Avalue Technology VMS-BYT, Quick Reference Manual

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Quick Reference Guide
VMS-BYT Quick Reference Guide 91
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J1708 Raw Data Protocol (HEX CODE)
This function will report all MID and PID that broadcasting on the J1708 network. Its data
length is not fixed, please refer to SAEJ1708.
Format PIDs 192-253 PIDs 128-191 PIDs 0-127
Byte 0 @ (= 0x40) @ (= 0x40) @ (= 0x40)
Byte 1
Message identification
(MID)
MID MID
Byte 4
Parameter
identification (PID)
PID PID
Byte 3 Number of data bytes Data1 Data1
Byte 4 Data1 Data2 Check Sum
Byte 5 Data2 Check Sum 0x0D
Byte 6
……..
0x0D 0x0A
Byte 7 Data N 0x0A
Byte 8 Check Sum
Byte 9 0x0D
Byte 10 0x0A
PIDs 0-127 describe data parameters that are one byte long.
PIDs 128-191 describe data parameters that consist of two bytes.
PIDs 192-253 The first byte following these PIDs will contain the number of
data parameter bytes.
0x40 0x80 0x15 0x01 0x32 0xC8 0x0D 0x0A
64 128 21 1 50 200 13 10
EX:
MID=128
PID=21 (Engine ECU temperature)
Data=50