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User Manual
J1939 / CAN - Converter
Document code: MN67439_ENG Revision 1.101 Page 17 of 33
Page 17 of 33
RECEIVE J1939:
By pressing the “
Receive J1939
” button from the main
window for SW67439 (Fig. 2) the window “Receive J1939 Frames” appears (Fig. 4).
This section is used to define the J1939 messages accepted by the converter.
The means of the fields of the table are:
In the field “
Data Page
” the data page of the J1939 message is defined. The value can be 0 or 1 (usually it is 0);
In the field “
PGN
” the PGN of the J1939 message to be read from CAN is defined (in J1939 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 will use Transport Protocol functions (it is used to send more than 8 bytes);
In the field “
Start Byte
” the starting byte to map on CAN side is defined. This field is enabled only when the field “Transport Protocol”
is checked;
In the field “
Num Bytes
” the number of consecutive bytes starting from the “Start Byte” is defined;
If the field “
Cancel Data
” is checked, the Time Out on the data is Enable. When the data arrived from J1939 are older than the
TimeOut (defined in the section “Set Communication”), the data bytes will be set to 0xFF value;
If the field “
On Request
” is checked, the Remote Request frame is enable. The converter sends the Remote Request frame cyclically
with an interval expressed in the “Time(ms)” fields.
In the field “
Time(ms)
” the interval of the Remote Request is defined.
In the field “
Mnemonic
” the description for the frame is defined.
Figure 4: “Receive J1939 Frames” window
