康明斯柴油发动机ECM串行通信技术

导言

数据通信接口使得设备上的电子装置彼此相互连接。有些典型功能共享传感器数据，共享计算信息，允许子系统（如发动机、变速箱等）之间的工作相互影响，子系统工作状态通信。数据通信接口还可提供机载或非机载诊断工作模式。

Quantum控制器具有两个独立的串行通信端口。一个端口用于访问SAE J1939并与J1939-11兼容，另一个端口用于SAE J1587并与J1708兼容。Quantum控制器不支持SAE J1922。

SAE J1939数据通信装置是一种高速网络，用于在250K 波特下工作的设备。它能够支持控制、信息共享、诊断、多路传输和专有通信。J1939（物理层）数据通信采用微分线路驱动器电路，允许最长的总线长度为40米。在给定的时间内，网络最多可提供30个节点连接。

SAE J1587是在9600波特的速度下工作的J1708基线网络。它支持信息共享、诊断和专有通信。在给定的时间内，网络最多可提供20个节点连接。

当设备钥匙开关转到ON（接通）位置时，Quantum控制器上的J1939/J1587数据通信接口同时起作用。

适用的SAE文件

本文件与下面列出的SAE技术规范含有提供Quantum通信接口（J1939和J1587）与设备应用类型相连的信息。

SAE 1939		推荐用于串行控制和通信网络的常例（1997年4月）。它提供一个计划的J1939-xx文件列表，还提供有关网络的全套文件和基本操作的简单指导。
SAE J1939-11		物理层（1997年3月）。在250Kb/秒的速度下工作，线性总线带有屏蔽双绞线回路。
SAE J1939-12		物理层（工作草案为ISO 11783 中的第2部分，1997年5月）。在250Kb/秒的速度下工作，线性总线带有四芯绞线。
SAE J1939-13		非机载诊断连接器（1997年1月），指定9-针Deutsch连接器为J1939, J1587和二级CAN网络提供工具、无开关电源和接地连接。
SAE J1939-21		数据通信层（1998年7月），指定CAN 2.0b作为使用的信息协议，同时还定义了J1939应用层的接口。
SAE J1939-71		车辆应用层（1996年5月和97年1月的附录），定义了传输参数值解释规则，允许接收装置确定发送装置能否提供与参数据组有关的所有参数，任何参数是否存在错误状态，或信号是否有效。
SAE J1939-73		诊断应用层（1998年10月）- 诊断。定义在J1939布置方案上执行诊断需要的容量，以确定发生故障的子系统最少可维修的特性，如何发生故障，读取和清除诊断故障代码，诊断指示灯状态的通信，以及提供维修工具监测的多种参数。
SAE J1939-81		网络管理 （1996年11月）
SAE J1587		（1996年3月和97年1月的附录） - 重型设备应用类型微机系统之间的连接SAE/TMC电子数据交换。定义信息和数据的格式以及用于传输频率和环境信息的指导方针。
SAE J1708		物理层（1993年10月）- 重型设备应用类型微机系统之间的串行数据通信。

适用的康明斯文件

可在下列康明斯技术标准和文件中找到数据通信接口的其他信息：

接口技术规范：1377-9804 - 输入和输出的J1939多路传输。为通过J1939数据通信接口而不是通过分离的导线（巡航控制开关输入，指示灯输出等）提供给发动机或由发动机提供的信息提供信号处理要求。

AEB 15.44 Quantum安装建议文件

J1939安装信息

本节提供了在设备上安装J1939数据通信接口需要的信息。请参考AEB 15.44 - Quantum安装建议中的详细信息。

用于QSM11和QSX15的强制性EA（数据通信接口）选装件

不适用于QSK 19

J1939

为在发动机上安装J1939数据通信接口，理解电缆布线和连接器的要求是很重要的。下一节提供了电缆布线和连接器的详细信息。还提供了某些供应商的信息，以便采购电缆和连接器。

3.  电缆布线

主干线束 - 一种最大长度为40米（约131英尺）的线性总线。在给定的时间内可连接至主干网的最大节点数（电子控制器）为30。注意，B和B MATE（配合件）（2按键型）是主干线束和终端连接器按键，B为插座，B MATE为插头。

为了与J1939-11一致，主干线束为带加蔽线的屏蔽双绞线，并在每个网络终端都需要被动终端电阻。J1939-11布局典型用于汽车/公路应用类型。请参考图1。

为了与J1939-12一致，主干线束是带加蔽线的四芯绞线，并在网络的每端都需要主动终端和偏置电路。物理层使得J1939-11无须屏蔽。物理层还采用收发机电路设计，允许J1939-11节点在同一网络中作为J1939-12节点存在。

短线 - 主干线束与每个节点（电子控制器）的连接称为短线，最长为1米（约3.3英尺）。请参考图1。

屏蔽 - 电气连接的屏蔽是通过节点（电子控制器）的总线连接点和主总线的内部连线处的加蔽线来实现的。还应注意屏蔽只能在蓄电池负极的一处接地。尽管屏蔽不能覆盖线性总线或短线连接器（阅读下节中的详细信息）的连接部位，它仍与下段屏蔽电缆建立电气连接，并提供充分的覆盖，以提供必要的电磁兼容性（EMC）。

连接

发动机连接 - Quantum控制器可通过称为短线连接器的3-针未屏蔽连接器与主干线束相连。这在图1中ECU1连接到主干线束的方法中表示出来。图1中还表示出短线连接器有一个特殊键（1类键），在图中表示为A和A MATE，其中A MATE 是另一半配合件。对于图1中有关ECU 1所示的连接类型，三根触针中的一根将用来穿过短线连接器的配合件（A MATE）与加蔽线相连，以便保持屏蔽的电气导通性。另外两个SAE J1939支持的连接电子控制器与主干线束的触针在图X中显示出来。应当注意，ECU 2的连接提供最佳的外壳EMC改进（例如最短的短线）。

注：制作主干线束时，OEM必须提供发动机J1939维修接头。

诊断连接 - 诊断连接器是9针Deutsch连接器，为J1939、二级CAN网络提供工具（用于农业/工程机械应用类型）、无开关电源和接地连接。来自主干线束的诊断连接器允许的最大距离为2/3米（0.67米）。诊断连接器与连接诊断连接器的工具接口电路之间最大允许的距离为另外的1/3米（0.33米）。

对于汽车/卡车工业，SAE推荐的连接器位置处于驾驶室中的操作员侧，并在操作员侧接地。对于J1587的6-针连接器安装，推荐使用Deutsch HD10-6-12P连接器。对于J1939和J1587的9-针连接器安装，建议使用Deutsch HD10-9-1939P连接器 - 请参考AEB 15.10的4.0节中更为详细的信息。

穿墙式连接器（Bulkhead Connection） - J1939数据通信接口可穿过OEM穿墙式连接器。为降低电噪声对数据通信接口的影响，建议不要把导线置于具有极高电流负荷或开关电流的电路附近。建议安装者在所有继电器上设计回程二极管，防止出现系统噪音问题。

Quantum模块支持的信息

本节详细描述了Quantum控制器支持的J1939和J1587操作规程建议信息。还列出了J1939和J15587上发送的信息的参数特征。

J1939支持的信息

康明斯已经确定了J1939的六类性能。它们是：

传动系控制（PT） - 传动系控制类型由发动机与变速箱、ASR和ABS等装置之间交换的参数据组成。

信息共享（IS） - 这种类型具有与通用发动机运转相关的参数。这些参数可以传送，也根据远程系统的要求提供，如发动机冷却液温度、机油压力等。

诊断（DG） - 这种类型包含用于传送故障信息的参数，能够进行指令系统测试，存取测试结果，清除现行和非现行诊断故障代码，以及将与排放有关的现行诊断故障代码从其他诊断故障代码（DTC）中分离出来。

多路传输（MX） - 多路传输的定义 - J1939多路传输是利用J1939数据通信接口代替单独的硬导线发送或接收输入和输出控制指令。多路传输参数的启动是维修调整，可使用VEPS进行调整。多路传输参数的源地址也可通过VEPS进行调整。详细内容请参考输入和输出的1377 – 9804 – J1939多路传输（接口技术规范）。所有帮助实现多路传输的参数均符合这种类型

通用（G）- 未包含在其他5种类型中的所有其他非专用的J1939都分在通用组。示例：应答（ACK/NACK）、传输协议。

服务/专用（SP） - 本类型包含可用于传送专用信息的J1939信息，例如专用于A的PGN。

表1列出了所有Quantum发动机工作台支持的J1939 PGN和参数。请仔细阅读下列注释内容，以便理解表格中的内容。

辅助理解表1的注释：

栏1 列出了SAE PGN编号。

栏2 列出了SAE定义的PGN名称。

而且，SA/DA表示源地址/目的地址，并给出了SAE指定的PGN编号列表。例如，PGN 00000-TSC1和变速箱（Trans）（3）/发动机（Engine）（0）的组合应当解释为源自变速箱（J1939地址3），由发动机接收（J1939地址0）。还要注意，具有J1939地址的任何源地址均可要求PGN。在不是真实地址的地方，规定的地址已经列出。

有些PGN不能在SAE J1939-71和-73中完全定义。它们带有一个星号上标“*”。有关详细情况，请参考表结尾的注释。

栏3 列出了Quantum中的PGN的更新速度。

栏4 指示符合康明斯定义的参数类型。

请注意会有参数属于多种类型的情况。例如 – “发动机功率下降开关”参数属于IS/MX。还应阅读注6。

栏5 列出了PGN内的参数。

栏6-14 描述了Quantum发动机支持的参数。

TX 表示参数从发动机发送， RX 表示发动机接收参数， no 表示不支持的参数。J1939参数支持同时列入TX/RX，表示下列情况：

在非多路传输情况下，参数值从发动机传输（TX）。

在多路传输情况下，发动机接收参数值（RX）。

特定的J1939参数的发送应取决于这些参数的超越调整。这些调整只能在通电之前改变（起作用/不起作用）。超越起作用时，用于这些系统名称的J1939参数应当通过N/A传送（112用于开关，FF16用于模拟值。）

注：  多路传输 - 如果硬连线仍然连接至ECM用于特定的开关/传感器，同时参数设置为多路传输，则ECU将忽略硬连线输入。

 

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. ）