Avalue Technology VMS-BYT Quick Reference Manual page 91

 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
Byte 0 @ (= 0x40)
Message identification
Byte 1
(MID)
Parameter
Byte 4
identification (PID)
Byte 3 Number of data bytes
Byte 4 Data1
Byte 5 Data2
........
Byte 6
Byte 7 Data N
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
64 128
EX:
MID=128
PID=21 (Engine ECU temperature)
Data=50
21 1 50
PIDs 128-191
@ (= 0x40)
MID
PID
Data1
Data2
Check Sum
0x0D
0x0A
0x0D 0x0A
200 13 10
VMS-BYT Quick Reference Guide 91
Quick Reference Guide
PIDs 0-127
@ (= 0x40)
MID
PID
Data1
Check Sum
0x0D
0x0A