ICP DAS USA GW-7228 User manual

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Quick Start
May 2011 Version 1.2
Package checklist
The package includes the following items:
 One GW-7228 hardware module
 One Quick Start
 One software utility CD
 One screw driver
 One RS-232 cable (CA-0910)
Note:
If any of these items are missed or damaged, contact the
local distributors for more information. Save the shipping
materials and cartons in case you want to ship in the future.
Appearance and pin assignments
CAN DB9 Male Connector
Pin Description
1 Not Connect
2 CAN Low
3 CAN Ground
4 Not Connect
5
6 CAN Ground
7 CAN High
8
9 Not Connect
14-pin screw terminal connecter
Pin Description
1 RS-485 DATA+
2 RS-485 DATA-
3 Not Connect
4 RS-422 Tx+
5 RS-422 Tx-
6 RS-422 Rx+
7 RS-422 Rx-
8 Not Connect
9 RS-232 RXD
10 RS-232 TXD
11 RS-232 GND
12 Not Connect
13 +Vs(+10 ~ +30 VDC)
14 GND

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Figure 1:Appearance of the GW-7228
LED Indication
LED indication of the GW-7228
LED Name GW-7228 Status LED Status
Firmware Updating Mode All LED always turned on
Hardware WDT Fail All LED blink per 1
second
ALL LEDs
Contact to ICP DAS All LED blink per 100 ms
No Error Always turned on
CAN Bus Transmission Fail Blink per 100 ms
CAN Bus-Off Blink per 500 ms
Can’t Claim Address in J1939 Network Blink per 1000 ms
PWR LED
Power Failure Off
Transmission Blink
J1939 LED Bus Idle Off
Transmission BlinkMODBUS
LED Bus Idle Off
Installation
If users want to start the GW-7228 normally, it needs to follow these steps to
install the GW-7228 below:
Step1: Check GW-7228 Firmware Mode
Users need to set the dip-switch to the “Normal” position as Figure 2 and reset

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the power, and then the GW-7228 would run in the operation mode.
Figure 2:Operation mode Position of Dip-Switch
Step2: J1939 network - CAN bus connection
Connect the CAN ports with the GW-7228 modules and ECU (e.g. engine) in
J1939 network using the following structure as Figure 3.
Figure 3:CAN bus Wire Connection
Step3: Modbus network - Serial port connection
It is recommended to use only one serial port (RS232, RS422 or RS485) of
the gateway at the same time. The following figure describes the three COM port
types to a serial device via serial network.
Figure 4:Serial port wire connection

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Step4: Power wire connection
Connect the power supply to the GW-7228 module’s power terminal connecter,
please see the following connection as Figure 5.
Figure 5:Power Wire Connection
GW-7228 Utility Configuration
Modbus Network Configuration
The GW-7228 and the controller must be set the same serial communication
parameters of the Modbus network configuration. The Modbus network
configuration screen from GW-7228 is shown as Figure 6.
Figure 6:Modbus configuration screen
J1939 Network Configuration
The device NAME should be set according to the application and the vendor
where the module is being used based on the J1939 network specification.
The J1939 network configuration screen from the GW-7228 is shown as
Figure 7.
Figure 7:Modbus configuration screen

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J1939 I/O Configuration
The following figure is a PGN definition about Electronic Transmission
Controller, we want to receive the Transmission Output Shaft Speed from the
transmission and send the Transmission Input Shaft Speed to the transmission via
the GW-7228. The following table shows the current planning.
Figure 8:Example of a parameter group definition of SAE J1939/71
Table 1:Configuration data of J1939 and Modbus
Parameters PGN Data
Length
(bytes)
Byte Order
In J1939
Data Field
Byte Order
in
MODBUS
MODBUS
Address
Send
Input Shaft
Speed
61442(Dec)
F002(Hex) 2 5 0 40001
Receive
Output Shaft
Speed
61442(Dec)
F002(Hex) 2 1 0 30001
Note:PGN/Data Length(Bytes)/Byte Oder in J1939 Data Field
=> Transmission manufacturers provide the information required
Byte Order in MODBUS
=> User-defined Modbus address

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Figure 9:J1939 configuration screen
Upload Parameter to the GW-7228
After the previous parameter settings, users need to upload the parameters to
the GW-7228.
Figure 10:Parameter upload screen
Modbus Communication
Set J1939 output data
Using the Modbus command as below:
FC16 Write multiple registers (4xxxx) for AO
Example:
In the address 40001, write the value in 0x1234.
[Request Command] (Byte0, Byte1... Byten) (Hex)
01 10 00 00 00 01 02 12 34 AB 27(CRC)
Byte
Order In
Modbus
Data
Length PGN
(DEC)
Priority
ECU’s
J1939
Address
ECU’s
J1939
Address
Transm-
ission
Repetiti-
on
Byte Order
In J1939
Data Field

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Get J1939 input data
Using the Modbus command as below:
FC4 Read multiple input registers (3xxxx) for AI
Example:
Read a value of one word in the address 30001.
[Request] (Byte0, Byte1... Byten) (Hex)
01 04 00 00 00 01 31 CA(CRC)
GW-7228 responds a value of one word in the address 30001.
[Response](Byte0, Byte1... Byten) (Hex)
01 04 02 12 34 B4 47(CRC)
Start or Stop sending J1939 output message
1、Using the Modbus command as below:
FC6 Write single register (4xxxx) for AO
Example: Start sending J1939 output message
In the address 42009, write the value in 0x00.
[Request Command] (Byte0, Byte1... Byten) (Hex)
01 06 07 D8 00 00 08 85(CRC)
Example: Stop sending J1939 output message
In the address 42009, write the value in 0x01.
[Request Command] (Byte0, Byte1... Byten) (Hex)
01 06 07 D8 00 01 C9 45(CRC)
Or
2、Enable / Disable the Auto Transmission function as below, and upload to
GW-7228:
Figure 11:J1939 Auto Transmission function screen

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Troubleshooting
Item
Trouble state Solution
1 CAN Bus Transmission Fail
(Power LED Blink per 100 ms)
Make sure the CAN bus wiring is connected, and
connected to the correct pin.
2 CAN Bus-Off
(Power LED Blink per 500 ms)
Make sure the CAN bus wiring does not short-circuit
3
Can not Claim Address in J1939
Network
(Power LED Blink per 1000 ms)
Please configure another J1939 network address in GW-
7228 Utility.
4
Can not transmit the output J1939
message
1. Make sure the Start/Stop sending J1939 output
message register (42009) is 0x00.
2. Make sure the Update Rate of J1939 output message
table is not zero.
5
How to restore factory default 1. Power on the GW-7228
2. Change the Dip-Switch position of the GW-7228
and to complete the following steps in 5 seconds.
Step1. From “Normal” to “Init” position.
Step2. From “Init” to “Normal” position.
Step3. From “Normal” to “Init” position.
Step4. From “Init” to “Normal” position.
3. When the correct implementation of the above
steps, the J1939/Modbus LEDs of the GW-7228
should be turn on, and that should be turn off
after 500 ms later.
4. Reset the power of the GW-7228, and the GW-
7228 would back to factory defaults.
5. Reconnect the GW-7228 by using the network
setting as 115200 baud with none parity, 1 stop
bit and 1 Net ID.
Technical Support
If you have problems about using the GW-7228, please contact
ICP DAS Product Support.
Email: Serv[email protected]om
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