Yacht Devices YDNU-02NF User Manual - page 23

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Where:

•  echo is a built-in command of an operating system;

•  YDNU MODE 0183 is a special command sent to the Device (turn on 0183 mode);

•  > (greater-than symbol) is an operator that redirects command output.

We  used  the  same  port  names  (specified  after  the  output  redirection  sign  >)  above,  as  were  used  

in the examples of chapter III. The command will be confirmed by a one second green signal of the LED  

and the value set will be saved to the EEPROM.

The special command YDNU SILENT ON does not actually change the operation mode, but it prohibits 

sending of all outgoing messages from PC applications to the NMEA 2000 network, making the Device 

“read-only”. We will call this the "silent mode" for simplicity.

echo YDNU SILENT ON > COM3

echo YDNU SILENT ON > /dev/cu.usbmodem00090001

stty -F /dev/ttyACM1 hupcl

echo YDNU SILENT ON > /dev/ttyACM1

This setting is recommended if you are not planning to control the marine systems from PC applications. 

It  protects  the  NMEA  2000  network  from  the  threat  of  flooding  caused  by  an  incorrectly  configured  

PC application. When the “silent mode” is on, the LED signal when the Device powers on is red, otherwise 

green (see chapter IV).

The  command  YDNU  SILENT  OFF  returns  the  Device  to  the  normal  bi-directional  mode.  Both  

(on and off) commands are confirmed by a one second green signal of the LED and the setting will be saved  

to the EEPROM.