ICP DAS USA GW-7238D User manual

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Quick Start
Nov. 2011 Version 1.0
Package checklist
The package includes the following items:
 One GW-7238D 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
Table 1:COM Connector Pin Assignment
Pin No. Name Description
1 CTS1 CTS pin of COM1 (RS-232)
2 RTS1 RTS pin of COM1 (RS-232)
3 RXD1 RXD pin of COM1 (RS-232)
4 TXD1 TXD pin of COM1 (RS-232)
5 INIT* Initial pin for enable/disable AUTOEXEC.BAT
6 (Y)D2+ Data+ pin of COM2 (RS-485)
7 (G)D2- Data- pin of COM2 (RS-485)
8 (R)VS+ V+ of power supply
9 (B)GND GND of power supply
Table 2:CAN bus Connector Pin Assignment
Pin No. Name Description
1 N/A Not Connected
2 CAN_L CAN_L bus line (dominant low)
3 N/A Not Connected
4 CAN_H CAN_H bus line (dominant high)
5 N/A Not Connected

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Figure 1:Appearance of the GW-7238D
LED Indication
Table 3: LED indication of the GW-7238D
LED Name GW-7238D Status LED Status
Firmware is running On
PWR LED Power Failure Off
No Error Off
ERR LED Error Blink
Transmission Blink
J1939 LED
Bus Idle Off
Transmission BlinkMODBUS
LED Bus Idle On or Off

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5-digits 7-segment LED Displays
Figure 2: The meaning of the 7-segment LED
Installation
If users want to start the GW-7238D normally, it needs to follow these steps
to install the GW-7238D below:
Step1: Check GW-7238D Firmware Mode
Users need to set the dip-switch to the “Normal” position as Figure 3 and reset
the power, and then the GW-7238D would run in the operation mode.
Figure 3:Operation mode Position of Dip-Switch

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Step2: J1939 network - CAN bus connection
Connect the CAN ports with the GW-7238D modules and ECU (e.g. engine) in
J1939 network using the following structure as Figure 4.
Figure 4:CAN bus Wire Connection
Step3: Modbus network - Serial / Ethernet port connection
The GW-7238D can communicate both Modbus TCP and Modbus RTU to
J1939 at the same time. In Modbus RTU communication, it is recommended to
use only one serial port (RS-232 or RS-485) of the gateway at the same time.
The following figures describe the COM, Ethernet and Power port connections.
Figure 5:COM, Ethernet and Power port connections of GW-7238D
Step4: Power wire connection
Connect the power supply to the GW-7238D module’s power terminal
connecter; please see as Figure 5.

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Step5: Connect to GW-7238D
When in the first connection, the controller may run the Serial network at
115200 baud with none parity, 1 stop bit and 1 Net ID; or run the Ethernet
network and set on the same subnet to connect via IP address(192.168.255.1)
shown as below figure.
Figure 6:Connection Interface of GW-7238D Utility
GW-7238D Utility Configuration
Modbus Network Configuration
The GW-7238D and the controller must be set the same serial communication
parameters or be on the same subnet via Ethernet communication of the Modbus
network configuration.The Modbus network configuration screen from the GW-
7238D is shown as Figure 7.
Figure 7:Modbus configuration screen

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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-7238D is shown as
Figure 8.
Figure 8:Modbus configuration screen
J1939 I/O Configuration
The following figure is a PGN definition about Electronic Transmission
Controller when users want to receive the Transmission Output Shaft Speed from
the transmission and send the Transmission Input Shaft Speed to the
transmission via the GW-7238D.
Figure 9:Example of a parameter group definition of SAE J1939/71

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Table 4: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/Byte Oder in J1939 Data Field
=> Transmission manufacturers provide the information required
Byte Order in MODBUS
=> User-defined Modbus address
Figure 10:J1939 configuration screen
Upload Parameter to the GW-7238D
After the previous parameter settings, users need to upload the parameters to
the GW-7238D. Please refer to the following figure to finish the operation.
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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Figure 11:Parameter upload screen
Modbus Communication – Modbus RTU
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)
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-7238D responds a value of one word in the address 30001.
[Response](Byte0, Byte1... Byten) (Hex)
01 04 02 12 34 B4 47(CRC)

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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、Without have to control the Modbus register 42009 (Dec), just enable
“Auto Transmission” function in J1939 configuration area as below, and
upload to GW-7238D.
Figure 12:J1939 Auto Transmission function screen
Modbus Communication – Modbus TCP
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)
00 00 00 00 00 09 01 10 00 00 00 01 02 12 34

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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)
00 00 00 00 00 06 01 04 00 00 00 01
GW-7238D responds a value of one word in the address 30001.
[Response](Byte0, Byte1... Byten) (Hex)
00 00 00 00 00 05 01 04 02 12 34
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)
00 00 00 00 00 06 01 06 07 D8 00 00
Example: Stop sending J1939 output message
In the address 42009, write the value in 0x01.
[Request Command] (Byte0, Byte1... Byten) (Hex)
00 00 00 00 00 06 01 06 07 D8 00 01
Or
2、Without have to control the Modbus register 42009 (Dec), just enable
“Auto Transmission” function in J1939 configuration area as below, and
upload to GW-7238D.
Figure 13: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’t Claim Address in J1939 Network
(Power LED Blink per 1000 ms)
Please configure another J1939
network address in GW-7238D
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-7238D
2. Change the Dip-Switch
position of the GW-7238D 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-7238D should
be turn on, and that should be
turn off after 500 ms later.
4. Reset the power of the GW-
7238D, and the GW-7238D
Step1
Step2
Step3
Step4

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would back to factory defaults.
6. Reconnect the GW-7238D by
using the serial network
setting as 115200 baud with
none parity, 1 stop bit and 1
Net ID; or run the Ethernet
network and set on the same
subnet to connect via IP
address(192.168.255.1)
Technical Support
If you have problems about using the GW-7238D, please contact
ICP DAS Product Support.
Email: [e-mail]