Harsen GU320a User manual

GU320a Controller Manual
1
CONTENT
1. Introduction…………………………………………………………………….…….2
2. Shape and connection …………………….………………………………………..2
3. Operation panel……………………………………………………………………...5
4. Installation ……..…………………………………………………………….……6
5. Control and operation……………………………….………………………….….7
6. Measuring ………………………………………………………..……………….….9
7. Fault signal………………………………………………………….……………..10
8. Parameters configuration…….…………………………………………….…….11
9. LCD and menu system………………………………………………………..….….13
10.Communication ………………………………………………………..……….……15
11.Preparations ………………………………………………….……………….…..20
12.Troubleshooting………………………………………………………………….….21

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1. Introduction:
GU320a is a kind of intelligent controller of generator which adopt high grade CMOS chip. It can configure the control
procedure and protection parameters of the generator, including lots of function such as measuring, controlling, protection,
three remote and so on, which completely satisfied the automatic controlling requirement of different generator sets for the
generator user or factory.
The controller measure and display all parameters the generator output, and the rotating speed, oil pressure, temperature,
DC source voltage, running time of the engine and so on. All of the voltage measured in real virtual value to ensure the
accuracy of the data.
Including big LCD display and menu selection for Chinese and English.
The keys on the control panel are used to select the control mode, start the running procedure, display data, and modify the
running protection parameters. The LED indicates the operating mode of the controller and the running state of the
generator sets. LCD display each measured parameter and state.
The controller is integrated closely by aluminum alloy panel and steel shell which has been spurt powder. All connection of
the controller are connected by pin-like terminal with lock, such device can be connected、moved 、maintained and
replaced easily and conveniently.
This manual is available for the generator intelligent controller GU320a only, which you should
carefully read before use
2Shape and connection:
2.1 Detail size:
Control panel W205mm×H156mm
Hatch for installation W186m ×H137m
Thickness D68mm(unconnected)
131211109161514
C2624 25
D17 222120 23 282718 19
A1B
4357682
RS-CONNECTOR
NOTE:The shell of the controller should be grounded to earth, surge of the electricity system and transient shock to the
meter can be reduced through the perfect low ground impedance.
Running temperature of the controller -20~70℃
Storage temperature of the controller -30~80℃

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2.2 Connection port:
Pin NO. Function Signal Line
A1 phase A V input 0-300VAC 1mm² line
A2 Phase B V input 0-300VAC 1mm²line
A3 Phase C V input 0-300VAC 1mm²line
A4 Nzero line 1mm² line
B5 A phase A input {S1} 0-5A(AC) 1mm²line
B6 B phase A input {S1} 0-5A(AC) 1mm²line
B7 C phase A input {S1} 0-5A(AC) 1mm²line
B8 Current input common {S2} 0-5A(AC) 1mm²line
C9 Relay output common 1.5mm²line
C10 Fuel electromagnetic valve relay output N.O dry contact,16A/30VDC 1.5mm²line
C11 Start relay output N.O dry contact,16A/30VDC 1.5mm²line
C12 Exciter source of charger output Forbid to cathode when no use 1mm²line
C13 Gen. Set running output N.O dry contact,3A/30VDC 1mm²line
C14 Fault alarm output N.O dry contact,3A/30VDC 1mm²line
C15 Pre-alarm output N.O dry contact,3A/30VDC 1mm²line
C16 Idle output N.O dry contact,3A/30VDC 1mm²line
D17 Pressure detection P-sensor 1mm²line
D18 Temperature detection T-sensor 1mm²line
D19 standby Measure 0~5Vdc 1mm²line
D20 Pressure signal Low potential valid 1mm²line
D21 Temperature signal Low potential valid 1mm²line
D22 E.stop signal Low potential valid 1mm²line
D23 Start (external control) signal Low potential valid
D24 Standby signal measure Low potential valid 1mm²line
D25 Magnetic sensor signal{+}
D26 Magnetic sensor signal{-}
1-35Vac
connected to cathode of the DC source
inside
Two-core
shield
D27 Operating source {+} 1mm²line
D28 Operating source {-} 8-35VDC 1mm²line

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2.3 Typical wiring diagram:
Loading output
(3P&N)
G
AUX SUPPLY
9
F5
(10A)
DCV
(8-35VDC)
2728
+
-
(2A)
F4
(Crank)
油门
(Fuel) 起动
10
充电机
12 14
13
11
T-sensor
Pressure
Temperature
E.stop
Remote start
P-sensor
16
15 20 17
2321 22
Speed sensor
(PICK-UP)
26251918
8
6
7
3
2
5
4
F2
F3
IDLE
RUNNING
1
Generator
F1
FAULT
PRE.ALARM
RS CONNECTOR
Standby(0~5Vdc)
24
(standby)
Note:cathode of the battery and shell of the contoller must be grounded to earth properly

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3Operation panel
The whole Operation panel including three parts: LED display for measuring parameters、operating keys and running-
status LED indicate。
3.1 LCD and its controlling keys
LCD with 128×64mm lattice can display multiple lines of data information simultaneously and additive background-light
function which make operators read information whenever day or night. To turnoff the background-light, just keep pressing
any key for a while.
LCD and its control keys provide a friendly operating interface for operators, operators can read information and setting
running parameters conveniently.
3.2 LCD display of menu system and running state
Function Name
Entering submenu/modify/confirming modification
Scroll up menu/ value ascend
Scroll down menu/ value descend
3.3 Operating keys and LED
Function Name
AUTO key/LED
The key is used for “auto-operate mode”. Running in this mode, the LED above
the button will illuminate. According to the “remote control startup input signal”,
the controller determines whether the generator startup or not.
MAN Key / Indicator Light
The key is used for “manual-operation mode”. Running in this mode, the LED
above the button will illuminate. By pressing “START” and “STOP” key, the
controller will start or stop the generator.
TEST Key/ Indicator Light
The key is used for testing operation mode settings. Running in this mode, the
indicator light on the key on. Here, when the “remote control startup input
signal” simulated by the controller is valid, the generator startup. When it switch
other mode, the generator stops.
START Key/LED
The key is used for generators manually startup. And when the controller is in
“manual-operation mode”, press this key to start the generator. Till the controller
performing the start procedure to the Gen set run in normal, the LED above the
key on. After the Gen set running normally, the LED above the key on.

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STOP/RESET key/LED
Used to stop the generator by hand, when the controller set in “MAN” mode, this
key could stop the generator. Press this key more than 2 seconds can release the
fault stop lock if there is fault output. (When the controller performing the stop
procedure, the indicator light above the key illuminate. If failed to stop, the light
flash.)
LAMP TEST /MUTE key
Alarm mute and lamp test key. Press the key more than 2 seconds, all LEDs on
the panel will light. It used to test all LEDs on the panel. When Pre-alarm or fault
alarm occur, press this key can mute the buzzer. At the same time the light above
the key illuminate. Press it again will cancel mute. If the controller still in fault,
the buzzer will keep alarm.
4 Installation
4.1 Hatch size for panel installation as the figure attached.
Four special screws fix the controller. If the shell of the controller is installed on the body of a generator directly or
other violent vibratory device, preventing device must be installed.
4.2 Connection for control line please refer to the diagram attached and the typical wiring diagram 2.3
above.
4.3 Oil pressure and temperature sensor installation of the engine:
5 Control and Operation
There are three control modes: “AUTO”、“MANUAL” and “TEST”。
()
D18 GU320a CONTROLLER
D17 D18
D17

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5.1 Configuration for operating mode:
Operation Description
Press “AUTO” (for 2 seconds), the LED above illuminate, the controller then
operating in “AUTO”
Press“MAN”key(for 2 seconds), the LED on the button will
illuminate, then the controller runs in this mode.
Press “TEST” (for 2 seconds), the LED above illuminate, the controller then
operating in “TEST”
NOTE: you can choose only one of the three modes.
When the controller is ready
Operation Description
U=0V I=0A
P=0kW F=0Hz
SP=0rpm OP=0kPa
TEMP=0℃Bat=24V
When the controller can’t detect the running speed, pressure, temperature
of the engine, the related data will be 0, and the LCD display:
RUN
5.2 Start and control process:
Operation Description
When the controller run in TEST, or the remote control start signal able in
Auto, or press “START” in MAN, the controller begin to delay the start
procedure, the light above the key will bicker.
The LCD display the count for start delay (not in “MAN” ) START 00:09
Fuel relay action, the fuel electromagnetic valve of the engine open. After
delay for 200 milliseconds, the start relay active and crank begin. CRANK 1
When the running speed of the engine reach the crank cutout speed, the
controller will stop the start output and begin the safety-on delay. SAFETY-ON DELAY 00:08
U=380V I=0A
P=0kW F=50Hz
SP=1500rpm OP=465kPa
TEMP=70℃Bat=24V
After the controller has detected the normal running speed, output voltage,
pressure, temperature has been setup, and no other fault the same time, then
display the parameters as right.
(Scroll page for detail)
RUN

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When the remote control start signal valid, the start delay will active and begin to time. During the delay, if the remote
start signal invalid, start delay will instantaneously stop, the controller will stop the start procedure, and return to original
state“READY”after the time for fail to start out.
During cranking or idle, if the remote control start input signal is invalid, the controller stop the followed start
procedure and close all output for relay control, then stop the start process and return to original state“READY”after the
time for fail to start out.
Note: when cranking, the engine ignited, while the alternator output frequency reach the preset frequency, the start
motor de-energized:
Or de-energized the motor through the following way
a、The magnetism speed pickup device mounted on the flywheel of the engine has detected the frequency reached preset.
b、The output voltage of the alternator reach 80% of the rated voltage.
c、The low oil pressure switch of the engine open.
5.3 Fail to Start and Restart Condition:
Operation Description
During the cranking time, engine igniting is forbidden, and the controller
remains crank intermission, it will not output starting signal. FAIL
TO START indicator light flash.
CRK-RST
00:04
Once the crank intermission reach, the controller will attempt to start the
engine again. CRANK 2
The phenomena above repeat again and again, until the engine reach the normal running parameters. While
starting, if any stop fault occurs, the controller will stop controlling output instantly until the fault eliminated
and reset, then it can be operated again.
5.4 Fail to start condition:
Operation Description
When the phenomena above repeat again and again, the starting attempts
exceed preset , the controller will stop controlling output. Then the LCD
display:
ALARM:
START FAILURE
NOTE:
If it occurs FAIL TO START fault, the operator must check the whole
“Genset” system. and confirm the fault and eliminate them, then press
“ STOP/RESET” key to unlock the fault-locking state, and reset the
controller again.
5.5 Auto stop process
Operation Description
When the remote start input signal is invalid, the cooling delay begin to
count down, the running signal cut and the LCD then display:
COOL
02:34
While the cooling delay timeout, the controller disconnect the fuel valve, and
count down for Fail To Stop, then the LCD display: STOP 00:24
While the Fail To Start timeout, if the engine still run, the controller will
sent an alarm, and the LCD display: ALARM:
STOP FAILURE
If the engine stop during the fail to stop permission delay, the LCD will display: READY
When the remote control start input signal is invalid, the cool delay begin, if the remote control start input signal is
valid during the delay, the cooling delay time stop instantaneously, the controller monitor each parameter again, and reset
Auto running state if normal.
5.6 Stop by “MAN”
Operation Description

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The generator running normally, when press “STOP/RESET” key for a
while in “MAN” mode, the controller begin cooling delay to stop as the
Auto stop. Press the “STOP/RESET” key again for a while will disconnect
the fuel valve, and the generator sets stop.
The Fail To Stop time begin, the LCD display: STOP 00:24
When the stop failed time beyond, the engine still run, the controller will
send an alarm, the LCD will display: ALARM:
STOP FAILURE
The engine stop slowly during the Fail To Start permission time, and the LCD
display: READY
5.7 The oil electromagnetic valve is the start running and stop process of the generator of normal open
type.( Different from normal closed type).
Start control process:
When start running, oil relay of the controller take no action, no power in the oil electromagnetic valve, namely the oil
electromagnetic magnet take no action.
Stop control process:
The control at the begging of the stop control process output oil electromagnetic valve source, oil electromagnetic
valve action, the engine begin to stop. Then powered down after for the delay according to the fail to start delay setting.
Other control process is the same to the engine of normal closed oil electromagnetic valve.
5.8 Idle and Hotstart function
Select Idle or Hotstart according to the “IDLE DELAY setting”. While set to above 0, the Idle delay is selected, and
set to 0 to release Idle delay and to select Hotstart function. The operating principle is: when Ready for Idle (READY status),
the Idle relay open. The controller runs the start procedure. The start delay timeout, the fuel relay active while the idle delay
active at the same time. The start motor open after started, the Idle delay begin to count down. When timeout, the idle relay
open, and the safety-on delay begin. While each parameter in normal after timeout, the unit starts to run. When delay for
stop begin, the Idle delay active until finish stop. When Ready for Hotstart function (READY status), the Hotstart relay
open, the start delay begins, the Hotstart relay active at the same time. When the start delay time to prepare for cranking, the
Hotstart relay open, the fuel relay active. Then cranking succeeds and generator set run in normal state. The Hotstart relay
take no action while delay for stop.
6Measuring
6.1 Electricity measuring data
Gen. Phase V L1-N L2-N L3-N
Gen. Line V L1-L2 L2-L3 L3-L1
Gen. A L1 L2 L3
Gen. HZ HZ
Gen. KVA Sum of phase L1 L2 L3
Gen. KW Sum of phaseL1 L2 L3
Gen. PF Average of L1 L2 L3
Gen. KVAr Sum of phase L1 L2 L3
Gen. KWh

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Gen. KVArh
As the frequency measuring is from L1 phase of the generator, ensure no fault with this part before use.
6.2 Other measuring data
Oil pressure(KPa)Obtain the data from an external sensor
Coolant temperature(℃) Obtain the data from an external sensor
Rotating speed (RPM)Obtain the data from speed sensor
Total running time of the oil engine(h)
Battery voltage (V)
7Fault signal
7.1 Warning
(NOTE: warning is a very serious alarm state, it won’t affect the generator system operation, only
remind the operator of the improper condition. When warning occurs, the state indicator light illuminate, but
the buzzer won’t alarm and the fault won’t lock. Once the fault has been eliminated, the warning light off
automatically.
Charge failure The controller detect the voltage lower than the “LOW battery pre-alarm setting” from the aux AC
charger, “CHARGE FAILURE” indicator light illuminate, and the buzzer alarm.
Battery low The controller detect the battery voltage lower than the “Low battery pre-alarm value”, the state LCD
will display “WARNING:BATTERY LOW”, and the buzzer warn.
Low pressure After the safety-on delay timeout, and the controller detect the output pressure of the engine lower than
the low pressure alarm value preset, the buzzer warn. The state LCD will display “WARNING:LOW OILPRESS”
H temperature The controller detect the coolant temperature of the engine higher than the high temperature preset alarm
value, and then the buzzer warn, the state screen display“WARNING:COOLANT TEMP”,the buzzer warn.
Overspeed If the running speed of the engine over the preset alarm value, the LCD will display “WARNING:
OVER SPEED”,and the buzzer warn.
Underspeed If the running speed of the engine descend to alarm level preset, then the state LCD display
“WARNING:UNDER SPEED”,and the buzzer warn.
High voltage If the controller detects the output voltage of the generator over the alarm value preset, the state LCD
will display “WARNING:V HIGH”,and the buzzer warn.
Low voltage If the controller detects output voltage lower than the alarm value preset, then the state LCD will display
“WARNING:V LOW”,and the buzzer warn.
Overcurrent If the controller detects the output current over the alarm value preset, then the state LCD display
“WARNING:I HIGH”,and the buzzer warn.
Standby input If set the aux input to a warning input, then if the signal at the input is valid, the LCD will display
“WARNING:EXT. ALARM”,and the buzzer warn.
7.2 Stop Fault
(Note: “Stop fault” can lock the control system and stop the generator running. After the fault is
eliminated, by pressing the “reset” key unlocking the fault lock, then you can operate the controller again.)
Fail to Start If the engine starting times over the preset value, the engine still does not run, namely it occurs “Fail to
Start.” The LCD will display“ALARM:START FAILURE”, The indicator light Fail to Start illuminate, and the
buzzer warns.
Fail to Stop If the generator fail to stop after the stop delay timeout, then the buzzer warn and the LCD display
“ALARM:STOP FAILURE”。
Emergency stop When the emergency stop input signal is valid, the controller stop all output of the relay except the alarm,
the LCD display “ALARM:E.STOP”,“EMERGENCY STOP” indicator light illuminate, and the buzzer warn.

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Low Oil Pressure After the safety-on time-delay timeout, the controller detects the oil pressure switch closed, the engine
stop instantaneously, and the LCD display “ALARM:LOW OILPRESS”, the fault indicator light “LOW OIL
PRESSURE”, the buzzer warn.
H Temperature The controller has detected the T-sensor switch of the engine closed, the engine stop instantaneously, the
LCD display “ALARM:COOLANT TEMP”,and the indicator light“HIGH TEMPERATURE” illuminate, the
buzzer warn.
Overspeed The controller has detected the running speed of the engine beyond the overspeed fault setting value, the
engine stop instantaneously, the LCD display “ALARM:OVER SPEED””,and the indicator light
“OVERSPEED” illuminate, the buzzer warn.
Under Speed The controller detects the running speed of the engine lower than the low speed fault value, the engine
stop instantaneously, and the LCD display “ALARM:UNDER SPEED”,the buzzer warn.
High Voltage The controller detect the output voltage of the generator higher than the high voltage fault value, the
engine will stop after confirming the delay, and LCD display “ALARM:V HIGH”,the buzzer warn.
Low Voltage After the safety-on delay timeout, the controller detect the output voltage of the generator lower than the
low voltage fault value, the LCD will display “ALARM:V LOW””after confirming the delay,and the buzzer warn.
Overcurrent The controller detect the output current of the controller higher than the over current fault value, the
engine will stop after confirming the delay, and the LCD display “ALARM:I HIGH”,the buzzer warn.
Standby Output If set the aux input to fault stop, then when the signal at the input is valid, the engine will stop
instantaneously, and the LCD display “ALARM:EXT. ALARM”,the buzzer warn.
NOTE:
The data of low oil pressure pre-alarm is from the measuring of the oil pressure sensor, and the data of low
pressure stop fault is from the measuring of the oil pressure sensor (set for no use at factory) or the oil pressure
switch state.
The data of high temperature pre-alarm is the water position from the measuring of the temperature sensor, and
the data of high temperature stop fault is the water position from the measuring of the temperature sensor (set for
no use at factory) or the temperature switch state.
The rotating speed of the engine typically from the measuring frequency of the speed sensor mounted on the
flywheel of the engine, if no speed sensor equipped in the system, the controller will take the voltage frequency of
the generator output as the controlling and fault protection parameter. To be convenient for the user, part of the
data is rotating speed, RPM=HZ*30.
Generator fault during the running of the generator: stop instantaneously after the high temperature , or low
pressure, or overspeed, or under speed occur. But the low speed and low pressure required the idle delay set to 0
(without idle function) to active protection, or it won't be active.
8Parameter configuration
8.1 SYSTEM
NO. Item Preset Range
1.0 QUIT
1.1 CT 60 1~5000
1.2 VT 1 1~100
1.3 Comm Address 1 1~255
1.4 Default settings
1.5 <Language> English/中文 English 中文/English
1.6 Firmware update
8.2 GENERATOR
NO. Item Preset Range
2.0 QUIT

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2.1 V Low Alarm 0V AC45~20000V 0 (no setting)
2.2 V Low preALM 198V AC45~20000V 0 (no setting)
2.3 V High preALM 253V AC45~20000V 29999 (no setting)
2.4 V High Alarm 29999 AC45~20000V 29999 (no setting)
2.5 I High preALM 9999A 0~9999A 9999 (no setting)
2.6 I High Alarm 9999A 0~9999A 9999 (no setting)
2.7 Alarm delay 10s 0~600s
8.3 ENGINE
NO. Item Preset Range
3.0 QUIT
3.1 Nominal speed 1500 99-9999 RPM
3.2 Pickup frequency 3000 1-9999 Hz
3.3 Set pickup now
3.4 Fuel mode 0 0~1 0(NC) 1 (NO)
3.5 T-sensor mode 0 0~8 0 (no use)
3.6 P-sensor mode 0 0~9 0 (no use)
3.7 H-sensor mode 0 0~1 0 (no use) 1 (use)
3.8 Start delay 10s 0~300 s
3.9 Crank attempt 3 1~10s
3.10 Crank time 8s 0~30 s
3.11 Crank reset 15s 0~300 s
3.12 Crank disconnect 300RPM 1-9999 RPM
3.13 Idle delay 0秒0~9999s
3.14 Safety-on delay 60s 0~600s
3.15 Cooling delay 300s 0~600 s
3.16 Stop delay 20s 0~60s
3.17 Under SP Alarm 0 RPM 0-9999 RPM 0 (no setting)
3.18 Under SP preALM 1440 RPM 0-9999 RPM 0 (no setting)
3.19 Over SP preALM 1600 RPM 0-9999 RPM 9999 (no setting)
3.20 Over SP Alarm 1710 RPM 0-9999 RPM 9999 (no setting)
3.21 Oil-P low Alarm 140KPa 50~300Kpa 0 (no setting)
3.22 Oil-P low preALM 220KPa 50~300Kpa 0 (no setting)
3.23 Coolant preALM 95℃70~160℃9999 (no setting)
3.24 Coolant Alarm 105℃70~160℃9999 (no setting)
3.25 Batt low preALM 8.0V 1~25V 0 (no setting)
3.26 External. Alarm 0
3.27 External analog 2
0 unit V, 1 unit %, measuring 0-5v signal.
2 unit %, self determine the input according to the
resistance type and sensor data.
8.4 Note for pressure and temperature sensor
Different type of P-sensor and T-sensor according to the table followed, if the sensor available is not in the table, then
write the sensor parameter into the controller through the software, and the sensor setting in the parameter setting should be
the last type “user define”
Pressure sensor
NO. Type
0 NOT USE
1 VDO 10 bar
2 VDO 5 bar
3 Datcon 10 bar
4 Datcon 7 bar

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5 Datcon 5 bar
6 Murphy 7 bar
7 CMB 812
8 KP-YV01
9 User define
Temperature sensor
NO. Type
0 NOT USE
1 VDO 120 degrees C
2 Datcon high
3 Datcon low
4 Murphy
5 Commis
6 TS120
7 KP-T01
8 User define
9LCD and menu system
Display several lines of information at the same time according to the 128×64 lattice. LCD has background light.
Press any key for a while to turn off the background light. Set a different parameter in every page and controlled upon it,
each electricity parameter of load displayed in main page, press “ ”and“ ”scroll to display each electricity
parameter and measuring data. If there is no fault occur, LCD hold the main page, and when fault occur, LCD display the
fault information in the state screen instantaneously. When more than one fault occur, LCD display one fault state of them.
Press “ ”and“ ”refer to the running parameters.
Increase and decrease by degrees to set and adjust the parameter. When press the increase or decrease key for a while,
the ones digit changes one by one, and then the tens digit change after ten changes, the rest may be deduced by analogy.
Press“”in the main page two seconds to enter setting state, then press “ ”and“ ”to look over in the menu
of the same level, and press “”to enter next submenu to select and adjust the item, press “ ”to adjust. When
indicate to enter password, enter “”“ ” “”“ ”,then press“ ”two seconds to quit setting state.
9.1 Static LCD display:
When the controller is ready
Operation Description
U=0V I=0A
P=0kW F=0Hz
SP=0rpm OP=0kPa
TEMP= OPEN Bat=24V
While the controller hasn’t detected the running speed of the engine, if the P-
sensor and T-sensor disconnect , the related data will display “OPEN”, and
the LCD display:
RUN
Set the controller without T-sensor and P-sensor
Operation Description
U=0V I=0A
P=0kW F=0Hz
SP=0rpm OP=---kPa
TEMP= ---℃Bat=24V
The controller won’t check the data such as pressure and temperature of the
engine, the related data will display “— ”in ready or running, and the LCD
display:
RUN
Controller running normally
Operation Description

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U=0V I=0A
P=0kW F=0Hz
SP=1500rpm OP=475kPa
TEMP=80℃Bat=25.4V
The current and voltage in this page is the average of the three phase.
RUN
V1=220V U12=380V
I1=0A A1=0kVA
P1=0kW PF1=1.00
Q1=0kVAr
Press “ ”or“ ” to switch pages
RUN
V2=220V U23=380V
I2=0A A2=0kVA
P2=0kW PF2=1.00
Q2=0kVAr
Press “ ”or“ ” to switch pages
RUN
V3=220V U31=380V
I3=0A A3=0kVA
P3=0kW PF3=1.00
Q3=0kVAr
Press “ ”or“ ” to switch pages
RUN
Run Hour=12
KWHr=1000
KVArHr=250
AI=0%
Press “ ”or“ ” to switch pages
RUN
9.2 Adjust the running parameter
Example: (Set 1000/5 of the current transformer, the CT should be 200)
Operation Description
Press “ ”for two seconds to enter the configure menu, and then the
LCD display:
<<SETTING/参数设定>>
0.QUIT
Press “ ”and“ ”key, then press “ ”, the LCD will display: 1. CT
=1000
Press “ ”, and then press “ ”will indicate to enter the password:
“”“ ” “ ” “ ”
1. CT
Password:****
Press“ ”or“ ”to vary the parameters, set to 200 at this time and
the LCD then Indicate:
1. CT
=200
After the configuration, press “ ”to confirm, and then press “ ”
and“ ”key, the LCD then display:
<<SETTING/参数设定>>
1. System
Then press “ ”and“ ”to quit, or press “ ”key more than two
seconds to exit, the LCD then display: READY
Example: ( Set the start attempts of the controller to be 2)
Operation Description
Press “ ”more than two seconds to enter the parameter setting menu,
then the LCD display:
<<SETTING/参数设定>>
0.QUIT /退出

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Press “ ”three times then press “ ”, then the LCD display: 3.ENGINE
0.QUIT
Press “ ”nine times and then press “ ”, the LCD will display: 9. Crank attempt=3
Press “ ”will indicate to enter password, enter the password: “ ”
“ ” “ ” “ ”
9. Crank attempt
Password:****
Press “ ”or“ ”to vary the parameter. Set it to be 2 this time, press
“ ”to confirm, then press“ ”two seconds to exit the parameter
setting menu.
9. Crank attempt =2
Example:( Reset all the parameters to be the default value at factory)
Operation Description
Press “ ”two seconds to enter setting menu, then the LCD display: <<SETTING/参数设定>>
0.QUIT
Press “ ”and“ ”key, then press “”four times, the LCD
then display:
4. Default settings
Press “ ”and then indicate you to enter password, enter and set the
password to be :“ ” “ ” “” “ ”
4. Default settings
Password:****
Press “ ”to default settings, then press “ ”before press “ ”
for two seconds to exit the parameter setting menu.
4. Default settings
DONE
Example:( Set the controller to line programming mode)
Operation Description
Press “ ”for two seconds to enter parameter setting menu, then the LCD
display:
<<SETTING/参数设定>>
0.QUIT
Press “ ”and“ ”key, then press “”one time, then the
LCD display:
6. Firmware update
Press “ ”key will indicate you to enter password(3132), enter the
password: “ ” “ ” “” “ ”
6. Firmware update
Password:****
Then press “ ”to enter program mode. You should make sure the
power supply is normal in this mode. The program will reset for use after
correctly burn to record according to the program software, or it won’t exit,
and you should remove the working source. Then the LCD display:
Firmware Update.
Download from PC.
Don’t turnoff power,
Before finished!
Settings and operating for other parameters refer to above.
10 Communication(optional, uses can select according to practice)
10.1 Introduction
The controller with an“RS CONNECTOR”communication port,which use match with the CI485A(CI232A)
communication interface module, so as to made the controller possess RS485/RS232 serial communication port. The serial
communication adopts the designing of photoelectric insulation, besides, it installed protective circuit to prevent the
interference and spoil from the error connection. RS485 adopts 9600-baud communication. The controllers with
communication function possess the following benefits.
100% Remote signaling including running states and fault ones.
100% Remote measure data Include measurement data of all controllers.
100% Remote adjustment including all configurable parameters.

GU320a Controller Manual
16
100% Remote control function Covering the whole control function of panel.
10.2 CI485 Communication Link
(Controller with RS485 com and CI48A accessory), more details please refer to the following wiring
diagram:
(Controller with RS232 com and CI232A accessory ),more details please refer to the following wiring
diagram:
The communication interface provides users a method, to make the users fetch more information that
cannot obtain from the panel. The relative software can display the whole parameters measured and state
information; it also can set various parameters.
RS CONNECTOR
GU320a Controller CI485A
(DB9)
A
S
B (RS485)
Transform terminal
RS CONNECTOR
GU320a Controller CI232A
(DB9)
MODEM
Computer
CI232A
Able to connected respectively

GU320a Controller Manual
17
The controller with RS485 communication interface, which allows connect at least 255 same serial
controllers to the same communication line. And each equipment has sole ID No. To switch PC or MODEM,
you need to collocate another RS485/RS232 converter. Typical wiring diagram as below:
Note
:
Communication cable use high quality twisted pair cable with shielded, and its total length of
cable less than 1000m. Each anode and cathode of RS485 interface must be connected properly, and the
cable shield only can be connected to the earth at one side.
GU320a Controller
(DB9)
RS CONNECTOR
CI485A
A
B
S
Computer
GU320a Controller
RS CONNECTOR
(DB9)
CI485A
GU320a Controller
RS CONNECTOR
(DB9)
CI485A
MODEM
A
转换器
RS485/232
B
S
Able to connect respectively
A
B
S
B
A
S
R connect to risister

GU320a Controller Manual
18
10.3 Central Pick-up Control Unit Communication Protocols
RS485 mechanism is a kind of network form by character signal between the computer and hardware
device. Controller working baud rate is 9600-Baud, communication protocol is MODBUS-RTU. When it is
working, the computer will send out a serial orders to the central pick-up controller, and then wait the reflect
data block..
NOTE: max byte (word) of write/read, read is 16, write is 14. Only continuous write order 10(hex)
could be used for write .
Controller Data Cell Address
Address Byte Content Unit
$1000 1 L3-N Voltage Ph-c phase voltage unit:V
$1001 1 L2-N Voltage Ph-B phase voltage unit:V
$1002 1 L1-N Voltage Ph-A phase voltage unit:V
$1003 1 L3-L1 Voltage AC phase and line voltage unit:V
$1004 1 L2-L3 Voltage BC phase and line voltage unit:V
$1005 1 L1-L2 Voltage AB phase and line voltage unit:V
$1006 1 L3 Current Ph-c phase current unit:A
$1007 1 L2 Current ph-B phase current unit:A
$1008 1 L1 Current ph-A phase current unit:A
$1009 1 L3 PF ph-c PF
$100A 1 L2 PF ph-B PF
$100B 1 L1 PF ph-C PF
$100C 1 Frequency Generator frequency unit:0.1HZ
$100D 1 L3 VA Ph-C real power unit:KVA
$100E 1 L2 VA Ph-B real power unit:KVA
$100F 1 L1 VA Ph-A real power unit:KVA
$1010 1 L3 W Ph-C active power unit:KW
$1011 1 L2 W Ph-B active power unit:KW
$1012 1 L1 W Ph-A active power unit:KW
$1013 1 L3 VAr Ph-C reactive power unit:KVAr
$1014 1 L2 Var Ph-B reactive power unit:KVAr
$1015 1 L1 VAr Ph-A reactive power unit:KVAr
$1016 1 Tacho Rotating speed of Speed sensor unit:RPM
$1017 1 OilPress value of oil p-sensor unit:Kpa
$1018 1 Coolant value of T-sensor unit:℃
$1019 1 VBAT Battery voltage unit:V
$101A 1 VALT Charge excitation voltage unit:V
$101B 1 AI input voltage standby unit:mV
bit0—oil pressure
bit1—water temperature
bit2—emergency stop
bit3—remote control start
$101C 1
Bit4—switch signal standby
bit0—diesel engine oil
bit1—diesel engine start
bit2—Gen.set run in normal
bit3—Alarm output
bit4—Pre-alarm output
$101D 1
bit5—Idle speed output
$101E 1 LED
$101F 1 Palarm Pre-alarm code

GU320a Controller Manual
19
$1020 1 Alarm Alarm code
03:diesel engine stop
04:diesel engine start
05:Test state
06:Man mode
07:Auto mode
$1021 1
08:Reset
$1022 1 SN Product serial number
$2001 1 Comm Address
$2002 1 Language
$2003 1 CT
$2004 1 V Low Alarm unit:V
$2005 1 V Low preALM unit:V
$2006 1 V High preALM unit:V
$2007 1 V High Alarm unit:V
$2008 1 I High preALM unit:A
$2009 1 I High Alarm unit:A
$200A 1
$200B 1
$200C 1
$200D 1
$200E 1
$200F 1
$2010 1
$2011 1 Alarm delay unit:S
$2012 2 KWH unit:Kwh
$2014 2 KVArH unit:KVArh
$2016 1 VT
$2018 1 Nominal speed unit:RPM
$2019 1 Pickup frequency unit:RPM
$201A 1 Fuel mode
$201B 1 T-sensor mode
$201C 1 P-sensor mode
$201D 1 H-sensor mode
$201E 1 Start delay unit:S
$201F 1 Crank attempt
$2020 1 Crank time unit:S
$2021 1 Crank reset unit:S
$2022 1 Crank disconnect unit:RPM
$2023 1 Idle delay unit:S
$2024 1 Safety-on delay unit:S
$2025 1 Cooling delay unit:S
$2026 1 Stop delay unit:S
$2027 1 Under SP Alarm unit:RPM
$2028 1 Under SP preALM unit:RPM
$2029 1 Over SP preALM unit:RPM
$202A 1 Over SP Alarm unit:RPM
$202B 1 Oil-P Alarm unit:Kpa
$202C 1 Oil-P preALM unit:Kpa
$202D 1 Coolant preALM unit:℃
$202E 1 Coolant Alarm unit:℃
$202F 1 Batt low preALM unit:V

GU320a Controller Manual
20
$2030 1 RUNHr unit:HOUR
$2031 1 Ext.Alarm mode
$2032 1 Ext.Analog unit:0 - V / 1 - %
$
2
0
4
0
1 V1 calibration
$
2
0
41 1 V2 calibration
$
2
0
42 1 V3 calibration
$
2
0
4
3
1 I1 calibration
$
2
0
44 1 I2 calibration
$
2
0
4
5
1 I3 calibration
$
2
0
4
6
1 Oil pressure calibration
$
2
0
47 1 Temperature calibration
$
2
0
4
8
1 Battery voltage calibration
$
2
0
4
9
1 Excitation charge voltage calibration
$
2
0
4A 1 Aux input voltage calibration
$204B ――― $205E P-sensor data, ordered according to the resistance(0.1Ω)from big to small and resistance-related
value-resistance
$205F ――― $2072 T-sensor data, ordered according to the resistance(0.1Ω)from big to small and resistance-related
value-resistance
$2073F ――― $2086 oil position sensor, ordered according to the resistance(0.1Ω)from big to small and resistance-
related value-resistance.
Note: fault code table
Code Fault Code Fault
0 NO ERROR 10 BATTERY LOW
1 NO PICKUP 11 CHARGE FAILURE
2 OVER SPEED 12 V LOW
3 UNDER SPEED 13 V HIGH
4 O-SENSOR OPEN 14
5 LOW OILPRESS 15
6 T-SENSOR OPEN 16 I HIGH
7 COOLANT TEMP 17
8 START FAIL 18
9 STOP FAIL 19
11 Preparations
11.1 To confirm that the controller has installed and fixed properly, and the installation ambient must accord with
installation demand
11.2 To confirm the whole connecting of control lines accord to the electric norm, and confirm to the typical connecting
diagram of “1.3”. Especially the DC power supply must add fusing element safety wire to protect, and the polarity must be
right. Otherwise, it will destroy the controller
11.3 The controller must be ground to the earth properly.
11.4 We suggest that the operators install the “ E- stop” key outside. Connecting the “E-stop” output terminal to the normal
contact of “E-stop” key, and the other point of contact must connect to the anode of working source.
11.5 Putting through the DC working source, confirming the preset parameter accord with actual running requirements.
Such as: current ratio, mode of speed sensor, mode of pressure sensor, mode of temperature, etc.
11.6 If the speed sensor is magnetic speed sensor, we must adjust speed measuring parameter
according to the following steps.
Method 1:
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