Airmar NMEA 2000® Depth, Датчики - Manual (Page 50)

DST200 User Manual revision 1.000
Proprietary and Confidential
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This PGN provides a method of reporting the results of the Power On Self Test performed by the DST200. The various tests performed by the POST are simple tests to determine
if the hardware is minimally responding to software stimuli. The POST function should not be regarded as a comprehensive indicator that a given unit is healthy. In other words,
it is possible that a defective unit might still pass the POST operation. However, the POST can be useful to identify certain types of problems with the DST200.
Field 4, Control, specifies whether this PGN will report the results of the last test, or whether the DST will conduct a new self test prior to reporting the results. This field should
be specified when requesting a single transmission of this PGN.
This PGN may be configured to transmit periodically by specifying an Update Rate using the Request Group Function PGN 126208. By default, this PGN is not transmitted
periodically.
If Field 4, Control, is not specified, then Field 4 will be regarded as 0 (report previous values) for single requests, and 1 (generate new values) for periodic transmissions.
The Power-On Self Test is performed automatically a few seconds after applying power to the unit.
Table of IDs and Failure Codes:
ID
Description Failure Codes
1 Format Code 0x01 = Format Code mismatch
0x02-0xEF = reserved
2 Factory EEPROM 0x01-0xEE = count of checksum errors
0xEF = one or more illegal values detected
3 User EEPROM 0x01-0xEE = count of checksum errors
0xEF = one or more illegal values detected
4 Water temperature sensor Models DST200, DT200, and ST200:
0x01 = Thermistor shorted
0x02 = Thermistor open
0x03-0xEF = reserved
Models DT200S and D200ST:
0x01-0xEE = reserved
0xEF = Sensor not present
5 Sonar transceiver (depth) 0x01 = Sonar not functional
0x02-0xEF = reserved