GW-7238D J1939 to MBTCP Server / MBRTU Slave Gateway User’s Manual (Ver.1.0, Nov. 2011) --- 29
Table 3-4 J1939 Input/Output Configuration Parameter
Item
Description
Range
Register
Offset
The offset setting into the Modbus I/O
Register data, the offset is in bytes.
In the Input Table, the offset is into the
Modbus AI Input table (Dec).
Input Register Offset
(Byte)
Modbus Input Register
(Word)
0,1
30001(LSB/MSB)
2,3
30002(LSB/MSB)
…
…
3070, 3071
31536(LSB/MSB)
In the Output Table, the offset is into the
Modbus AI Output table (Dec).
Output Register Offset
(Byte)
Modbus Output
Register
(Word)
0,1
40001(LSB/MSB)
2,3
40002(LSB/MSB)
…
…
3070, 3071
41536(LSB/MSB)
0~1535
(byte)
Data
Length
The amount of the data to be transferred
between the Modbus I/O table and the J1939
message data, the length is in bytes.
0~1785
(byte)
PGN
The J1939 PGN is associated with this data
field.
In Input Table, the data from messages
received with this PGN will be transferred into
the Input table.
In Output Table, a message with this PGN will
be built and transmitted using data from the
Output table.
Any kinds
of J1939
Parameter
Group
Number
Priority
The data is used to optimize message latency
for transmission onto the bus only; the priority
of any message can be set from highest, 0, to
lowest, 7.
0~7
