Installation manual

Simrad ES60
NMEA
The National Marine Electronics Association (NMEA) has
defined communication standards for maritime electronic
equipment, and the ES60 echo sounder conforms to these
standards. The most common standard is NMEA 0183,andthe
National Marine Electronics Association describes it as follows:
• The NMEA 0183 Interface Standard defines electrical signal
requirements, data transmission protocol and time, and
specific sentence formats for a 4800 baud serial data bus.
Each bus may have only one talker but many listeners.
For m ore information about the National Marine Electronics
Association and the NMEA 0183 standard, refer to the
organization’s web pages at w
ww.nmea.org.
Telegrams
To move information between two electronic units, the data are
collected in
telegrams. The content (protocol) of each telegram is
defined by the NMEA standard, and several telegram types exist
to allow different type of data to be distributed.
The phrase
datagram is also frequently used about this
communication method.
Unless you wish to write your own software, you do not need to
know how these telegrams are designed. However, whenever
you set up equipment interfaces, you need to ensure that each
system on your communication line is set up to send and receive
the same telegram. The standard allows one system to send data
(a “talker") and several others to receive data simultaneously
("listeners") on the same line. Therefore, you must ensure that
all products receiving data on a communication line is set up
to receive the same telegram(s) that the transmitting product
provides.
Standard NMEA 0183 communication
parameters
The communication parameters defined for NMEA 0183 are:
• 4800 bits per second
• 8 data bits
•noparity
• one stop bit
Some instruments will a lso offer other parameters and/or choices.
Ethernet interfaces
The following interfaces are set up to transmit and receive
information by m eans of ethernet lines.
84
304699/A