Maretron M001101 User Manual

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Revision 1.0 
Appendix A – NMEA 2000
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 Interfacing 
Page A1 
Appendix A – NMEA 2000
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 Interfacing 
 
RAA100 NMEA 2000
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 Periodic Data Transmitted PGNs 
 
PGN 127245 – Rudder 
The RAA100 uses this PGN to indicate the attached rudder instance and rudder angle. 
 
 Field 1:  Rudder Instance – This field is used to identify the rudder instance number and 
ranges between 0 and 251.  
 
2: Direction Order – This field identifies a directional command contained in this 
message.   The RAA100 ships from the factory with a default value of 0x0 indicating 
that  no direction order is contained in this message. 
 
3:  Reserved – This field is reserved by NMEA; therefore, the RAA100 sets all bits to a 
logic 1. 
 
4:  Angle Order – This field is used to indicate an angle order directed towards a rudder 
actuator The RAA100 ships from the factory with a default value of 0x7FFF indicating 
that no angle order is present in this message. 
 
5:  Position – This field is used to indicate the current angle of the rudder in units of 
0.0001 radians. 
 
6:  Reserved – This field is reserved by NMEA; therefore, the RAA100 sets all bits to a 
logic 1.