Kongsberg Simrad SN90, Installation Manual

Page: 206 / 298

204
381298/C
Setting up the interfaces to peripheral
devices
Topics
Setting up the input from a navigation system, page 204
Setting up the input from a Motion Reference Unit (MRU), page 208
Setting up the SN90 in a synchronized system, page 209
IP addressing and UDP port principles, page 212
Setting up the input from a navigation system
In order to read navigational data (position, speed, distance and heading) from an external
sensor, you must choose which interface port to use, and then which datagram(s) to read.
Prerequisites
This procedure assumes that:
• You have a vacant interface port on your Processor Unit.
• You are familiar with NMEA and other relevant datagram formats.
• You know how to set up the parameters for serial and local area network (LAN)
communication.
Context
Most Global Positioning System (GPS) receivers provide NMEA 0183 telegrams
containing speed, sailed distance as well as geographical latitude and longitude
information. Some GPS systems will also provide the current heading, but this
information is normally taken from the gyro.
Procedure
1 Connect the navigation system to an available communication port on your
Processor Unit.
• Observe the applicable requirements related to cabling.
• Ensure that the total length of the serial line cable does not exceed approximately
50 meters. If a longer cable is required, you may need to use buffer amplifiers.
• If the Processor Unit is not fitted with a suitable serial line connector, use a
USB-to-serial converter. Several types are commercially available.
2 Click the
Setup
icon.
The icon is located under the
Main
menu. It is used to open the
Setup
menu.
Simrad SN90