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FX
-J1939 User's Manual
3U
1. PGN bit 17 to 0 (include Destination Address)
PGN to be transmitted is specified by the lower 18 bits (bit 0 to 17) as shown below. The PGN must also
include the Destination Address if applicable.
Note
For unused messages, set HFFFFFFFF to the PGN.
A PGN contains following four fields information. The PF field decides whether PDU 1 format or PDU 2 format
is used. In PDU 1 format (PF = K0 to K239), the PS field contains the destination address for the message. In
PDU 2 format (PF = K240 to K255), the PS field contains the group extension.
Bit
31............18
Not Used (Set bit 2 to 15 to OFF.)
Note
• When a configuration parameter of the FX
value must include the target node address if the PGN is using PDU 1 Format. If a PGN is using PDU 2
format, the PGN does not require target address.
e.g. PGN 59904 shall be used to request certain information from the network from node 30.
PGN 59904 is shown below.
PGN 59904 (HEA00)
Bit
Not Used (Set bits 2 to 15 to OFF.)
As this PGN is PDU 1 format, it requires a destination address. PGN with added target address to PS field
is shown below.
Bit
Not Used (Set bit 2 to 15 to OFF.)
Therefore, PGN (including destination address) is set to 59934 (HEA1E).
• Some PGNs can not be combined with certain destination addresses.
- Overview Rx Message valid and invalid settings
Format
PDU1
PDU1
PDU2
*1.
Address HFE is an invalid address for all user messages.
17
EDP (Extend data page)
3U
31............18
EDP = OFF
31............18
EDP = OFF
Destination
DLC
*1
0 to 8
Any
BFM #27
HFF
9 to 250
Any other address
*1
(not BFM #27, not HFF)
-
0 to 250
6.2 [BFM #500 to #973] Configuration Area
16
DP (Data page)
PDU Format (PF)
-J1939 requires a PGN (including destination address), the set
17
16
DP = OFF
17
16
DP = OFF
Mode
Setting Valid
Setting Valid
Setting Valid (receive Broadcast messages)
J1939
Setting Invalid. DLC 9 to 250 requires a Point to Point
communication
connection. As the "Destination" address is not equal
to BFM #27 or Broadcast, the FX
participate in the Point to Point communication.
Setting Valid
6 J1939 Communication Mode
15........8
7......0
PDU specific (PS)
15........8
7......0
PF = EA (hex)
PS = 00 (hex)
15........8
7......0
PF = EA (hex)
PS = 1E (hex)
Description
-J1939 can not
3U
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