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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
④
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
)
②
①
hPa
barometric pressure 4byte ”8000”~”7FFF”
8000h
~
7FFFh
fuel pressure
1 byte
8000h
~
7FFFh
(
-32768
~
32767
)
1 byte
”
 
”
20h(32
)
③
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
”
 
”
⑥
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
⑫
⑬
DATA
rpm
4byte ”8000”~”7FFF”
8000h
~
7FFFh
(
-32768
~
32767
)
unit:
mV
unit:
end mark
1 byte
1 byte
⑪
⑤
⑦
⑧
⑨
⑩
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: