English What are the basic
configuration items of a J2K100 and how do I perform them using a DSM250?
The J2K100 is a bridge
between two different digital networks. One side of the bridge is connected to
a J1939 network and the other side of the bridge is connected to an NMEA 2000®
network. This video assumes you have a working knowledge of the two networks.
If you don’t have a basic understanding of the networks, you might want to read
the application note found at the end of the J2K100 user manual before
attempting to configure the J2K100.
The J2K100 ships from the
factory preconfigured to look for engine information coming from an engine with
a J1939 address of zero. This engine information is in turn broadcast over the
NMEA 2000 network using instance zero. Therefore, if there is a single engine
on the vessel using J1939 address zero and the NMEA 2000 displays are looking
to receive information from instance zero, then no configuration of the J2K100
is necessary. However, you still might want setup a corresponding label for the
J2K100 like “Starboard Engine” so that the engine data is easily identifiable
when you go to setup your screens.
Let’s take a look at doing
basic configuration of the J2K100 using the DSM250, begin by pressing the enter
key, which takes us to the main menu.
Scroll to configuration and press
the enter key.
Scroll to Device
configuration and press the enter key.
Scroll to the particular J2k100
you wish to configure and press the enter key.
First is the Advanced
Configuration menu item, which isn’t normally used except by advanced users
that completely understand the J2K100 after reading the manual. The items under
the advanced configuration menu are covered in another video.
The next menu entry is
Engine Instance. NMEA 2000 displays use instance numbers to distinguish which
engine data to display. The NMEA 2000 convention is to use instance 0 for a single
engine or the port engine of a multiple engine vessel. Instance 1 is used for
the starboard engine in two engine vessels. To change the instance number that
you want broadcasted by this J2K100, press the enter key and use the up and
down arrows to select the appropriate instance. Here we will select instance 1
so the J2K100 that we are configuring will transmit engine information over the
NMEA 2000 network using instance 1. NMEA 2000 displays looking to show
starboard engine information will lock onto this J2K100.
Next, let’s configure the
Device Label. The Device Label allows you to create text, like “Starboard
Engine” that is associated with instance number configured in the prior step.
Later when you go to setup screens on Maretron’s DSM250 display or within the
N2KView, you can easily identify the “Starboard Engine” as opposed to “engine
instance 1”. To configure the Label simply, press the enter key with Device
Label highlighted, this will bring you to the text menu. Using the available
categories create your desired text. When done scroll to save and exit and press
the enter key.
Next, let’s configure the
J1939 Source Address. First, notice along the bottom of the screen a list of
addresses that the J2K100 is able to identify with active devices on the
connected J1939 network. If you don’t see any addresses then the J2K100 isn’t
communicating with any devices on the J1939 network. Make sure you have made
all the necessary connections and the ignitions are turned on. Now we are ready
to tell the J2K100 which J1939 address to gather information in preparation for
re-broadcasting the information over the NMEA 2000 network. For example, we
will configure the J2K100 to look for information coming from a device using
address 1 on the J1939 network.
Given this configuration,
engine instance 1 and J1939 source address 1, the J2K100 picks up information
from the J1939 device using address 1 and converts the information to an NMEA
2000 format and broadcast it over the NMEA 2000 network using instance 1. All
displays expecting to show data for the starboard engine pick up NMEA 2000 data
corresponding to instance 1. Please note that it isn’t necessarily a one-to-one
correspondence between the J1930 source address and the NMEA 2000 engine
instance. Although NMEA 2000 is always looking for a single or port engine to
be instance 0 and the starboard engine to be instance 1, some J1939 engine
manufacturers use different source addresses that are generally programmed by
the engine manufacturers. Please remember to use the bottom of the
configuration screen to identify what source addresses the engine manufacturers
are using.
The next menu item is Refresh
J1939 source address list. Whenever you first enter the J2K100 configuration
screen, the address list along the bottom of the screen is updated. If you
don’t want to back out of the configuration screen and come back in, then you
can press the enter key to refresh the address list. \Pau=1000
The last menu item is
transmission instance. Like engine instance you can tell the J2K100 which
transmission instance you would like the J2K100 to use when broadcasting over
the NMEA 2000 network. Like engines, the NMEA 2000 practice is to use instance 0
for the port transmission and instance 1 for the starboard instance. Of course
this configuration parameter assumes you are trying to translate information
from a J1939 transmission as opposed to an engine.
Now you have completed your
configuration of the Maretron J2K100 - NMEA 2000® J1939 Bridge. Press the Back button four times to return to
the Favorite screens mode.
0 Bytes ) 
Subscribe to Article
Print Article
Email Article to Friend
Export to PDF
Export to MS Word