Master Relay
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User’s Manual
13
Device Configuration
Changing the base CAN Identifier
The default base CAN address is 0x6E4, can be changed using any CAN bus interface device
capable of transmitting a message onto the CAN bus. The following procedure changes the
CAN identifier on the Master Relay:
1.
Configure the CAN interface device to transmit a single message on address 0x789
with the following format:
Table 10: Example CAN ID configuration message
Byte
0
1
2
3
4
5
6
7
Data
0x07 0x89 CAN_ID
CAN_ID 0x07 0x89
Example*
0x07 0x89 0x06 0xE4 0x06 0xE4 0x07 0x89
* shows the correct message format to change the address to 0x6E4
Where ‘CAN_ID’ is the desired new CAN
address in big endian format (MSB first).
Please note that the CAN address must not exceed a length of 11 bits (0x000 to
0x7FF), and must not conflict with any other CAN devices on the network.
2.
Press and hold the external kill switch while sending the above message.
3.
The Master Relay will send a response message on the base CAN address. See
Table 11 for a list of responses.
Table 11: Responses for CAN ID configuration
0
1
2
3
4
5
6
7
Successful
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
IDs do not match
0x11 0x11 0x11 0x11 0x11 0x11 0x11 0x11
Frame check error
0x22 0x22 0x22 0x22 0x22 0x22 0x22 0x22
Invalid ID
0x33 0x33 0x33 0x33 0x33 0x33 0x33 0x33
4.
After a successful response the Master Relay will be configured to send all CAN
information on the new base address.
