TMP100 User's Manual
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”.
Page A2 | Appendix A – NMEA 2000 Interfacing | Revision 1.0 |