Victron VE.CAN PGN Definitions Explained

Key Takeaways

• Victron VE.Can uses NMEA 2000 PGNs for communication between devices.
• Proprietary messages, called VREGs, use PGN number 61184 (0xEF00) for non-standard parameters.
• PGN 127501 (0x1F20D) is a common Binary Status Report, with meanings varying by device.
• Specific alarm details for chargers can be found using proprietary register 0xEDDA.

What are Victron VE.Can PGNs?

Victron Energy devices communicate over a CAN bus network using a standard called NMEA 2000. Within this standard, data is organized into messages known as Parameter Group Numbers (PGNs). These PGNs define the structure and meaning of the data being transmitted, allowing different devices on the network to understand each other.

Victron utilizes both standard NMEA 2000 PGNs and its own proprietary PGNs to convey specific information about device status, measurements, and alarms. Understanding these definitions is crucial for advanced monitoring, integration with third-party systems, and diagnosing communication issues within a Victron energy system.

Understanding Victron VE.Can Communication

The VE.Can network is a robust communication backbone for Victron systems. It allows components like battery monitors, chargers, and inverters to share data seamlessly. This section details how Victron structures its communication using PGNs.

Proprietary Messages (VREGs)

Victron uses a specific PGN for its proprietary messages, known as VREGs. These messages are designed to transmit parameters that cannot be adequately covered by standard NMEA 2000 PGNs.

• PGN number 61184 (0xEF00): This PGN is designated for all Victron proprietary messages (VREGs). If you encounter this PGN, it indicates a Victron-specific data transmission. Detailed information about the structure and content of these VREGs is available in the document "VE.Can registers - public.docx". However, this document is not publicly provided by Victron Energy.

Proprietary Error Codes

For certain Victron chargers, specific alarm reasons are communicated via a proprietary register.

• Register 0xEDDA: When the "Alarm" status bit is set to "On" in a Binary Status Report (PGN 127501), the specific alarm reason for devices like the BlueSolar Charger 150/70 & 150/85 or Skylla-i can be queried using this Victron proprietary register.

Common Victron VE.Can PGNs and Their Meanings

The following table outlines common PGNs and their associated status reports for various Victron devices. These reports provide binary (On/Off) indications of device conditions.

This table provides a quick reference for interpreting the Binary Status Report (PGN 127501 / 0x1F20D) from different Victron devices. The specific conditions reported can vary depending on the device's function.

Communication Protocol Basics

The VE.Can interface uses the Controller Area Network (CAN) protocol, which is a robust standard for vehicle and industrial automation. NMEA 2000 is a higher-level protocol built on CAN, specifically designed for marine electronics, but widely adopted in other applications due to its reliability and structured data format.

When integrating Victron devices into a larger system or troubleshooting communication issues, it is important to understand that the physical layer (cabling, termination resistors) and the data link layer (CAN) must be correctly configured before the application layer (PGNs) can function. While this article focuses on PGN definitions, ensure your VE.Can network's physical connections are sound.

Safety

This article discusses communication protocols and data definitions. There are no direct safety concerns related to interpreting PGNs themselves. However, always follow safety guidelines when working with electrical systems and Victron hardware. Disconnect power before making any physical connections or disconnections.

When to call a technician instead

Understanding PGN definitions is generally for advanced users, system integrators, or those troubleshooting complex communication issues. If you are experiencing persistent communication errors, or if your Victron system is not functioning as expected and you cannot resolve it by checking basic connections and settings, it is best to consult a qualified Victron Energy installer or technician. They have access to specialized tools and documentation, such as the detailed VREG information, which may not be publicly available.