OCENAV ATM105A1N User manual

OCENAV ATM105A1N/2/3, ATM200
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OCENAV ATM105A1N/2/3–MULTIPLEXER GATEWAYS and
ATM200- ATALOGGER (V2.xx)
Contents
1. General operation: ............................................................................. 2
1.1- Protocols and Input / Output channels: ...................................... 3
1.2- Data input filtering: ............................................................................. 4
1.3- Calculation of the “Perfor ance” data: ....................................... 6
1.4- Output data filtering: .......................................................................... 7
1.5- Data trans ission:............................................................................... 8
1.6- Base station for the re ote control: ............................................. 8
1.7- Alar s center: ....................................................................................... 9
1.8- Datalogger: (ATM200) .................................................................... 10
2. Before you install the device: ...................................................... 12
3. Installation: ....................................................................................... 15
4. Wifi, NMEA183 and NMEA2000 Configuration: .................... 17
5. Software updates:............................................................................ 19
6. Technical data: ................................................................................. 19

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1. General operation:
The ATM105A1N / 2/3 and ATM200 are triple protocol gateways
and operate in real ti e following the following process:
1) Reception of the data sent by the navigation instru ents in
any protocol (NMEA0183, NMEA2000 and Seatalk ™) in the
physical input channels (NMEA0183_CH1 to CH3,
NMEA0183_WiFi, CANBUS and Seatalk ™ network).
2) Except for ATM105A1N, radio reception of re ote control
co ands for autopilot.
3) Filtering of this infor ation according to its nature and
supervision in order to establish priority orders,
identification of the type of pilot and to establish the validity
ti es for the data.
4) Fro the pri ary infor ation, execution of calculations to
generate "perfor ance" data, such as real and geographical
wind, drift intensity and direction, VMG, VMC, etc.
5) Alar s control and activation / deactivation.
6) Data filtering before being sent to avoid saturation and loops
on each output channel.
7) Generation of related sentences in all protocols and sending
to the output channels, to the pilot and to the re ote control
ATM105B.
Connectivity:
Up to 6 input channels: 1xSeatalk, wired 3xNMEA0183,
1xNMEA0183 WiFi and 1xNMEA2000. (ATM105A3 /
ATM200)
Up to 5 output channels: 1xSeatalk, wired 2xNMEA0183,
1xNMEA0183 WiFi and 1xNMEA2000. (ATM105A3 /
ATM200)

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1.1- Protocols and Input / Output Channels:
1.1.1- Seatalk™: It is a bidirectional channel (input / output)
for ed by 3 wires: Red (+ 12v), Black (Ground, 0v) and
Yellow (Data). All Seatalk devices share the sa e data
line. It works with electric levels of 0 / 12v, with 0 being
the do inant value for collision detection. There is no
aster device or bus anager.
The speed is 4800 bits per second (baud) in
asynchronous 9-bit co unication. It uses blocks of
variable length binary data called datagra s.
More infor ation in:
http://www.tho asknauf.de/seatalk.ht
1.1.2- NMEA0183: It is a text type protocol (Sentences) and
can work on different physical channels: RS232, RS422,
WiFi and Ethernet. In the last two, encapsulation can be
found within TCP / IP or UDP packets.
There can only be one trans itting device on each RS232
/ RS422 channel, but up to 3-4 receivers can be
connected:
The Ocenav gateway units have up to 3 optocoupled
RS422 input channels (receivers) with speeds fro 4800
to 115200 baud, up to 2 output RS422 channels
(trans itters), and a WiFi UDP channel with
independent input / output ports.
The standard speed over RS422 is 4800 baud, reaching
38400 for co unications with AIS.
More infor ation in:

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www.plaisance-pratique.co /IMG/pdf/NMEA0183-2.pdf
1.1.3- NMEA2000: Standard IEC61162-3) It is a protocol
derived fro J1939 used in the auto otive industry but
with essages fro arine instru entation.
Its electrical signals are co patible with the "Controller
Area Network" (CAN Bus), consisting of 5 wires: NET+,
NET-, +12v, Ground and Shield. It is a bidirectional bus.
The co unication speed is 250k bits per second.
With the exception of ATM105A2, all OCENAV centrals
have NMEA2000.
More infor ation at:
https://en.wikipedia.org/wiki/NMEA_2000
1.2- ata input filtering:
All OCENAV gateways carry out the following supervision
and control operations:
1.2.1- Bus Protocol. Establish ent of the protocols of
connection and identification with the rest of the
equip ent.
NMEA2000 Identification “Iso Address Clai ”: Bridge
device with initial address: 49 and auto atic change if
there is another device with the sa e address. “PGN
Request”: Request for “Iso Address”.
Seatalk Identification: Bridge Device “Bridge”.
NMEA0183 identification according to the type of
sentence: $ II for instru entation, $ GP for GPS, $ EC for
Electronic Chart or navigator, $ AI for AIS sentences.
1.2.2- GNSS and Navigation Priorities. The GPS/GNSS are
constantly onitored. If there is ore than one GPS in
the syste , when a failure of ore than 5 seconds of the

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ain GPS, secondary is enabled auto atically., and data
flow is updated. The order of priority is established
based on the HDOP sent by each GPS / GNSS receiver
connected to the gateway, and the lowest value is taken.
The switching is auto atic.
Although it is not advisable to activate navigation
si ultaneously on ore than one device, the order of
priority for the Navigation data is as follows:
1) NMEA2000. (The highest priority)
2) Internal GPS (ATM200 odel).
3) NMEA0183, WiFi.
4) NMEA0183, channel 1.
5) NMEA0183, channel 2.
6) NMEA0183, channel 3.
7) NMEA0183 WiFi.
8) Seatalk. (The lowest priority).
1.2.3- Validity time control. The validity ti e of vital data for
navigation is controlled.
The ti e for GPS data is 15 seconds.
The ti e for the Navigation data is 5 sec.
After these ti es without valid data, the control panel
generates an alar signal.
1.2.4- ata Priority. So e data is prioritized based on its
accuracy. For exa ple, there are 3 Seatalk datagra s for
coordinates: 1 for latitude (0x50), 1 for longitude (0x51),
and 1 lat / Lon (0x58). In the first two, the precision is
1/100 of a inute and in the last, the precision is
1/1000. The syste will read the 1/1000 (0x58) and
ignore the other two.

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The sa e is true for log speed, heading error (XTE), and
rudder angle data.
The ATM105A generates agnetic declination if it is not
receiving it fro a GPS device. The user can also force this
calculation by selecting “Generate Magnetic variation
(declination) in the setup.
1.3- Calculation of the "Performance" data:
- The device uses the Declination (internal or received by
any channel) and Deviation to co plete heading data and for
MAG <-> TRUE conversions.
- Translation of wind sentences between the two for ats
MWV and VWR.
- Transfor ation of position sentences: GLL-GGA, heading:
HDG-HDM-HDT and navigation to waypoint: RMB-BWC.
- NMEA0183 data is sent in all possible units: eters / feet /
fatho s, and knots / k h.
- Set and drift calculation if agnetic heading (HDG), speed
through water (STW), COG and SOG are available. The RMB
sentence is co pleted, calculating the VMG on the waypoint.
(NMEA0183 and N2K).
- Calculation of the true wind fro the apparent wind and
the GPS speed. (NMEA0183 and NMEA2000).
- Auto atic generation of STW fro the SOG, if the log
transducer is not connected. (In Seatalk and NMEA2000).
Useful for calculating true wind in Ray arine
instru entation.
- Calculation of the direction and intensity of the geographic
wind TWD, fro the apparent wind AWS, AWA, HDT, COG
and SOG.(Kit eteo needed).
- Calculation of the VMG value of wind (VMC) if it receives
data of speed and direction of the apparent wind and SOG.- --
- The data that nor ally present so e instability are

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exponentially averaged to i prove precision and facilitate
reading. (HDG, STW, AWA, AWS, TWA, TWS, TWD, COG, SOG,
Depth ...)
- Optional extension with at ospheric pressure, cabin
te perature and relative hu idity transducers. The
ATM200 odel is originally equipped with a 9-axis
gyroco pass with autocalibration, internal GPS and
eteorological sensors.
1.4- Output data Filtering:
Unlike other existing gateways on the arket, the
ATM105A1N / 2/3 and ATM200 establish a rotating output
sequence that is opti al to avoid both overflow and to
ensure that all data is sent in a short space of ti e. ti e over
slow NMEA0183 channels. (no ore than 1 sec).
These Ocenav gateways li it the frequency of repetitive
type sentences (Heading or COG / SOG, for exa ple)
received fro NMEA2000 between 1 and 4 per second
depending on their priority, since it is a very fast bus
(250,000 bps).
There is no such li itation for security sentences (AIS /
Marpa).
Each channel has its data output filtered with its
corresponding input, eli inating redundancy. In this way,
the data traffic is reduced to the ini u possible, because
only those that are not available on that channel are sent. In
addition, dangerous data loops are eli inated.

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1.5- ata transmission:
The data is trans itted in the three protocols towards the
different physical channels. Two exchanges can be linked to
expand and diversify the network:
1.5.1- Gateway via WiFi: The device can be configured as
Access Point (by default) or as a client. In such a way that
it can be connected to another WiFi present in the
installation, and even to another OCENAV central. This
allows to share navigation data wirelessly between 2
distant points of the boat in any of the other channels
and protocols, and / or to add ore equip ent to the
syste .
1.5.2- Seatalk, NMEA2000 or NMEA0183 links:
Two OCENAV gateways can be linked to each other
through any of their BUSES. Seatalk and NMEA2000 can
be used, although channel 2 of NMEA0183 configured to
115200 can also be used to increase speed. In the latter
case, galvanic isolation between the two centrals would
be achieved because they would be optocoupled.
This ethod also allows ore equip ent to be
connected to the syste with ini al wiring.
1.6- Base station for the remote control:
The ATM105A2 / A3 and ATM200 link with the ATM105B
re ote unit, supplying navigation data and generating the
co ands for the autopilot and the anchor windlass. It
Controls the backlight of Seatalk instru entation.
The autopilot detection is auto atic: STxxxx – S artpilot,
Evolution and Sinrad B&G si net autopilots.

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1.7- Alarms center:
There is an optional alar odule configurable by the user
through a WEB for sent by the gateway. The available
alar s are:
- Maxi u apparent wind.
- Mini u depth.
- Low quality GPS data. GPS failure.
- Arrival at the waypoint.
- Pass the Waypoint. (perpendicular to the WPT).
- RADAR security ring: MARPA and AIS. User progra able
distances.
- Activation of the dragging alar when the descent of the
anchor is activated for ore than 4 seconds. Deactivation
when raising the anchor. Progra able distance.
- Weather alar . Maxi u variation of at ospheric
pressure per hour, progra able by the user. Pressure /
te perature transducer required.
The alar s are audible (internal and external buzzer with
light) and also visible and audible on the re ote control.
They are canceled by pressing any key on the re ote
control.

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1.8- atalogger: (ATM200)
The ATM200 has a socket for icroSD cards. The user can
select the data to be recorded, its frequency and duration of
each data file, by editing the CONF200.txt file present on the
sa e icroSD card:
SAVE_FREQ=15 / Sa ple interval (seconds)
FILE_TIME=10 / File Capture Ti e (hours / file)
SAVE_NAV=NO / Save Navigation Data: XTE, WPT BRG, VMG
SAVE_WIND=NO / Save Relative and True Wind Data: speed and angle
SAVE_WATER=YES / Save Depth, Te perature and Speed
SAVE_STEER=YES / Save M.Heading, Rudder angle, Autopilot angle
SAVE_ATTIT=YES / Save Rotation speed (deg/sec), Pitch and Roll
SAVE_METEO=NO / Save Air te p(C), Pressure(Bar), Relative Hu idity(%)
SAVE_AIS=YES / Save clossest target: MMSI, Distance, Ru b and Speed
SAVE_ENGINE1=NO / Save RPM, Coolant pressure, te p, Gear, Trans Te p
SAVE_ENGINE2=NO / Save RPM, Coolant pressure, te p, Gear, Trans Te p
The files created are of type .CSV co patible with Excel, and
their na es correspond to the UTC date and ti e of creation
for better identification.
SAVE_FREQ is the ti e between captures in seconds.
(Reco ended values: 10-15 seconds).
When the ti e of a file (FILE_TIME) runs out, another file
with a new na e is opened and recording continues until
the equip ent is turned off.
Each file will contain a nu ber of captures equal to
(FILE_TIME * 3600) / SAVE_FREQ. In the exa ple: 10 *
3600/15 = 2400 lines.
The syste filters the AIS data in such a way that only the
data of the closest “target” is recorded in the interval of each