O.S. engine EC-11 Instruction Manual Download Page 19

Page: 19 / 28

《

communication specification

》

・

UART

・

TTL logic level

3.3V

・

Pin assignment (ECU side connector)

connector : JST 04R-JWPF-VSLE-S

・

protocol

《

communication procedure

》

ECU

1sec

ECU

BCC error

ECU

flow control

frame length

38400 bps

8 bit

none

1bit

none

changeable

time postpone

black

+5V power supply output

TXD

RXD

GND

communication protocol

・

The internal data of the ECU can be collected by other external devices through its serial

communication function. The communication protocal would show as followings.

red

white

green

response

BCC error

command

response

command

response

bit rate

data length

parity bit

stop bit

・

abnormal

（

command BCC error

）

・

abnormal (response postpone)

・

normal

・

abnormal

（

response BCC error

）

Summary of Contents for EC-11

Page 1: ...O S ENGINES MFG CO LTD Engine Control Unit for UAV Engines EC 11 With EC11 LINK INSTRUCTION MANUAL version 2 4E For GF40U FI 2020 02 01 ...

Page 2: ...U which contains a 32 bit CPU It collects the data of throttle opening rpm induction manifold pressure atomospheric pressure induced air temperature cylinder head temperature and run the engine in the most suitable condition The EC11 LINK software which enables to change the parameters and to monitor the data in real time in Windows platform is included as a standard accessory CAUTION After overha...

Page 3: ...he same time a buzzer sounds LED 1 LED 2 LED 3 Operation status LED Power LED On Power ON Off Power OFF On Off On 2 fuel pressure abnormal pressure low On Blink Off Off Off On Off LED3 engine stop On Off Off LED2 System error 1 Blink Off Blink Blink the followings are display LED message s meaning LED 1 LED2 LED3 engine start mode Off Off Blink Blink Blink On engine operation On Off Note 1 since t...

Page 4: ...perature sensor Cylinder head temperature sensor Manifold air pressure sensor Crankshaft rotation sensor A 5 CAN communication B wiring harness B Drive section CN2 B 1 Power supply DC10V 17V MAX 1 5A B 2 Fuel pump B 3 Ignition signal Throttle servo Injector C pump connection cord extendable C 1 fuel pressure sensor fuel pump unit 3 Configuration B A 1 B 1 A 2 A 3 A C TO FUEL PUMP UNIT FUEL SENSOR ...

Page 5: ...uel injection normally so correction signal from the outside is not necessary Leave it unconnected or connect 1520μs neutral PWM signal When pulling out during operation it holds the state just before Throttle signal input Specification Set the travel width so that the PWM signal width is 1100 μs or less on the throttle closed side and the PWM signal width is 1900 μs or more on the throttle openin...

Page 6: ...n drain Configuration A 4 To be connected to Crankshaft rotation sensor Power supply B 2 To be connected to Fuel pump via Pump connection cord Specification B Specification Injector A 5 Specification CAN communication Crankshaft rotation sensor Specification Throttle servo Specification B 3 To be connected to Throttle servo A B 1 Supply power B 3 To be connected to Injector harness 5 Fuel pump Spe...

Page 7: ...w Gray Brown White Stripe Configuration To be connected to Fuel pump A 3 Specification Specification C To be connected to A 3 Fuel pump B 2 Fuel pump Fuel pressure sensor C 1 C 1 B B 3 To be connected to the rotation signal input cable of Igniter To be connected to Fuel pressure sensor Specification Specification Ignition signal Specification To be connected to B 2 W GY G Y Wiring color R W B 6 BR...

Page 8: ... SERIAL SIGNAL CONVERTER Configuration It converts UART serial signal from ECU to RS232C serial signal Use the cable when you connect the ECU to a computer 7 ...

Page 9: ...e in case of using a converter from RS232C toUSB PREPARATION EC11 LINK EC11 LINK can be activated without connecting any sensors to the ECU For example in teaching of throttle positions you can activate the throttle servo as long as it is connected to the ECU Using EC11 LINK you can monitor the parameter data in real time and change the parameters After overhauling the engine after disconnecting t...

Page 10: ...PC The following window will open 9 OPERATION EC11 LINK CAUTION Do not turn on the ECU when the fuel tank is empty Operating the pump without fuel may damage the pump In case you need to turn on the ECU without fuel supply for example to rewright the settings by EC11 LINK disconnect the connector of the pump not to let the pump activate Thirty seconds after disconnecting the connector the buzzer r...

Page 11: ...ual of the Windows how to assign a COM port number Select the same COM port you have assigned from the pull down nenu Then click OPEN and the connection is completed OPERATION EC11 LINK The setting values are stored in the flash memory in the ECU and are read out in the memoty when the ECU is turned on When you change the setting values via EC11 LINK the new values are memorized in the momories at...

Page 12: ...k the connection between the ECU and the PC Now Open The serial port is open Click OK button and continue the operation Open Err2 It failed to acquire the serial port settings from the PC Check the connection between the ECU and the PC Open Err3 It failed the serial port setting in the PC Check the connection between the ECU and the PC Open Err10 The serial port is still closed Open the serial por...

Page 13: ...utton B11 After setting all the above parameters you must always click Save Settings button B12 to write the input data in the ECU memory into the flash memory Turning off the ECU without doing so causes loss of all the input parameters You can initialize the settings by clicking Initialize Setting button B13 to return to the default settings but when you initialize the settings you need to set Te...

Page 14: ... rpm at idling by airflow to the propeller created by the dive In this case the ECU closes the throttle valve excessively until the engine stalls trying to reduce the propeller rpm If it happens add 5μs to the parameter also In case the idling rpm doesn t decrease to the value you set in the prosess even if temperature of the engine goes over 100 reduce the value by 5μs each time until the rpm dec...

Page 15: ...ode is released The parameter is usually 50 revolutions Increasing fuel injection according to the rise of Cylinder Head temperature CHT This is the function to stabilize engine operation at low temperature and prevent the engine from overheating at high temperature The parameter can be input at 16 points by 20 interval between 0 300 The parameter shows how much extra fuel is added to the basic fu...

Page 16: ...etting items are the Teaching processes of throttle position Do not change the parameters except for unless it is needed The engine performance might get worse Settings of input side of throttle signal is adjusted using the following MONITOR function Opening of throttle valve is affected by the setting of throttle servo position Set throttle signal input after Teaching processes OPERATION EC11 LIN...

Page 17: ...V power supply line of the ECU 6 5V voltage mV Voltage of 5v power source line in the ECU 7 12V voltage mV Voltage of the 12V power supply line of the ECU Press MONITOR button with the ECU connected to the PC and you can monitor the updated information in the ECU To exit the MONITOR mode click Mon Stop button MONITOR is switched to Mon Stop during the MONITOR mode OPERATION EC11 LINK 16 Peak press...

Page 18: ... the travel amount end point of throttle signal input from the receiver or the flight controller referring to the value on the monitor The end points of throttle fully open and fully closed positions are to be set 0 and 100 or 1 and 101 with some torelance signals 0 or less and 100 or more are recognized as 0 and 100 respectively The signal output to the throttle servo how much throttle is open is...

Page 19: ...geable time postpone black 5V power supply output TXD RXD GND communication protocol The internal data of the ECU can be collected by other external devices through its serial communication function The communication protocal would show as followings red white green response BCC error command response command command command response bit rate data length parity bit stop bit abnormal command BCC er...

Page 20: ...munication protocol 19 communication format command format end mark BCC XOR from command to end mark size 1 byte 3 byte 1 byte 1 byte range 02h 2 4Dh 4Fh 52h 03h 3 item data 02h MOR 03h start mark command ...

Page 21: ... 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 ...

Page 22: ...eld CRC Field NAME ID DATA LENGTH DATA 0 7 DATA RANGE 0 5 6 7 769 0x0301 8 0x000000000000 DATA Negative pressure hPa 770 0x0302 Pressure hPa 768 0x0300 8 0x000000000000 DATA 8 0x000000000000 DATA Negative pressure peak hPa 771 0x0303 8 0x000000000000 DATA 8 0x000000000000 DATA Head temperature 775 0x0307 8 0x000000000000 DATA 12V voltage mV 774 0x0306 Throttle signal input 777 0x0309 8 0x000000000...

Page 23: ...t delete the CAN setting_xxxx exe file communication protocol Connect the serial signal converter to the Serial Communication Connector A 2 of the ECU Connect the D sub connector of the serial signal converter to the RS232C serial port of the PC or to the serial port of the RS232 to USB converter 22 CAUTION Do not turn on the ECU when the fuel tank is empty Operating the pump without fuel may dama...

Page 24: ...lect the confirmed COM port from the pull down menu in the above picture Click the COM OPEN button in the above picture and the connection is completed In the pull down menu of you can see what kind of connection USB serial port in this sample below next to port number COM3 in this case You can make a choice from the pull down menu In case you cannot find a connection click Search again But some k...

Page 25: ...unit mm dimension 24 ...

Page 26: ...xternal output GND Crankshaft rotation sensor 5V Crankshaft rotation sensor SIGNAL Crankshaft rotation sensor GND Fuel pressure sensor 5V Fuel pressure sensor SIGNAL Fuel pressure sensor GND GND Manifold air pressure sensor 5V Manifold air pressure sensor SIGNAL Manifold air pressure sensor GND Intake air temperature sensor Intake air temperature sensor Cylinder head temperature sensor Cylinder he...

Page 27: ... 12V Throttle servo SIGNAL Throttle servo Power supply DC 5V Power supply DC 5V Expansion Throttle servo GND External output GND Expansion External output Digital 0 5V Expansion Power supply DC10 17V MAX1 5A Power supply DC10 17V MAX1 5A Power supply GND Power supply GND 16 15 1 9 2 10 3 11 7 8 4 12 5 13 6 14 Not connected except to enclose with pin assignment 26 1 8 9 16 ...

Page 28: ...MEMO 27 ...

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