum bus length of 40 meters. Within the given time, the network provides up to 30 node connections.

SAE J1587 is working at 9,600 baud rate baseline of J1708 networks. It supports information sharing, Diagnostics and proprietary communication. Within the given time, the network provides up to 20 nodes are connected.

When the device is switched to the key ON (turn on) position, Quantum J1939/J1587 communication interface on the controller at the same time work.

Applicable SAE files

SAE technical specifications listed below in this document contain provides Quantum communication interfaces (J1939 and J1587) application with the device connected to the type of information.

SAE 1939

Recommended rule for serial control and communications networks (April 1997). J1939-xx providing a list of files, also provide complete sets of documents about the network and basic instructions for simple operation.

SAE J1939-1
hysical layer (March 1997). Work in 250Kb/seconds of speed, a linear bus with a shielded twisted pair loop.

J1939-12

Physical layer (2nd part of the working draft for ISO 11,783, May 1997). Work in 250Kb/seconds of speed, a linear bus with four-core cable.

SAE J1939-13

Non-airborne diagnosis connector (January 1997), specifies a 9-pin Deutsch connector for J1939, J1587 and secondary network CAN provide the tools, no switching power supply and ground connection.

SAE J1939-21

Data communication layers (July 1998), specifies the CAN 2.0b information that is used as the Protocol, while also defining the J1939 interface of the application layer.SAE J1939-71

Vehicle application layer (Appendix to May 1996 and January 97), transmission parameters values defined rules of interpretation, the sending device allows the receiving device to determine availability of all parameters associated with the parameter according to the group, any arguments whether there is an error state, or whether the signal is valid.

SAE J1939-73

Application layer (October 1998)-Diagnostics. Define perform Diagnostics on the J1939 layout scheme is required capacity, to determine the failing subsystem that at least serviceable characteristics, how to fail, read and clear diagnostic fault codes, the communication status of the diagnostic LEDs, as well as providing maintenance tools for monitoring a variety of parameters.

SAE J1939-81

Network management (November 1996)

SAE J1587

(Appendix to March 1996 and January 97)-heavy equipment application type connect SAE/TMC electronic data exchange between computer systems. Defines the format of the information and data, as well as guidelines for the transmission frequency and environmental information.

SAE J1708

Physical layer (October 1993)-heavy equipment application type of serial data communication between computer systems.

Applicable Cummins files

Can be found in the following technical standards for Cummins and file data communication interface for additional information:

Interface specification: 1377-9804-J1939 multiplexing of input and output. J1939 communication interface rather than through separation of conductors (cruise control switch input, light output, and so on) provide information to the engine or engines provide signal processing requirements.

AEB 15.44 Quantum installation recommendations files

J1939 installation information

This section provides information J1939 communication interface required for installation on the device. Please refer to AEB 15.44-Quantum installation recommendations for further information.

Mandatory for QSM11 and QSX15 EA (data communication interface) options

installed on J1939 communication interface, understand the requirement of cabling and connectors are very important. Cabling and connector is provided in the following section for more information. Also provided some supplier information in order to purchase cables and connectors.

3. cable routing

Trunk wiring harness-a maximum length of 40 metres (131 feet) of linear bus. At any given time within the maximum number of nodes that can be connected to the backbone (electronic controller) is 30. Note that b and b MATE (tie) (2 keys) is a trunk wiring harness connector and Terminal press, b for the socket, b MATE for the plug.

Consistent with the J1939-11, main wiring harness for the belt and cover the screened twisted-pair cable, and is required for each network Terminal passive termination resistors. J1939-11 application layout typical for auto/road type. Refer to figure 1.

Consistent with the J1939-12, main wiring harness belt and cover lines four core strands, and requires active terminals and at each side of the network bias circuit. Physical layer makes the J1939-11 without shielding. Physical layer transceiver circuit design, allow J1939-11 nodes on the same network as the J1939-12 node exists.

Short-trunk wiring harness with each node (electronic controller) connections known as short-term, up to 1 meter (3.3 feet). Refer to figure 1.

Shield-shield through the nodes of the electrical connections (electronic controller) bus connection point for internal wiring and shielding and main bus lines to achieve. Attention should also be screened only at the battery negative ground. Although the shield cannot be overwritten or short linear bus connector (read the detailed information in the next section) connecting parts, it is still shielded cables of lower electrical connection is established, and to provide adequate coverage to provide the necessary electromagnetic compatibility (EMC).

Connectio
Engine connection-Quantum controller can be called a short 3-pin connectors are not shielded connector connected to the main wiring harness. In Figure 1 the ECU1 represented wiring harness connected to the backbone. Figure 1 also represents a short connector that has a special key (1 key), represented in the figure as a and a MATE, which combined with a MATE is the other half. About ECU 1 as shown in Figure 1 the type of connection, one of the three roots stylus tie pieces of the root will be used to cross the short connector (a MATE) and connected to the cover line, in order to maintain electrical Continuity of the shield. Two connection to SAE J1939 support electronic controller and stylus trunk wiring harness shown in Figure x. It should be noted that ECU 2 connection provides the best shell EMC improved (for example, the shortest dash).

Note: when making trunk wiring harness, J1939 OEM must provide engine repair joints.

Diagnose connections-diagnostic connector 9-pin Deutsch connectors, providing tools for J1939, CAN network II (for agricultural machinery/engineering application type), no switching power supply and ground connection. Diagnosis from the trunk wiring harness connector allows a maximum distance of two-thirds m (0.67 metres). Diagnostic connector and connect the diagnostic connector instrument interface circuit of maximum allowable distance between one-third metres (0.33 m).

For the car/truck industry, SAE recommended connector locations are in the cab side of the operator, and operator side grounded. 6-pin connectors for J1587 installed, Deutsch HD10-6-12P connector is recommended. 9-pin connector for J1939 and J1587 installation, Deutsch HD10-9-1939P connectors are recommended-please refer to AEB 15.1 per cent of more detailed information in the section.

Wall-connector (Bulkhead Connection)-J1939 data communication interfaces are available through OEM wall-type connectors. To reduce the effects of noise on communication interface, not recommended place has a very high current load wires near or switched-current circuit. Recommended installers design return diode in all relays, prevent system noise problems.

Diagnostics (DG)-this type parameters that contain information used t, o deliver fault, to carry out directives system testing, access to test results, clear the existing and non-existing diagnostic fault codes, and will work with existing diagnostic failure code relating to emissions from the other diagnostic trouble code (DTC) separated.

Multiplex (MX)-definition of multiplexed-J1939 multiplex is the use of J1939 communication interface instead of a separate hard-wires sends or receives input and output control directives. Multiplexing parameters of start is the maintenance, you can use the adjust VEPS. Source address multiplexing parameters can also be adjusted through the VEPS. Details please refer to the inputs and outputs of 1377, multiplex – J1939 (interface specification). All help achieve multiplexing parameters are consistent with this type

Moreover, the SA/DA source/destination addresses, and SAE specifying PGN numbered list. For example, PGN 00000-TSC1 and transmission (Trans) (3)/engine (Engine) (0) combination should be interpreted as derived from the gearbox (J1939 address 3), received by the engine (J1939 address 0). Also note that any source address with J1939 addresses can request a PGN. Is not a real address, where address already listed under.

Send J1939-specific parameters should be adjusted depending on these parameters beyond. These adjustments can only be changed before the power (work/not work). Beyond work, J1939 parameters for the names of these systems should be routed through the N/A (112 for switches, FF16 for analog values. ）