Avalue Technology VMS-BYT, Quick Reference Manual

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VMS-BYT
88 VMS-BYT Quick Reference Guide

Simple Data Protocol: (HEX CODE)
Data Description
HEAD @ (=0x40)
Byte 1 Speed , (0~255) km/h
Byte 2 RPM High Byte (RPMHB)
Byte 3 RPM Low Byte(RPMLB), RPM=RPMHB*256+RPMLB
Byte 4 Engine Loading, (0~100%)
Byte 5 Battery Voltage (BV), = (BV+100)/10 (V)
Byte 6
Engine Temperature( ET), =ET-40 (
℃
)
Byte 7 Throttle position 0~100 %
Byte 8 Status, Note 2
Byte 9 MAF (0~255), MAF RATE= MAF * 300 (g/s)
Byte 10 Distance: D1
Byte 11 Distance: D2, Distance = D1*256+D2(KM)
Byte 12 FU, Average Fuel Economy (km/L) =Fu /10
Byte 13
Check sum (add numbers)= Byte1+ Byte2+Byte3+ Byte4+
Byte5+Byte6+ Byte7+ Byte8+Byte9+ Byte12
Byte 14 Carry return (0x0D)
Byte 15 Line feed (0x0A)
NOTE:
1.) Data format : ASCII CODE
@ , 7 8 , 0 E , 7 0 , 0 0 ,0 3 , 9 8 , 2 8 , Status ,MAF , D1,D2,Fu,CS
Speed=120 km/hr (78
Hex
=120
Dec
)
Rpm=0x0E70= 3696 (0E70
Hex
=3696
Dec
)
2.)
status:
Bit 7:
0: Normal
1: Emergency Braking (Acceleration < -6 m/ s
2
)
Bit 6:
0: Brake OFF
1: Brake ON
1: Brake
Bit 5:
0: Clutch OFF