Maretron WSO200 User Manual page 20

WSO200 User's Manual
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Temperature Instance – This field is used to distinguish the temperature reading from
this device from those of other devices. The value of this field is user-programmable.
3: Temperature Source – The WSO200 sets this field to a value of 0x01 to indicate that
the temperature reading is a reading of outside temperature.
4: Actual Temperature – This field is used to indicate the outside air temperature in units
of 0.01°K.
5: Set Temperature – This field is not used by the WSO200 and is set to a value of "Data
Not Available".
6: Reserved
PGN 130313 – Humidity
The WSO200 uses this PGN to provide a regular transmission of outside humidity. The factory
default for periodic transmission rate is disabled. The transmission of this PGN can be enabled
(see PGN 126208 – NMEA Request Group Function – Transmission Periodic Rate).
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Humidity Instance – This field is used to distinguish the humidity reading from this
device from those of other devices. The value of this field is user-programmable.
3: Humidity Source – The WSO200 sets this field to a value of 0x01 to indicate that the
temperature reading is a reading of outside humidity.
4: Actual Humidity – This field is used to indicate the outside humidity in units of 0.004%.
5: Set Humidity – This field is not used by the WSO200 and is set to a value of "Data Not
Available".
6: Reserved
PGN 130313 – Actual Pressure
The WSO200 uses this PGN to provide a regular transmission of atmospheric pressure. The
factory default for periodic transmission rate is disabled. The transmission of this PGN can be
enabled (see PGN 126208 – NMEA Request Group Function – Transmission Periodic Rate).
Field 1: SID – The sequence identifier field is used to tie related PGNs together. For example,
the WSO200 will transmit identical SIDs for 130306 (Wind Data) and 130311
(Environmental Parameters) to indicate that the readings are linked together (i.e., the
data from each PGN was taken at the same time although they are reported at slightly
different times).
2: Pressure Instance – This field is used to distinguish the pressure reading from this
device from those of other devices. The value of this field is user-programmable.
3: Pressure Source – The WSO200 sets this field to a value of 0x00 to indicate that the
temperature reading is a reading of atmospheric pressure.
Page A2
Appendix A – NMEA 2000
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Interfacing Revision 1.0