ADF Web HD67949-B2, Руководство пользователя

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User Manual NMEA2000 / MQTT
Document code: MN67949_ENG Revision 1.000 Page 25 of 32
TRANSMIT NMEA 2000
By pressing the “
Transmit NMEA 2000 ” button from the main window of SW67949 the window “Transmit NMEA 2000 Frames” appears
(Fig. 6).
The means of the fields of the table are:
In the field “ Priority ” the priority of the NMEA 2000 message is defined. In NMEA 2000 protocol, the priority is a number between 0
and 7. ‘0’ is the highest priority and ‘7’ is the lowest;
In the field “ PGN ” the PGN of the NMEA 2000 message to be written from MQTT is defined (in NMEA 2000 protocol the PGN is an
identifier);
In the field “ Source Address ” the address of the device that sends the frame is defined;
If the field “ Fast Packet ” is checked, the frame will use the Fast Packet functions;
In the field “ Num Byte ” the number of bytes of the NMEA 2000 message is defined;
If the field “ On Request ” is checked, the NMEA 2000 frame is sent when arrive a request frame from the NMEA 2000 network;
If the field “
Data Change
” is checked, the NMEA 2000 frame is sent when a byte from MQTT side changes value;
If the field “ On Timer ” is checked, the NMEA 2000 frame is sent cyclically;
In the field “ Send Timer ” the delay (in milliseconds) with which sending the NMEA 2000 message is defined;
In the field “ Mnemonic ” a description for the frame is defined.
Figure 6: “Transmit NMEA 2000 frame” window