Maretron M001101 - Manual (Page 17)

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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.