B&B Electronics HVD100A3 manual J1708 Message Filter, Set Filter Active Byte Function Number Value

J1708 Message Filter

The J1708 message filter will operate on 4 different MID’s. Only messages with the same MID as set in the filter will be sent to the PC. The filters will be OR’ed together so that multiple MID’s can be filtered, MID1 or MID2 or MID3. The format for the setting of J1708 filtering is as follows:

Set Filter Active

Byte	Byte	Function
Number	Value
1	01	Start of frame
2	03	Control bytes
3	01	ID byte 1 = J1708 message
4	X9	Set filter 9 = Set filter active X = filter number 1 to 4
5	XX	Value of MID to filter On
6	00	Data bytes
7	CS	Checksum
Set Filter Off
Byte	Byte	Function
Number	Value
1	01	Start of frame
2	02	Control bytes
3	01	ID byte 1 = J1708 message
4	X8	Set filter 8 = Set filter inactive X = filter number 1 to 4
6	00	Data bytes
7	CS	Checksum

Setting all filters off will stop all data from the J1708 bus. When all filters are set off you must send the receive J1708 command to start receiving all bus messages.

16	HDV100A3 Command & Response Manual-1306cr
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