0x1ed00), Command group function – Airmar NMEA 2000® Depth, Датчики User Manual

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DST200 User Manual revision 1.000

Proprietary and Confidential

NMEA 2000® RECEIVED PARAMETER GROUP

PGN

126208

(0x1ED00)

Command Group Function

Single Frame:

Access Level:

For further information about the NMEA 2000® protocol, including field descriptions refer to the document, NMEA 2000® Standard for Serial-

Data

Networking of Marine Electronic Devices available from NMEA.

Notes

This received PGN is used by the DST to set the value of one or more parameters in a Parameter Group. The individual parameters of the Commanded PGN are specified in the

Field Number/Value pairs (fields 6 and 7 of this PGN). Refer to the detailed description for each transmitted PGN for specific instructions regarding which fields to specify when

using the Command Group Function PGN 126208. (Note that some required fields are not changeable, but are used as qualifiers when changing other fields.)
This PGN may also be used to specify the Priority field of a given transmitted PGN. (Note: certain PGNs do not permit changing the Priority field.)
Upon receiving this PGN, the DST will respond by transmitting the Acknowledge Group Function PGN 126208.
Use the proprietary received PGN 126720-130 to reset all Priority fields for all PGNs to their factory defaults.
All parameter value fields must be padded (with 1's) if necessary to ensure byte boundaries are adhered to.
When the Commanded PGN field 2 (of PGN 126208) refers to a proprietary PGN, fields 1 and 3 (manufacturer code and industry group) of the proprietary PGN must be

specified first in the list of field number and parameter value pairs in PGN 126208. All other field number and parameter value pairs may appear in any order in this message.
For proprietary PGNs described in this document, fields 1, 2, and 3 (manufacturer code, reserved bits, and industry group) of the proprietary PGN may optionally be combined

into a single 16-bit field when specifying fields in PGN 126208. For Airmar proprietary PGNs, the 16-bit field is constructed as follows:

•

bits 15-13 = binary 100 = decimal 4 (industry group for "Marine Industry")

•

bits 12-11 = binary 11 = reserved bits

•

bits 10-0 = binary 000 1000 0111 = decimal 135 (manufacturer code for Airmar Technology)

The concatenation of these 16 bits produces the binary value 1001 1000 1000 0111 = hexadecimal 0x9887. Therefore, instead of specifying the two fields, 11-bit field 1 and

3-bit field 3 for a proprietary PGN, it is permissible to specify a single 16 bit field 1, containing the value 0x9887, for the proprietary PGNs described in this document.

When doing so, field 3 may not also be specified, or the PGN will not be accepted. The 16-bit field 1 must be specified first in the list of field number and parameter value

pairs in PGN 126208.