Industrial
Electronic Devices
ADFweb.com S.r.l.
User Manual
NMEA2000 / MQTT
Document code: MN67949_ENG Revision 1.000 Page 24 of 32
RECEIVE NMEA 2000:
By pressing the “
Receive NMEA 2000
” button from the main window for SW67949 (Fig. 2) the window “Receive NMEA 2000 Frames”
appears (Fig. 5).
The means of the fields of the table are:
In the field “
PGN
” the PGN of the NMEA 2000 message to receive is defined (in the 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 “
Transport Protocol
” is checked, the frame can use transport protocol functions;
If the field “
Fast Packet
” is checked, the frame will use the Fast Packet functions;
In the field “
Start Byte
” the starting byte to save on MQTT side is defined;
In the field “
Num Bytes
” the number of consecutive byte from the starting one is defined. For example, if the Start Byte is ‘20’ and
Num Bytes is ‘10’, it is possible to read the byte from 20 to 30;
If the field “
Cancel Data
” is checked, when the data is oldest of the time inserted in the “TimeOut Data”, the converter sets “0xFF” in
the bytes of the internal memory array reserved for the PGN;
In the field “
Mnemonic
” the description for the frame is defined.
Figure 5: “Receive NMEA 2000 Frames” window
