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FX
-J1939 User's Manual
3U
9.4
Request PGN
This command can be used to request a J1939 message frame with a certain PGN from the network.
This command is prohibited in Layer 2 communication Mode.
This command is supported in the FX
Note
It is not possible to request PDU1 PGNs with a different DA than the current FX
#28). The PS byte of the requested PDU1 PGN must be set to H00.
e.g. FX
-J1939 BFM #28 = H80
3U
BFM #1001/#1002
HB100
HB101 to HB1FF
BFM No.
BFM #1000
Command:
BFM #1001
PGN bit 15 to 0
BFM #1002
PGN bit 17 and 16
BFM #1003
Priority
BFM #1004
Destination address
BFM #1005
BFM #1006
BFM #1007
BFM #1008
BFM #1009
Not used
BFM #1010
BFM #1011
BFM #1066
*1.
PGN to be requested is specified in the 18 bits, bit 0 to 17, in BFM #1001 and #1002 as shown below.
PGN Not Used (Set bit 2 to 15 to OFF.)
*2.
The valid range of the message priority, the first three bits in the 29 bit ID, is between K0 to K7.
K0 is the highest priority.
*3.
Destination node address. Set HFF to this BFM to send a broadcast request. Valid range of the
destination node address is K0 to K253, or K255 for broadcast. Destination address must be different
from the FX
*4.
The number of data bytes received (sum of the data buffer and extended data buffer).
*5.
Data buffer (standard frames up to 8 bytes)
*6.
Extended data buffer
When more than 8 bytes of data are received, the first 8 bytes are located in BFM #1006 to #1009,
and bytes 9 to 122 are stored in BFM #1010 to #1066. If the data exceeds the standard length of 8
bytes, the data will be segmented and received in several frames.
-J1939 firmware Ver. 1.10 or later.
3U
BFM #1004
H00 to H7F,
Valid setting, FX
H81 to HFD
HB180 (HB100 + BFM #28 value).
Valid setting, FX
HFF
with PGN HB1FF (HB100 + HFF).
x
INVALID setting for PDU1 Format PGN request.
TO (Write Access)
H1200
*1
*1
*2
*3
BFM #1002
Bit 2 to 15 (Bit 18 to 31)
EDP (Extend data page)
-J1939 address (BFM #28).
3U
Description
-J1939 will send a request for PGN HB100, expecting a response with PGN
3U
-J1939 will send a Broadcast request for PGN HB100, expecting a response
3U
Description
FROM (Read Access)
High Byte
H1201:
Reception complete
Received PGN bit 15 to 0
Received PGN bit 17 and 16
Received priority
Received source address
DLC (Data Length Count)
2nd data byte
4th data byte
6th data byte
8th data byte
10th extended data byte
12th extended data byte
122nd extended data byte
Bit 1 (Bit 17)
Bit 0 (Bit 16)
DP (Data page) PDU Format (PF) PDU specific (PS)
9 Command Interface
9.4 Request PGN
-J1939 node address (BFM
3U
Low Byte
For other response codes,
refer to Section 9.8
*4
*5
*5
1st data byte
*5
*5
3rd data byte
*5
*5
5th data byte
*5
*5
7th data byte
*6
9th extended data byte
*6
11th extended data byte
*6
121st extended data byte
BFM #1001
Bit 8 to 15
Bit 0 to 7
1
2
3
4
5
6
7
*6
*6
*6
8
9
10
75
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