Press Enter to edit the specific Device Instance or press the spacebar/right cursor key to go one step deeper in the menu
structure to a page showing all the generic data available for that device:
14.9. NMEA2000-out technical details
14.9.1. NMEA 2000 Glossary
Here is a glossary to help with the interpretation of this text:
• Virtual-device: a Battery Monitor, Inverter, or other Victron device that does not have a CAN-bus port by itself, made available
“virtually” on the CAN-bus by the NMEA2000-out function of the GX device.
• CAN-bus: the VE.Can port on the GX device, that, in the context of this chapter, is most likely connected to a NMEA 2000
network.
• NMEA2000-out: the software feature in the GX device, which is described in this chapter.
• NMEA 2000: Marine CAN-bus protocol, based on J1939.
• Instance: there are many types of instances, and explained in detail below.
• J1939: A set of standards defining a CAN-bus protocol, defined by the SAE organisation.
• Address Claim procedure (ACL): a mechanism, specified by J1939 and used in NMEA 2000 by devices on the network to
negotiate and assign each device on the network a unique network addresses. It is a number from 0 to 252. There are three
special network addresses defined:
1. 0xFD (253) - Reserved
2. 0xFE (254) - Unable to claim address - for example when all others are in use
3. 0xFF (255) - The broadcast address
14.9.2. NMEA 2000 Virtual-devices
When the NMEA2000-out feature is enabled, the GX device acts as a bridge: it will make each Battery monitor, Inverter/charger
or other device that is connected available individually on the CAN-bus. Individually, as in each with its own network address, its
own Device instance, function codes, and so forth.
For example, a GX device with two BMVs connected on a VE.Direct port and an inverter/charger connected using VE.Bus, will
make the following data available on the CAN-bus:
Address Class Function Description
0xE1 130 (Display) 120 (Display) The GX device itself
0x03 35 (Electrical generation) 170 (Battery) The 1st BMV
0xE4 35 (Electrical generation) 170 (Battery) The 2nd BMV
0xD3 35 (Electrical generation) 153 The inverter/charger (AC-output)
0xD6 35 (Electrical generation) 154 The inverter/charger (AC-input)
14.9.3. NMEA 2000 Classes and Functions
As per NMEA 2000 specification, these define the types of senders and devices connected to the CAN-bus. Classes are the main
categories and functions specify it to a further detail.
Color Control GX Manual
Page 93 Marine MFD integration by NMEA 2000
To Next Page
Loading...
