GW-7228 J1939/Modbus RTU Slave Gateway
User’s Manual (Ver 1.3, Apr/2011) ------------- 3
Table of Contents
1.
Introduction ....................................................................................... 5
1.1
Mode of operation .............................................................................. 6
1.2
Features ............................................................................................. 6
1.3
Specifications ..................................................................................... 6
2.
Hardware ........................................................................................... 8
2.1
Block Diagram .................................................................................... 8
2.2
Pin Assignment .................................................................................. 9
2.3
Hardware Connection ...................................................................... 10
2.3.1
CAN port connection ...................................................................... 10
2.3.2
Serial port connection...................................................................... 11
2.4
Terminator Resistor Settings ............................................................ 12
2.5
Watchdog Timer Settings ................................................................. 13
2.6
Init / Normal Dip-switch .................................................................... 13
2.6.1
Firmware Update Mode .................................................................. 13
2.6.2
Firmware Operation Mode .............................................................. 16
2.7
LED Indication .................................................................................. 17
2.8
Cable Selection ................................................................................ 18
3.
Software ........................................................................................... 20
3.1
Configuration Tool
– GW-7228 Utility ............................................... 20
3.2
GW-7228 Utility ................................................................................ 21
3.2.1
Connection Screen ......................................................................... 21
3.2.2
Main Screen ................................................................................... 23
4.
Communication Network ................................................................ 30
4.1
Modbus Network .............................................................................. 30
4.1.1
Supported Modbus Functions ........................................................ 30
4.1.2
Modbus Address ............................................................................ 30
4.2
J1939 Network ................................................................................. 32
4.2.1
Communication Methods ................................................................ 32
4.2.2
Parameter Groups .......................................................................... 32
4.2.3
Suspect Parameter Number (SPN) ................................................ 33
4.2.4
J1939 Message Transmission ........................................................ 34
4.2.5
J1939 Receiving Messages ........................................................... 35
4.2.6
Transport Protocol for Large Messages ......................................... 35
5.
Application ...................................................................................... 36
5.1
Hardware Installation ....................................................................... 36
5.2
GW-7228 Utility Configuration .......................................................... 40
5.2.1
Modbus Network Configuration ...................................................... 40
