Maretron TMP100 Exhaust Gas Temperature Probe TP-EGT-1 - Manual (Page 18)

TMP100 User's Manual
Page A2 Appendix A – NMEA 2000 Interfacing Revision 1.0
PGN 130312 –Temperature
The TMP100 uses this PGN to provide a regular transmission of various temperatures. The
factory default for periodic transmission rate is once every two seconds. The transmission of
this PGN can be disabled (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 TMP100 will transmit identical SIDs for 130312 (Temperature) 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 – The TMP100 sets this field to identify a particular
temperature measurement from the source specified in Field 3. Every temperature
measurement from a given source type on the network should have a distince
instance value, so that monitoring devices and displays can identify which
measurement is which.
3: Temperature Source – This field is used to indicate the type of temperature
measurement being taken. Possible values for this field include Sea Temperature,
Outside Temperature, Inside Temperature, Engine Room Temperature, Main Cabin
Temperature, Live Well Temperature, Bait Well Temperature, Refrigeration
Temperature, Heating System Temperature, and Freezer Temperature.
4: Actual Temperature – This field is used to indicate the temperature, whose source is
specified in field 2, in units of 0.01°C.
5: Set Temperature – The TMP100 sets this field to a value indicating “data not
available”.
6: Reserved bits – The TMP100 sets all bits in this field to a value of “1”.