NEXCOM VTC 7100-C8SK - Manual (Page 91)

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Appendix F: OBDII Module Setup and Command
VTC 71-C Series User Manual
Appendix F: OBDII Module Setup and Command
OBDII Module
VTC series offer an option to integrate the OBDII module, VIOX-CAN01, into
VTC system. The form factor of this VIOX-CAN01 is proprietary and it can
support either SAE J1939 or SAE J1708 via connection in the first time. The
maximum VIOX-CAN01 installed in VTC series is up to three units. Please
note they are factory option.
VIOX-CAN01 Setup
When you start connecting VTC device to CAN bus device, you need a
terminal program to send and receive data. To use the terminal program,
please follow the setting below.
(1) Set the proper corresponding “COM” port and its data rate is 9600
(2) Set data bits at 9, stop bit at 1 and no parity bits.
After the setting, you will see the prompt with “>” character. This indicates
that the device is in the idle state and ready to receive characters on the
COM port.
If you do not see prompt string, please reset the device with ATR (reset)
command and then press the return key:
>ATR or >AT R (spaces are optional; and case is in-sensetive).
You can also type HEX code instead:
“41”, “54”, “5A”, “0D”
If you see the strange characters instead of “>”, you may set the incorrect
baud rate. Please check baud rate. If you send the incorrect command, the
device will show a single question mark (“?”) to indicate your input is not
understood. If VTC fails to link to the BUS, it will show “PLEASE REBOOT”.
Once VTC connect to BUS, it will start to try which protocol is connected
either J1939 or J1708. Once it is determined, it will only accept the
successful protocol next time unless using ATR command to reset it. This
means you can change the protocol by reset command. After the reset
command, please power off the device and turn on it again.
In case, the device cannot find correct protocol after 180 seconds, it will
enter sleeping mode for power saving.
There are several output format available for the different application
including:
(1) Simple Data by ASCII Code
(2) Raw Data
(3) Packaged Messages by ASCII or HEX code.
The default setting is Simple Data Format. The device will send messages
out after it communicates with vehicle successfully. The output format can
be changed via setting the AT command. Please refer the following section
of AT command.