Quick Start Guide for ST-NMEA (USB) V1.00
TEL + 44 1179 554474 www.digitalyacht.co.uk
4. Operation
4.1
Power Up
The ST-NMEA Converter is designed to start converting data as
soon as it powers up and no setup or configuration is required.
As it powers up all four of the LEDs will flash once and then
either the Yellow “ST” or “NMEA” LED will come illuminate or
flash to indicate what mode and baud rate the ST-NMEA
Converter is set to (see section 4.x).
After about 1 second, the Yellow LEDs will go off and the Green
“Power” LED should turn ON to indicate that the unit has
powered up correctly.
As data starts to be received
from the SeaTalk network or on the USB interface (from the computer) the Yellow “ST1” and
“NMEA” LEDs will flash. If they are not flashing, then no data is being received on that interface.
The Red “Error” LED indicates a data transmission issue and if it should illuminate or flash please contact Digital Yacht.
4.2
Data Conversions
All supported NMEA Sentences received will be converted into SeaTalk data, as long as that type of data is not already
on the SeaTalk network i.e. if an NMEA depth sentence is received, but there is already a SeaTalk Depth Instrument
putting depth data on to the SeaTalk network, then the NMEA depth sentence would not be converted.
If you are using the ST-NMEA Converter to send data from a PC to the SeaTalk network, then it is important that the
same data is not already on the SeaTalk network otherwise the ST-NMEA Converter will not do the conversion. If for
instance you are sending Nav Data from a chart plotting program to drive a SeaTalk Autopilot, ensure no other SeaTalk
devices are also outputting that same type of data
Here is a list of the current NMEA0183 Sentence Conversions that the ST-NMEA Converter Supports and update rates:
OUTPUT
(Convert from SeaTalk to USB)
INPUT
(Convert from USB to SeaTalk)
APB
1 sec
DPT
DPT
1 sec
HDG
HDG
1 sec
MTW
MTW
4 sec
MWV
MWV
1 sec
RMC
RMB
1 sec
VHW
RMC
*
1 sec
RSA
1 sec
VHW
1 sec
VLW
4 sec
*
NOTE
– Time UTC from GPS is only updated every 10 secs on the SeaTalk network
If the ST-NMEA receives more NMEA Sentences than the SeaTalk Network can handle it will automatically filter/discard
excessive sentences, so you can connect a 10Hz GPS or Compass sensor without flooding the SeaTalk network.
Содержание ST-NMEA
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