Our SAE J1939 ECU Simulator Board with USB Port allows any host device (e.g., PC) with a USB COM port to monitor SAE J1939 data traffic and communicate with the SAE J1939 vehicle network, making it suitable for simulating SAE J1939 data traffic. The simulation of SAE J1939 signals (i.e., PGNs) is a valuable tool for any situation, from a product line test, incoming inspection, and business demonstration to product development and product validation.
The device is fully compatible with the SAE J1939 protocol, including J1939/81 Network Management (Address Claiming) and J1939/21 Transport Protocol (TP), ensuring seamless integration into your existing systems. The gateway also communicates flawlessly with our jCOM1939 Monitor, an SAE J1939 Monitoring, Analyzer, and ECU Simulation software under Windows.
The JCOM1939 Monitor Software is a comprehensive all-in-one tool that can be used for monitoring, analyzing, and simulating SAE J1939 data traffic. It is a user-friendly Windows software that displays SAE J1939 data traffic. It allows users to scan the network, simulate an ECU (including full node address negotiation features), and respond to data request messages. It is a comprehensive and easy-to-understand software that can help you analyze and simulate SAE J1939 data traffic.
To set up and operate a diesel truck simulator, a thorough understanding of the SAE protocol functionality described in SAE J1939 is crucial. We strongly recommend having a copy of the SAE J1939/71 Standard at hand as it outlines the format of thousands of PGNs (i.e., diesel engine parameters), and the simulation and monitoring of SAE J1939 data traffic are highly application-specific. Below, you can find sample data that illustrates the importance of understanding the SAE J1939/71 Standard.
For more information, see:
Diesel Truck Signal Simulation
To simulate some frequently used SAE J1939 signals, we have chosen the following parameters:
- Engine Speed
- Wheel Based Vehicle Speed
- Accelerator Pedal Position
- Engine Oil Pressure
- Engine Oil Temperature
- Engine Coolant Temperature
- Fuel Level
- Engine Fuel Rate
- Engine Fuel Economy
- Vehicle Position (GPS)
All of the above parameters are transmitted automatically using their corresponding frequencies. The following signals are available on request, a modus also supported by our simulator board.
- Engine Hours of Operation
- Vehicle Identification Number (VIN)
- Time/Date
- Vehicle Direction
The image below lists these parameters, including their definition (PGN, SPN, frequency, etc.):
Note: The jCOM1939 Monitor Software is a generic, free-of-charge software, i.e. it allows the setup of any PGN as needed for your simulation needs. We have merely chosen some frequently used PGNs for demonstration purposes.
The following image demonstrates how these signals have been entered (and saved to a file) using the JCOM1939 Monitor Software:
All signals are transmitted into an SAE J1939 vehicle network and displayed on the screen in order of appearance.
Application File
We have created an application file containing the parameters as described above. Download the app file through the link below, then start the jCOMJ1939 Monitor software, click on File->Open, and select the file.
- Download the Diesel Engine Simulation File…
Click on ECU Simulation Mode and then click the Claim Address command button, and the data transmission will start.
SAE J1939 Starter Kit and Network Simulator
Our JCOM.J1939 Starter Kit and Network Simulator is designed to allow the experienced engineer as well as the beginner to experiment with SAE J1939 data communication without the need of connecting to a real-world J1939 network, i.e., a diesel engine. It may sound obvious, but in order to establish a network, you need at least two nodes, and that fact applies especially to CAN/J1939 where the CAN controller will basically shut down after transmitting data without receiving a response. For that reason, our jCOM.J1939 Starter Kit and Network Simulator consists of two J1939 nodes, namely our jCOM.J1939.USB, an SAE J1939 ECU Simulator Board with USB Port.
The jCOM.J1939.USB gateway board is a high-performance, low-latency vehicle network adapter for SAE J1939 applications. The board supports the full SAE J1939 protocol according to J1939/81 Network Management (Address Claiming) and J1939/21 Transport Protocol (TP).
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