Diesel Engine for Generators

Digital Speed Controller

User Manual
(DSC-1000)
Ver_1.0

Doosan Infracore

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Contents

1. Product Overview and General Specification

1.1 Product Information
1.2 Product Appearance
1.3 Product Specification
1.4 Product System Diagram
1.5 Product I/O Signals
1.6 Product Dimension

2. Installation
2.1 Connecting to the Engine
2.1.1 Battery, Pick-up, Actuator Connection Diagram
2.1.2 Connecting to Batteries
2.1.3 Connecting to Actuators
2.1.4 Connecting to Pick-up Sensors
2.1.5 Operating Sequence for Digital Speed Controller
2.2 Connecting to Speed Trim, Droop, Idle and Other Inputs
2.2.1 Speed Trim, Droop, Idle and Other Inputs Diagram
2.2.2 Connecting to Speed Trim
2.2.3 Connecting to Droop
2.2.4 Connecting to Idle
2.2.5 Connecting to AUX
2.2.6 Connecting Power to External Devices
2.3 Connecting to Crank, Run, Over Speed and Communication
2.3.1 Crank, Run, Over Speed and Communication Connection Diagram
2.3.2 Connecting to Crank Terminals
2.3.3 Connecting to Run Terminals
2.3.4 Connecting to Over Speed Terminals
2.3.5 Connecting to CAN Communication
2.3.6 Connecting to RS232 Communication

3. Configuration and Operation

3.1 Input Keys
3.2 LCD Display Menu
3.2.1 LCD Displays After Powered On
3.2.2 LCD Main Menu Display
3.2.3 Engine Type Setup Menu
3.2.4 System Setup Menu

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 3.2.5 PID Gain Setup Menu
3.2.6 PID Auto Setup Menu
3.2.7 DateTime Setup Menu
3.2.8 Alarm List Menu
3.2.9 Default Setup Menu
3.2.10 System Info Menu
3.3 Engine Configuration
3.3.1 Engine Type Configuration
3.3.2 System Setup Configuration
3.3.3 PID Gain Setup Configuration
3.3.4 PID Auto Setup Configuration
3.3.5 DateTime Setup Configuration
3.3.6 Alarm List

3.3.7 Actuator Test

3.3.8 Default Setup Functions
3.3.9 System Info Functions
3.3.10 LCD Setup Function Configuration
3.3.11 System Monitor Function Configuration

4. How to Operate
4.1 Operating Sequence for Digital Speed Controller
4.2 Detailed Operating Sequence

5. Troubleshooting
5.1 Alarm List Check
5.2 System Checks and Measures

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1. Product Overview and General Specification

1.1 Product Information

Digital Speed Controller (DSC-1000) is applicable to generator (vehicles and vessels) engines as a high
performance embedded electronic control system designed based on PID control for fast and precise
control of engine speed with an enhanced micro controller unit (MCU) that minimizes analog circuits
vulnerable to user environments.

This product features PID auto setting functions along with battery voltage, pick-up sensors and
actuator condition checking. It also has a black box function that manages engine operation records
when faults are detected for users to have more convenience in operating this precise digital speed
controller.

[Product Features]
● Rigid and stable case structure and easily recognizable front design
● Readily understandable GUI (graphic user interface) with graphic LCD displays
● Easy and simple setup with 8 button keys without manual controls by users
● Fast setting available by migrating initial settings depending on types of the engines
● Listing fault messages (over speed, pick-up error, etc.) and recording messages
● RS232 and CAN ports available for communication
● Digital inputs and PID auto setup functions for PID control parameters
● Application of digital clock for fault timing and engine operating hours

1.2 Product Appearance

Digital Speed Controller is made of a rigid aluminum case taking into account anti-shock,
electromagnetic resistance and environmental protection. An embedded system containing graphic LCD
and high performance MCU is inside the controller and a heat sink is located on the outside of the
case for protection and precise control of actuator operating elements.

A terminal block is located on the bottom and right of the front side for easy connection to external
devices. Over speed, run and crank signals are displayed on the front LED and contact points (a or b)
are also available for outputs on external controllers or indicators.

RS232 and CAN communication is available and DSUB-9 connector enables universal use of RS232
communication.

Users can easily input and adjust values for parameter inputs using 8 button keys. In addition, graphic
LCD shows graphic displays, bar graphs and design symbols so that users can readily identify the
control information while external LED displays important conditions of the engine.

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 Figure 1: Product Front View

Product Specification
No. Item Description
1 MCU 16-bit DSC dsPIC33FJ256
Graphic LCD 128*64
2 Display
LED: 6 EA
3 Keypad 8 Button Keys
4 Output 3 Contact Points (a and b)
5 Input RMS 3V (Min)
6 Memory 128Mb
RS232 57600bps
7 Communication
CAN (J1939) / 250kbps
8 Rated Power DC 24V (12V to 30V)
9 Current Consumption 120mA
10 Operating Temperature -20 to +70℃
11 Storing Temperature -30 to +80℃
12 Operating Humidity 0 to 95%

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1.3 Product System Diagram

Figure 2: System Diagram for Digital Speed Controller

1.4 Product I/O Signals

No Terminal I/O type Terminal Functions

Outputs are actuator control signals.
Actuator
1 Output Wiring should be 18AWG (105℃) or better. (However, terminals A and
( A, B )
B can be used regardless of their polarities)
Inputs are RPM sensor signals.
Terminal D should be connected to the ground in connection with the
Pick-Up
2 Input shield cable. Gap between the RPM sensor and the gear tooth should
( C, D )
be adjusted between 0.9 and 1.1mm (sensor inputs should be at least
3V AC RMS).

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 It is a power input terminal for the controller and inputs are DC
Battery
+24V/15A.
3 Voltage Input
The positive pole of the battery should be connected to the terminal
(-E, +F)
F. (Back voltage protection circuit is built in.)
It has a ground signal and is connected to the ground of the
4 Input (G)
potentiometer.
Speed Trim
Inputs are RPM trim signal values and the voltage level is between 0
5 (G, H, J) Input (H)
and 5V. It is connected to the output of the potentiometer.
6 Input (J) Outputs are DC +5V and it is connected to VCC of the potentiometer.
Terminal K receives droop function selecting information.
Droop Terminal L has a ground signal and the switch is connected to
7 Input
( K, L ) terminals K and L. Once the terminal K is connected to the ground,
droop starts to operate.
Idle Terminal M receives idle function selection signals. Once it is
8 Input
(M) connected to the ground, idle operation starts.
Terminal N receive load sharing and synchronization signal for parallel
AUX
9 Input operation.
(N)
The signal level is an input between DC -5 and +5V.
10V Outputs are +10V/20mA ratings and it can be used for various
10 Output
(P) purposes including power to external auxiliary devices.
The second crank contact point is a shared terminal while terminals 1
Crank and 2 are for the contract point b and terminals 2 and 3 for the
11 Contact Point Output contact point a. The contact point a starts to operate when the digital
(1, 2, 3) speed controller reaches at the RPM delivering control signals to the
actuator after the engine is activated.
The fifth run contact point is a shared terminal while terminals 4 and
Run Contact 5 are for the contact point b and terminals 5 and 6 for the contact
12 Output
Point (4, 5, 6) point a. The contact point a starts to operate when the engine
reaches its designated normal speed RPM.
The eighth over speed contact point is a shared terminal while
Over Speed
terminals 7 and 8 are for the contact point b and terminals 8 and 9
13 Contact Point Output
for the contact point a. The contact point a starts to operate when
(7, 8, 9)
the engine reaches its designated over speed RPM.
CAN Terminal 10 is for CAN-L communication and 11 is for CAN-H
14 I/O
( 10, 11 ) communication. CAN-H and CAN-L are used for CAN communication.
Power When DC+24V power is supplied to the controller, the LED turns on
15 Output
LED in red on the power level.
Pick-Up When the controller receives normal input signals from the pick-up
16 Output
LED sensor, the LED turns on in red on the pick-up level.

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 The 2- and 3-terminal contact point a starts to operate and the LED
turns on in red on the crank level when the digital speed controller
17 Crank LED Output
reaches at the RPM delivering control signals to the actuator after the
engine is activated.
The LED turns on in red on the run level when the engine reaches its
18 Run LED Output designated normal speed RPM with 5- and 6-terminal contact point a
starting to operate.
The LED turns on in red on the over speed level when the engine
Over Speed
19 Output reaches its designated over speed RPM with 8- and 9-terminal
LED
contact point a starting to operate..
The LED turns on in red on the error level when abnormal events of
20 Error LED Output
the controller occur.
D-SUB 9PIN (male) is connected to the host through RS232
21 RS232 I/O
communication port.
The GND part and the ground should be earthed in shared
22 Ground Ground
connection.

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1.5 Product Dimension

2. Installation
Digital Speed Controller should be connected to the pick-up sensor attached on the engine and the
actuator. Speed trim, droop, idle and aux terminals can be used for additional functions in connection
with surrounding circuits. Contact points a or b can also be used to operate external devices using crank,
run and over speed functions. RS232 and CAN port allow communication with PCs or external host
computers for data transfer and monitoring functions.

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2.1 Connecting to the Engine
2.1.1 Battery, Pick-Up and Actuator Connection Diagram

Figure 3: Battery, Pick-Up and Actuator Connection Diagram

2.1.2 Connecting to Batteries

Battery voltage is DC +24V and the battery is connected to the controller matching E (-) and F (+)
with the respective polarities of the battery. E (-) is connected to (-) of the battery and F (+) to (+) of
the battery. Depending on cases, wiring can be done in a serial connection to the contact point a of
MC and the fuse (DC +24V/15A) when connecting to system panels or generator control devices.

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2.1.3 Connecting to Actuators
The actuator is also called governor and controls the amount of the fuel spray to the engine cylinder.
The controller is connected to the actuator attached on the engine by connecting two wires of the
controller terminal to A and B of the actuator regardless of their polarities. Wiring should be 18AWG
(105℃) or better and the outside should be wrapped by plastic tubes for insulation or insulated mesh
lines.

2.1.4 Connecting to Pick-Up Sensors

The pick-up sensor lets users know the engine speed and is connected to terminals C and D that can
receive signals of AC RMS 3V or higher. Wiring should be twisted or shielded cables connected to the
ground together with the terminal D. Gap between the pick-up sensor and the gear tooth should be
adjusted between 0.9 and 1.1mm.

2.1.5 Operating Sequence for Digital Speed Controller

● Power On/Off: It means that DC +24V power is either supplied or terminated through E (-) and F (+)
of the battery matching with their respective polarities.
● LCD On/Off: It means to turn on or off the LCD display alone while DC +24V power is supplied
through E (-) and F (+) of the battery matching with their respective polarities and the controller is in
operation.

[Operating Sequence for the Controller]

Step1) When DC +24V power is supplied to the controller, the controller starts to operate. It indicates
that power LED turns on and the power is being normally supplied.
Step2) Inputs for speed trim, droop and idle functions are received.
Step3) The controller checks the signals of the speed pick-up sensor.
Step4) Actuator control signals are output together with designated values of other information for
crank, run and over speed functions according to the PID control values.
Step5) The controller checks the operation condition and displays LED outputs and fault messages
according to the detected information.

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 Figure 4: Time Chart for Operation of the Controller

2.2 Connecting to Speed Trim, Droop, Idle and Other Inputs

2.2.1 Speed Trim, Droop, Idle and Other Inputs Diagram

Figure 5: Speed Trim, Droop, Idle and Other Inputs Diagram

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2.2.2 Connecting to Speed Trim
Speed trim is an analog voltage signal port for input to fine-tune the engine speed. A potentiometer
is used for precise adjustment of the resistance values. The potentiometer needs to be connected to
terminals G, H and J. Terminal G should be connected to the ground and it is recommended to use
shielded cables. Terminal H is connected to G depending on the current consumption of the actuator
(for actuators with 5A or higher). J is an input terminal for fine-tuned voltage values between 0 to 5V.

2.2.3 Connecting to Droop

The switch is connected to terminals K and L. Signals indicating whether droop function works or not
serve as inputs to the controller by keeping K and L either open or close. Inputs can be done by toggle
or converting switches.

2.2.4 Connecting to Idle

The port on one side of the switch is connected to terminal M and the port on the other side to the
ground. Connection between terminal M and the ground becomes either open or close by keeping the
switch open or close. When connection between the terminal and the ground becomes close, the
controller will have idle function. Inputs can be done by toggle or converting switches.

2.2.5 Connecting to AUX

AUX is a terminal for control signal inputs from load sharing devices or synchronization devices
through terminal N. It shares load from the generator in parallel operation and receives signal inputs from
synchronization devices for the controller to control changes to load. Input signal level is between DC -5
and 5V and it is recommended to use shielded cables for signal wires.

2.2.6 Connecting Power to External Devices

It can supply power output of 10V/20mA to external devices through terminal P. Users can easily use
this terminal when external auxiliary devices need power supply.
However, power supply of 20mA or higher should not be used and care should be given to prevent
short circuits.

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2.3 Connecting to Crank, Run, Over Speed and Communication

2.3.1 Crank, Run, Over Speed and Communication Connection Diagram

Figure 6: Crank, Run, Over Speed and Communication Connection Diagram

It is used to deliver operation information to external devices by activating contact point (a or b) when
activating crank, run or over speed functions.
RS232 and CAN communication is connected to external PCs or hosts so that the controller can
transmit system settings or operation information.

2.3.2 Connecting to Crank Terminals

Terminals 1, 2 and 3 are the ones for crank output contact point and the contact point will be in
operation when the controller activates the crank function. The second crank contact point is a shared
terminal while terminals 1 and 2 are for the contact point b and terminals 2 and 3 for the contact point a.
Contact points a and b start to operate when the controller reaches at the RPM delivering control

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signals to the actuator after the engine is activated. The diagram shows wiring to operate AC220V lamp.
The shared terminal is for 220V inputs and the crank lamp turns on when the contact point a starts to
operate.

2.3.3 Connecting to Run Terminals

Terminals 4, 5 and 6 are the ones for run output contact point and the contact point will be in
operation when the controller activates the run function. The fifth crank contact point is a shared terminal
while terminals 4 and 5 are for the contact point b and terminals 5 and 6 for the contact point a.
Contact points a and b start to operate when the engine reaches its designated normal speed RPM. The
diagram shows wiring to operate AC220V lamp. The shared terminal is for 220V inputs the run lamp turns
on when the contact point a starts to operate.

2.3.4 Connecting to Over Speed

Terminals 7, 8 and 9 are the ones for over speed output contact point and the contact point will be in
operation when the controller activates the over speed function. The eighth over speed contact point is a
shared terminal while terminals 7 and 8 are for the contact point b and terminals 8 and 9 for the contact
point a.
Contact points a and b start to operate when the engine reaches its designated over speed RPM. The
diagram shows wiring to operate AC220V lamp. The shared terminal is for 220V inputs the over speed
lamp turns on when the contact point a starts to operate.

2.3.5 Connecting to CAN Communication

Terminal 10 is for CAN-L communication and terminal 11 for CAN-H communication. CAN-H and
CAN-L are used for CAN communication with remote control and monitoring of the controller operation.
The communication code is based on J1939.

2.3.6 Connecting to RS232 Communication

D-SUB 9pin (female) is for RS232 communication for connection to external PCs or hosts. It can
configure system parameters of the controller or communicate with analytic applications.

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3. Configuration and Operation
The controller can be configured and operated by input keys according to the menus on the LCD
display by selecting proper ones and assigning values in the selected menu to input control information
to the system. Input information should immediately apply to the controller system once updated.

3.1 Input Keys

The controller has 8 input keys including LCD, Mode, Menu, Enter, Up, Down, Left and Right.

Each key as respective functions as follows:

LCD LCD key turns on and off the display.

Mode Mode key switches the display to either operation mode or wave form display.

Menu Menu key lets users change the menu display and go back to the previous menu.

Enter Enter key applies designated values on the LCD display to the system.

Up key lets users go up or increase values in the selected menu on the LCD display.

Down key lets users go down or decrease values in the selected menu on the display.

Left key lets users move to the left in the selected menu.

Right key lets users move to the right in the selected menu.

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3.2 LCD Display Menu
The overall menu tree of the controller is as follows:

Figure 7: Overall LCD Menu Tree Diagram

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3.2.1 LCD Displays After Powered On
When DC +24V power is supplied to the battery terminal (E (-), F (+)) of the controller, the power
LED in the front side of the controller turns on in red and the error LED turns on in red where there
are fault conditions. At this moment, the LCD display is not activated and Doosan logo will appear for 1
second followed by the operation display after pressing the LCD button.
The controller will start control based on information from pick-up sensor and other input devices
and designated parameter values. At this moment, where breakdowns of the surrounding devices or
system errors occur, the LCD display will show such errors and processing messages.

Step 1) DC +24V power supply to the terminals E (-) and F (+)

When DC +24V power is supplied to the terminals E (-) and F (+), the controller will start to operate
with the LCD display off. After pressing the LCD button, Doosan logo will appear for 1 second as shown
below followed by the controller operation display. Then, the LCD display will switch between on and
off by pressing the LCD button.

Figure 8: Doosan Logo

Step 2) The operation display will show 1 second after the logo appears.

Droop IDLE
TRIM AUX

Displays year and time

Displays the remaining
fuel of the actuator
Displays set RPM

Displays the operation

hours while the system
is on

Displays operating RPM

Figure 9: Operation Display

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3.2.2 LCD Main Menu Display

Displays main menu screen of the controller

The main menu of the controller has 10 sub-menus.

Menu 1: Main Menu of the Controller - 1 to 2

1) Engine type
The controller can start operation once the initial system values are configured.
Users can load preset values depending on types of the engines by selecting the type.
2) System setup
It consists of sub-menus related to system settings including
RUN/IDLE/OVERSPEED/CRANK/GEARNUMBER.
3) PID gain setup
It consists of sub-menus to designate Kp, Ki and Kd parameter values related to the engine PID
control.
4) PID auto setup
It offers function for automatic designation of Kp, Ki and Kd parameter values related to the
engine PID control.
5) DateTime setup
It offers function for users to move to the screen for designating year, month, day and hour.
6) Alarm list
It offers function for users to move to the alarm display for the alarm list.
7) Actuator Test
It offers menu to test the impedance (XL) of the actuator and any problems in operating load
current. It displays current and voltage according to the duty values.
8) Default setup
It offers menu to apply designated default values to the selected engine.
9) System info
It offers menu that shows information of the controller. Such information includes the serial
number, software version, last update date, alarm count and engine runs.
10) LCD setup
It offers menu to configure LCD operating conditions including brightness, auto on/off and off
hours.
11) System monitor

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 It offers menu to monitor the controller operation. It shows values for Engine RPM, Valve Duty,
Valve Current, Aux RPM Input, Pickup Voltage and Bat Voltage.

3.2.3 Engine Type Setup Menu

This menu offers function to configure setting values of the controller depending on types of the
engines in advance and apply such preset values to the selected engine.

Menu 2: Engine Type Selection Menu

3.2.4 System Setup Menu

System Setup Menu Display of the Controller

It consists of sub-menus for the system configuration items of the controller including the one for
configuring RUN/IDLE/OVERSPEED/CRANK/GEAR NUMBER related to RPM setting. Depending on
additional functions, users can designate values for STARTING FUEL/SPEED RAMPING/ACTUATOR
MAX/LOW BATTERY.

Menu 3: System Setup Menu - 1 to 3

1) SET RUN RPM

Users can designate normal speed (target RPM) of the engine.
Users need to input different normal speed values depending on the specification of the
selected engine.
2) SET IDLE RPM
Users can designate the idle speed values of the engine as RPM.
Users need to input values to control the idle operating speed of the engine.
3) SET OVER SPEED
Users can designate RPM values to activate engine protection function when the speed exceeds
the normal level (target RPM) and reaches the overspeed range that may cause problems to the
engine.

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 When the engine RPM reaches the over speed RPM range, the engine immediately stops with
error messages and alarms.
4) CRANKING RPM
Users can designate RPM values to activate the actuator when the engine starts to operate.
5) GEAR NUMBER
Users can input the number of flywheel teeth in the engine to the controller so that the
controller can calculate the accurate RPM depending on the values of the pick-up sensor from
the engine.
6) STARTING FUEL
Users can designate the amount of fuels used when the engine starts to operate and the
operating current for the controller to activate the actuator changes based on these values.
7) AUX SPEED
Users can adjust values to ensure safe operation of the engine based on the AUX signal values
when AUX is enabled.
8) SPEED RAMPING
Users can input ratio values of speed changes when the speed increases or decreases in the idle
condition of the engine.
9) MAX CURRENT
Users can designate the maximum operating current for the actuator of the engine.
10) LOW BATTERY
It measures the battery voltage supplied to the controller. When the measured values are lower
than the present voltage values, it will be alarmed. Usually, the acceptable battery voltage is
between 20 and 22V (without load).
11) DROOP GAIN
Users can designate the droop values applicable to maximum load based on the current
consumption of the actuator.
12) F-LOAD CURR
Users can designate the maximum current values when the generator is in full load.
13) N-LOAD CURR
Users can designate the operating current values of the actuator when the generator has no load.

3.2.5 PID Gain Setup Menu

Users can input Kp, Ki and Kd values as inputs to the PID control of the engine. Kp means
proportional values while Ki means integral of the proportional values and Kd means differential of the
proportional values.

Menu 4: PID Gain Setup Menu

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3.2.6 PID Auto Setup Menu
The menu offers function for automatic designation of the P, I and D parameter values related to
the engine PID control.
After starting the engine, select DRIVE UNIT MENU in the main menu while the engine has no load
and then PID auto setup menu, press Enter. Then, the system message shows “Auto Setup Mode PID
setting?” with YES or NO option. If you select YES, the controller will repeatedly change the RPM to
automatically calculate the optimized P, I and D values.
If the controller identifies the optimized P, I and D values within 30 cycles, it will display “PID Auto
Setup Complete, OK”. When you press Enter, it will apply tuned P, I and D values and close the menu.
If the controller fails to identify the optimized P, I and D values within 30 cycles, it will display “PID
No Successful, OK”. When you press Enter, it will apply the final P, I and D values and close the menu.

Menu 5: PID auto setup menu

3.2.7 Date/Time Setup Menu

Users can designate year, month, day, hour and minute for the controller and the designated time
will be used to monitor the system and manage fault messages.

Menu 6: DATE/TIME SETUP Menu

3.2.8 Alarm List Menu

This menu displays year, month, day, hour and minute for the errors in the controller and types of the
faults in codes which are used in troubleshooting.

Menu 7: ALARM LIST Menu

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3.2.9 Default Setup Menu
When you cannot identify the type of the control engine by the controller, this menu offers the most
common parameter setting values. For default setup, select YES and then press Enter button. If you
don’t want to implement this function, press No button.
If you press YES, all the configuration values will be changed to the default ones of the engine.

Menu 8: Default Setup Menu

3.2.10 System Info Menu

The controller displays its information including the serial number, software version, last update date,
alarm count and engine runs.

Menu 9: System Info Menu

3.3 Engine Configuration

3.3.1 Engine Type Configuration
Users can store control setting information depending on types of the engines in the internal
memory of the controller. If you select your engine type, applicable parameters will be automatically
configured accordingly. This feature is available for 16 different types of engines.

Designated Parameters by Engine Type

No Menu Name Gear Starting
Run RPM Over Speed PID Value
Teeth Fuel
1 DB58 1500RPM (50Hz) 129T 1500RPM 1725RPM 129 65% Optimal Value
2 DB58 1800RPM (60Hz) 129T 1800RPM 2070RPM 129 65% Optimal Value
3 DE08 1500RPM (50Hz) 102T 1500RPM 1725RPM 102 65% Optimal Value
4 DE08 1800RPM (60Hz) 102T 1800RPM 2070RPM 102 65% Optimal Value
5 DE08 1500RPM (50Hz) 140T 1500RPM 1725RPM 140 65% Optimal Value
6 DE08 1800RPM (60Hz) 140T 1800RPM 2070RPM 140 65% Optimal Value
7 DE08 1500RPM (50Hz) 146T 1500RPM 1725RPM 146 65% Optimal Value
8 DE08 1800RPM (60Hz) 146T 1800RPM 2070RPM 146 65% Optimal Value

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9 DL11 1500RPM (50Hz) 152T 1500RPM 1725RPM 152 65% Optimal Value
10 DL11 1800RPM (60Hz) 152T 1800RPM 2070RPM 152 65% Optimal Value
11 DV15 1500RPM (50Hz) 160T 1500RPM 1725RPM 160 65% Optimal Value
12 DV15 1800RPM (60Hz) 160T 1800RPM 2070RPM 160 65% Optimal Value
13 DV18 1500RPM (50Hz) 160T 1500RPM 1725RPM 160 65% Optimal Value
14 DV18 1800RPM (60Hz) 160T 1800RPM 2070RPM 160 65% Optimal Value
15 DV22 1500RPM (50Hz) 160T 1500RPM 1725RPM 160 65% Optimal Value
16 DV22 1800RPM (60Hz) 160T 1800RPM 2070RPM 160 65% Optimal Value

Table 1: Configuration Values by Engine Type

 Engine Configuration Procedure

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select Engine Type by using Up and Down buttons in DRIVE UNIT MENU and then press
Enter button.

Step3) Go to Engine Type menu and select your engine type using Up and Down buttons. Then,
press Enter button. At this moment, setting values according to the selected type of the engine are
designated and will be used as information for the controller to control the actuator.

Menu 10: Selection List by Engine Type

3.3.2 System Setup Configuration

Main setting items of the controller includes GEAR NUMBER, CRANKING RPM and SET RUN RPM.
You need to designate setting values to these items. Other system setup items are optional and
therefore you can designate values for those items as necessary.

 Configuring SET RUN RPM

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select SET RUN RPM in SYSTEM SETUP menu and then press Enter button. Use Up and
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 Down buttons to increase or decrease the normal operating speed of the engine and then press
Enter button.

 Configuring SET IDLE RPM

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select SET IDLE RPM in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the idle operating speed of the engine and then press
Enter button.

 Configuring SET OVER SPEED

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select SET OVER SPEED in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the over speed values of the engine and then press Enter
button.

 Configuring CRANKING RPM

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.

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 Step3) Select CRANKING RPM in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the RPM values at which the controller starts to control the
actuator when the engine starts to operate and then press Enter button.

 Configuring GEAR NUMBER

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select GEAR NUMBER in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the number of gear teeth in the engine and then press Enter
button.

 Configuring STARTING FUEL

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select STARTING FUEL in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the percentage for the amount of fuel sprayed when
the engine starts and then press Enter button.

 Configuring SPEED RAMPING

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.

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 Step3) Select SPEED RAMPING in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the ratio of changes to the speed when increasing
from the idle speed or decreasing from the increased speed and then press Enter button.

 Configuring MAX CURRENT

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select MAX CURRENT in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the limit of the maximum current consumption of the
actuator and then press Enter button (Max. 10A).

 Configuring LOW BATTERY

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select LOW BATTERY in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to input voltage values at which low battery alarms are activated and then
press Enter button.

 Configuring DROOP GAIN

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons

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 and then press Enter button.
Step3) Select DROOP GAIN in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to increase or decrease the RPM values with adjusted ratio to decrease at the
maximum load when the generator is in parallel operation and then press Enter button.

DROOP Function
Droop function is indicated in percentages as follows: RPM with no load is subtracted by RPM with
maximum load and then divided by RPM with no load.

RPM with no load − RPM with maximum load

𝐃𝐫𝐨𝐨𝐩% =
RPM with no load

(Example for 3% Droop)

Assuming that RPM with no load is 1,800 and RPM with maximum load is 1,854 then the
percentage will be 3%. It means that the generator output will be changed by 33.3% as the
frequency changes by 1% due to the actuator control.

Figure 1: 3% Droop

(Example for 7% Droop)

Assuming that RPM with no load is 1,800 and RPM with maximum load is 1,926 then the percentage
will be 5%. It means that the generator output will be changed by 14.3% as the frequency changes
by 1% due to the actuator control.

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 Figure 2: 7% Droop

 F-LOAD CURR.
Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select F-LOAD CURR. in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to input the maximum current values of the actuator for the generator with
full load and then press Enter button.

 N-LOAD CURR.
Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU.
Step2) Select System setup menu in DRIVE UNIT MENU using Up, Down, Left and Right buttons
and then press Enter button.
Step3) Select N-LOAD CURR. in SYSTEM SETUP menu and then press Enter button. Use Up and
Down buttons to input the operating current values of the actuator for the generator with
no load and then press Enter button.

3.3.3 PID Gain Setup Configuration

 Configuring PID Gain Kp, Ki and Kd Values
Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,

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 Down, Left and Right buttons to select PID gain setup menu and then press Enter button.
Step2) Use Up and Down buttons in PID GAIN SETUP to select PROPORTIONAL, INTEGRAL or
DERIVATIVE and then press Enter button.

 Configuring PID SAMPLING TIME

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,
Down, Left and Right buttons to select PID gain setup menu and then press Enter button.
Step2) Use Up and Down buttons in PID GAIN SETUP to select SAMPLING TIME and then press
Enter button. Use Up and Down buttons to input SAMPLING TIME values and then press
Enter button.

3.3.4 PID Auto Setup Value Configuration

Step1) Select your type in Engine Type menu and then start the engine with the preset
configuration values maintaining it with no load.
Step2) During the normal operation, press Menu button of the controller and then you can see
DRIVE UNIT MENU. Use Up, Down, Left and Right buttons to select PID auto setup menu
and then press Enter button.
Step3) The menu offers function for automatic designation of the P, I and D parameter values
related to the engine PID control. Select PID auto setup menu in DRIVE UNIT MENU and
then press Enter button to see the system message “Auto Setup Mode PID setting?” with
YES or NO options.

Step4) Press YES and then the system message “PID AUTO SETUP MODE” will appear. As PID auto
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 setup was initiated during the operation, PID auto tuning is already in progress.

Step5) PID tuning repeats a process to obtain PID values and a window to indicate whether the
process succeeded or failed will appear in several minutes (approx. 4 to 6 minutes). If the
process succeeded, the system message window will appear together with OK button. If you
press Enter button, you will go back to normal operation window and the auto-tuned values
will apply to the normal operation that will be continued.
Step6) If auto-tuning failed to identify optimized P, I and D values within 4 to 6 minutes, the
system message window will display failure. If you press Enter button, you will go back to
normal operation window. If you want to repeat the process, you need to start with Step1
again.

3.3.5 DATE/TIME Value Configuration

Step1) press Menu button of the controller and then you can see DRIVE UNIT MENU. Use
direction buttons to select DateTime setup menu.
Step2) Use Up, Down, Left and Right buttons to input year, month, day and hour and then press
Enter button.

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3.3.6 ALARM LIST
Step1) press Menu button of the controller and then you can see DRIVE UNIT MENU. Use
direction buttons to select Alarm List menu and then press Enter button.
Step2) Use Up, Down, Left and Right buttons in ALARM LIST menu to confirm the fault messages.

[Alarm Code Table]

Alarm
Alarm Item Description Identified Alarm Output
Code
E01 Battery Low When the battery voltage continues to be LCD alarm message, Error LED
lower than Low Battery voltage values for lamp
more than 5 seconds

E02 Battery High When the battery maintains its voltage LCD alarm message, Error LED
exceeding 30VDC for more than 5 seconds lamp

E03 Pick-up Error Problems in sensor signals when the engine LCD alarm message, Error LED
starts. (Engine RPM lower than 600) lamp

E04 Pick-up Error Problems in sensor signals during the engine LCD alarm message, Error LED
operation (Engine RPM 600 or higher) lamp

E05 Actuator Current Short Disconnection in the actuator or the LCD alarm message, Error LED
connecting circuits lamp

E06 Actuator Current Broken Short-circuits in the actuator or the connecting LCD alarm message, Error LED
circuits lamp

E07 Over Speed Engine RPM exceeding the configured over LCD alarm message, Error LED
speed values lamp

E08 FET Drive Error Damages to components in the actuator LCD alarm message, Error LED
output section inside the controller lamp

3.3.7 Actuator test

The menu offers function to test whether there is any problem in operating load current of the
actuator attached to the engine. It indicates voltage and current for on/off.

3.3.8Default setup Functions

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,
Down, Left and Right buttons to select Default setup menu and then press Enter button.
At this moment, the system message “Initialization system setting?” will appear.

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 Step2) Use Left and Right buttons to select either YES or NO in System Message and then press
Enter button.

Default setup will change the configuration values of the engine to the default values. In order to
initiate default setup, you need to select YES and then press Enter button. Press No button if
you don’t want to.

3.3.9 System info Functions

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,
Down, Left and Right buttons to select System info menu and then press Enter button.

The menu displays information of the controller and the information includes the serial number,
software version, last update date, alarm count and engine runs.

3.3.10 LCD setup Functions

Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,
Down, Left and Right buttons to select LCD setup menu and then press Enter button.
Step2) Use Up and Down buttons to select menus including LCD BRIGHTNESS and LCD
CONTRAST for adjustment and then press Enter button. Use Up and Down buttons to input
setting values and then press Enter button.

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3.3.11 System monitor Functions
Step1) Press Menu button of the controller and then you can see DRIVE UNIT MENU. Use Up,
Down, Left and Right buttons to select System monitor menu and then press Enter button.
It offers menu to monitor the controller operation. It shows values for Engine RPM, Valve
Duty, Valve Current, Aux RPM Input, Pickup Voltage and Bat Voltage.

4. How to Operate

4.1 Operating Sequence for Digital Speed Controller

STEP1) Supply DC +24V power to the battery terminals (E (-), F (+)) of the controller.

STEP2) Configure parameter values required for selection of the engine type and control of
the engine.

STEP3) Install the controller on the generator system and complete circuit wiring.

STEP4) The controller will activate the actuator with power supply and pick-up sensor input.

4.2 Detailed Operating Sequence

STEP1) Supply DC +24V power to the battery terminals (E (-), F (+)) of the controller.
Power supply to the controller can be done by direct connection to the battery or power supply
controlled by external control devices. Fuses (15A/24V) are required for power supply to the
controller through the terminal.
When the controller displays Low Battery Fault message, you need to charge the battery or replace it
with the one having normal voltage before starting the controller.
STEP2) Configure parameter values required for selection of the engine type and control of
the engine.
There are 3 ways to configure parameters required for the controller:
1. Using default setup
2. Designating the engine type in Engine Type menu
3. Configuring each parameter in System setup menu
For more information, see Chapter 3. Configuration and Operation.
STEP3) Install the controller on the generator system and complete circuit wiring.
Once the configuration is completed, the controller will be in Stand By condition preparing to receive
input information from pick-up sensor and surrounding terminals and operate.
STEP4) The controller will activate the actuator with power supply and pick-up sensor input.
When the power is supplied and the pick-up terminal delivers normal sensor inputs as the engine
starts, the controller activate the actuator.

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5. Troubleshooting
5.1 Alarm List Check
Where there are problems in the system operation, you need to review the alarm list menu of the
controller and then check the engine and the system in reference to the alarm codes.

Alarm
Alarm Item Alarm Condition Output Control Measures
Code
E01 Battery Low When the battery voltage 1. Alarm message pop-up on 1. Check the battery line
continues to be lower than Low LCD 2. Replace the battery
Battery voltage values for more 2. Error LED on
than 5 seconds
E02 Battery High When the battery maintains its 1. Alarm message pop-up on 1. Check the battery line
voltage exceeding 30VDC for more LCD 2. Replace the battery
than 5 seconds 2. Error LED on
E03 Pick-up Error Problems in sensor signals when 1. Alarm message pop-up on 1. Check the RPM sensor
the engine starts LCD and connecting circuits
(Engine RPM lower than 600) 2. Error LED on 2. Replace the RPM sensor
3. Actuator control signal off
E04 Pick-up Error Problems in sensor signals during 1. Alarm message pop-up on 1. Check the RPM sensor
the engine operation LCD and connecting circuits
(Engine RPM 600 or higher) 2. Error LED on 2. Replace the RPM sensor
3. Actuator control signal off
E05 Actuator Current Disconnection in the actuator or 1. Alarm message pop-up on 1. Check the disconnection
Open the connecting circuits LCD in the actuator and
2. Error LED on connecting circuits
2. Replace the actuator
E06 Actuator Current Short-circuits in the actuator or the 1. Alarm message pop-up on 1. Check the disconnection
short connecting circuits LCD in the actuator and
2. Error LED on connecting circuits
2. Replace the actuator
E07 Over Speed Engine RPM exceeding the 1. Alarm message pop-up on 1. Check the speed setting
configured over speed values LCD 2. Adjust PID setting
2. Error LED on values
3. Actuator control off
E08 FET Drive Error Damages to components in the 1. Alarm message pop-up on 1. Check the actuator and
actuator output section inside the LCD connecting circuits
controller 2. Error LED on 2. Replace the controller
3. Actuator output power cutoff

1) When problems described in alarm codes E03, E04, E07 or E08 occur, the engine is not available for
safe operation and therefore the engine will stop as the controller will turn off the actuator for
safety.
2) When problems described in alarm codes E03, E04, E07 or E08 occur, the engine will not be able to
restart as long as the alarm is not released.
3) When alarms occur, you can release them by turning off the power of the controller.
5.2 System Checks and Measures
For initial installation, it is recommended for you to check any disconnection in circuits before taking
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measures described here (see Chapter 2. Installation for how to install the controller).

You can check the controller for failure diagnosis in accordance with the following procedure.

Step1) Check the battery voltage whether it is higher than the Low Voltage setting value. If normal,
supply power to the controller and then operate it. If the voltage is lower than the setting
value, you need to charge the battery or replace it before operating the system.

Step2) Check the input resistance in the DC +24V input terminals (-E, +F) of the battery whether the
resistance is higher than approx. 10K Ohm. If the resistance does not meet this condition, do
not supply power to the controller and contact our A/S center for service request.

Step3) Check whether the power LED turns on or not after supplying power to DC +24V input
terminals (-E, +F) of the battery. If the LED does not turn on, cut the power off and contact our
A/S center for service request.

Step4) Check whether the power LED turns on and Doosan logo appears on the LCD display after
supplying power to DC +24V input terminals (-E, +F) of the battery. If you cannot see the logo,
press LCD key button to check the LCD display once again. If you cannot still see the logo, cut
the power off and contact our A/S center for service request.
Step5) Check the controller terminals (C & D) with AC meter or oscilloscope to check whether signal
inputs of AC RMS 3V or higher are detected. If no signal detected, check whether the pick-up
sensor maintains the gap between 0.9 and 1.1mm and then check whether the pick-up sensor
has resistance of 110 Ohms (±10%). If you cannot still detect no signal, replace the pick-up
sensor and then operate the controller.

Enquiry for A/S Services Enquiry for Purchasing

Engine Technical Service Team: Ansan Component Center:

+82 32 211 1114 +82 31 400 2114

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