Bb-electronics Command Response Protocol HVD100A3 Manual de usuario descargar pdf (Pagina 20)

16 HDV100A3 Command & Response Manual-1306cr

B&B Electronics -- 707 Dayton Rd. -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5104

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

Number

Byte

Value

Function

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

Number

Byte

Value

Function

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.

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Bb-electronics Command Response Protocol HVD100A3 Manual de usuario Pagina 20