Airmar NMEA 2000® Depth, Датчики User Manual

Page 50

DST200 User Manual revision 1.000

Proprietary and Confidential

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:

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