User's Manual - Exemys

SGW1-MB-NM User’s Manual
Exemys
Exemys products are in permanent evolution to satisfy the needs customers’ needs. For this
reason, specifications and capabilities are subject to change without notice.
Please find updated information at www.exemys.com
Copyright © Exemys. All Rights Reserved.
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SGW1-MB-NM User’s Manual
Exemys
Introduction
About this manual
Purpose of this manual
The purpose of this manual is to provide the instructions to quickly and simply install and operate
the SGW1-MB-NM
General Description of the Product
The SGW1-MB-NM is a NMEA to Modbus converter. The device will read incoming NMEA sentences
on one of its serial ports. Then it will parse the sentence and put that information into a Modbus
register. The Modbus registers can be read with any standard Modbus master device.
NMEA supported sentences are: GGA, VTG and MWV
Power supply connection
As you can see on the image the power source of the SGW1-MB-NM doesn’t have a polarity. I you
are using a DC power source you can connect either the + or – terminal to terminal 1 and the
other one on terminal 2.
Serial ports connection
The SGW1-MB-NM is a DTE. That means that it will send data out of its Tx terminal and receive
data on its Rx terminals. If you connect it to another DTE you should cross Tx and Rx terminals.
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SGW1-MB-NM User’s Manual
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The SGW1-MB-NM has three serial ports, each of them with a particular function.
COM A
This is the console port. You can use this port to configure the device as described on the
Command Console section. Please follow this diagram to assemble a cable to connect the device
to a computer’s RS232 port.
COM B
You must connect the GPS or other NMEA device to this serial port. On the next diagram you’ll find
a connection example. Please read your NMEA device’s manual to connect it properly.
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SGW1-MB-NM User’s Manual
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COM C
This is the Modbus slave port. You must connect your Modbus master device to this port. It’s a
RS485 port.
LED indicators
LED “L1” will blink each time the devices receives a Modbus query.
LED “L2” will blink each time the devices receives a NMEA sentence.
Modbus registers
On the next table you will find how each NMEA sentence is mapped into Modbus registers. If your
NMEA device is not sending one of the listed sentences you will read zeros.
GGA
40001 UTC Time (low register)
40002 UTC Time (high register)
40003 Latitude (low register)
40004 Latitude (high register)
40005 Longitude (low register)
40006 Longitude (high register)
40007 GPS Quality
40008 Number of satellites
40009 Horizontal Dilution
40010 Altitude (low register)
40011 Altitude (high register)
40012 Unit Altitude
40013 Geoidal separation
40014 Units of geoidal separation
40015 Age of differential GPS data
VTG
40016 True track made good
40017 Magnetic track made good
40018 Ground speed, knots
40019 Ground speed, Kilometers per hour
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SGW1-MB-NM User’s Manual
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MWV
40020 Wind angle
40021 Reference R=relative and T=true
40022 Wind speed
40023 Wind speed units
40024 Status
From here you will find detailed information for each NMEA sentence and Modbus register.
GGA
UTC 40002-40001
It’s a 32 bits integer. The time is expressed using two digits for hour, two for minutes and two for
seconds.
Ex. The decimal value 102654 means 10:26:54
Latitude 40004-40003
It’s a 32 bits signed integer. The latitude is expressed in degrees and its decimal fraction times
10,000,000.
Ex. The decimal value 465845500 means 46.58455º North
Longitude 40006-40005
It’s a 32 bits signed integer. The longitud is expressed in degrees and its decimal fraction times
10,000,000.
Ex. The decimal value 685400 means 0.06854º East
GPS Quality 40007
It’s a 16 bits integer
Number of satellites 40008
It’s a 16 bits integer
Horizontal dilution 40009
It’s a 16 bits integer (times 10)
Altitude 40011-40010
It’s a 32 bits signed integer. The altitude is expressed in feet or meters and its decimal fraction
times 10.
Ex. The decimal value 2356 means 235.6 feet/meters.
Unit Altitude 40012
It’s a 16 bit ASCII value (8 msb are zero) representing the altitude unit.
Geoidal Separation 40013
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SGW1-MB-NM User’s Manual
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It’s a 16 bits integer (times 10)
Units of Geoidal Separation 40014
It’s a 16 bit ASCII value (8 msb are zero) representing the separation unit.
Age of differential GPS data 40015
It’s a 16 bits integer representing a age times 10.
VTG
True Track Made Good 40016
It’s a 16 bits integer (times 10)
Magnetic Track Made Good 40017
It’s a 16 bits integer (times 10)
Ground Speed, knots 40018
It’s a 16 bits signed integer. The speed is expressed in knots and its decimal fraction times 10.
Ground Speed, kilometers per hour 40019
It’s a 16 bits signed integer. The speed is expressed in kph and its decimal fraction times 10.
MWV
Wind Angle 40020
It’s a 16 bits signed integer. The angle is expressed in degrees and its decimal fraction times 10.
Wind Speed 40021
It’s a 16 bits signed integer. The speed is expressed in corresponding unit and its decimal fraction
times 10.
Wind Speed Units 40022
It’s a 16 bit ASCII value (8 msb are zero) representing the speed unit.
Status 40023
It’s a 16 bit ASCII value (8 msb are zero) representing the status.
Command Console
The console will allow you to modify the device’s configuration. You must connect the SGW1 to a
computer’s RS232 serial port and open a terminal program like Hyperterminal.
Important: The serial port must be configured at 9600 bps, 8 data bits, no
parity, 1 stop bit (9600,8,N,1)
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After powering the device on you should see this welcome message.
SGW1-MB-NM NMEA to Modbus converter - Exemys (1.0):
--------------------------------------------------
>
Typing the following commands you will be able to configure the Modbus and NMEA serial ports.
After each command type : and the desired value.
MBBAUD
MBPARITY
MBTYPE
MBID
MBPKTTOUT
NMEABAUD
NMEAPARITY
NMEABITS
NMEASEND
NMEALISTEN
NMEAVERB
FACTRESET
LIST
HELP
Modbus port Baud rate
1200,2400,4800,9600,14400,19200,28800,33600,38400,57600,115200
Modbus port Parity
N for none, E for even, O for odd
Modbus type
R for RTU, A for ASCII
Modbus slave ID
1 to 247
Modbus RTU packet time out (don’t change this value unless you know exactly what
it means)
3 to 50
NMEA port Baud rate
1200,2400,4800,9600,14400,19200,28800,33600,38400,57600,115200
NMEA port Parity
N for none, E for even, O for odd
NMEA port data bits
7,8
Send a direct message to the NMEA device (use it to configure your NMEA device)
Type the desired message alter the colons
Enables NMEA to console pass through (all NMEA sentences received will be
repeated on the console port, use it for initial setup)
Enables NMEA parsing verbose (You will see on the console all the parsed values
each time the devices receives an NMEA sentences)
Sets the device to factory defaults
Lists the configuration
Display all the available console’s commands
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SGW1-MB-NM User’s Manual
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Technical Specifications
• Communication protocols:
• Communication ports:
• NMEA sentences:
• Management:
• System firmware:
• Indicators:
• Dimensions / Weight:
• Power supply:
• Environmental:
• Guarantee / Support:
Modbus RTU, Modbus ASCII, NMEA 0183
2 RS232 Industrial plugabble terminal blocks.
1 RS485 Industrial plugabble terminal blocks.
GGA, GLL (GPS), MWV (Anemometers) *
RS232 Serial console.
Downloadable via RS232..
NMEA data
Modbus data
Power
4.49 x 3.94 x 0.89 in. (HxWxL).
(114 x 100 x 22.5 mm).
0.31 Lbs (0.140 Kg).
10 to 30 Volts DC.
200 mA max.
Operating temperature: 23 to 149 ºF (-5 to 65 ºC).
Storage temperature: -40 to 167 ºF (-40 to 75 ºC).
1-year guarantee.
Technical support included.
* If you need other NMEA sentence contact our tech support team.
Ordering information
PART NUMBER
RS232
RS485
SGW1-2100-IA-MB-NM 2
1
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