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O.S. engine EC-11 - Page 21

O.S. engine EC-11
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response format
throttle signal input from receiver
(fully close
fully open 0%
100%)
signal output to throttle servo
(fully close
fully open 0%
100%)
fuel trim signal input from receiver
(PWM signal pulse wide range)
communication protocol
20
size
data
range
1 byte
 
20h(32)
1 byte
02h
02h(2)
1 byte
”0”
30h(48)
status
item
start mark
 
20h(32
unit:
kPa
4byte ”8000””7FFF”
unit:
8000h
7FFFh
-32768
32767
-32768
32767
1 byte
 
20h(32
hPa
barometric pressure 4byte ”8000””7FFF”
8000h
7FFFh
fuel pressure
1 byte
8000h
7FFFh
-32768
32767
1 byte
 
20h(32
intake manifold air pressure
unit:
hPa
4byte ”8000””7FFF”
”8000”7FFF”
8000h
7FFFh
-32768
32767
1 byte
 
20h(32
unit:
hPa
intake manifold air pressure
4byte
(the value of negative pressure peak
when engines rotates once)
1 byte
 
20h(32
mV
1 byte
 
power supply (ECU internal 5V)
unit:
mV
8000h
7FFFh
-32768
32767
1 byte
intake air temperature
03h
03h
3
BCC
XOR from status to end mark
1 byte
1 byte
 
20h(32
1 byte
 
20h(32
unit:
μs
4byte
DATA
rpm
4byte ”8000””7FFF”
8000h
7FFFh
-32768
32767
unit:
mV
unit:
end mark
1 byte
1 byte
unit:
unit:
power supply (ECU internal 3.3V)
power supply (ECU internal 12V)
”8000”7FFF”
8000h
7FFFh
-32768
32767
”8000”7FFF”
8000h
7FFFh
”8000”7FFF”
8000h
7FFFh
-32768
32767
cylinder head temperature
”8000”7FFF”
8000h
7FFFh
-32768
32767
unit:
%
4byte
4byte
4byte
4byte
4byte
20h(32
1 byte
 
20h(32
engine rotation speed
-32768
32767
”8000”7FFF”
20h(32
4byte ”8000””7FFF”
8000h
7FFFh
-32768
32767
 
20h(32
 
20h(32
1 byte
 
unit:
%
4byte ”8000””7FFF”
8000h
7FFFh
-32768
32767
”8000”7FFF”
8000h
7FFFh
-32768
32767
unit: