Smartgen HMC6 User manual

HMC6
POWER MANAGEMENT CONTROLLER
USER MANUAL
SMARTGEN (ZHENGZHOU) TECHNOLOGY CO.,LTD.

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Chinese trademark
English trademark
Smartgen —make your generator smart
Smartgen Technology Co., Ltd.
No.28 Jinsuo Road, Zhengzhou, Henan Province, China
Tel: [phone]
[phone](overseas)
Fax: [phone]
Email: [e-mail]
Web: www.smartgen.com.cn
www.smartgen.cn
All rights reserved. No part of this publication may be reproduced in any material form (including photocopying
or storing in any medium by electronic means or other) without the written permission of the copyright holder.
Applications for the copyright holder’s written permission to reproduce any part of this publication should be
addressed to SmartGen Technology at the address above.
Any reference to trademarked product names used within this publication is owned by their respective
companies.
SmartGen Technology reserves the right to change the contents of this document without prior notice.
Table 1 - Version history
Date
Version
Contents
2014-01-21
1.0
Original release.
2018-06-02
2.0
Updated controller functions and details optimizing.
2019-04-23
2.1
Fixed terminal structure description.
2019-12-25
2.2
Fixed back mask, changed analog frequency and voltage regulating port
and running feedback input port to digital input ports, changed voltage
rise, voltage drop, audible alarm output to digital output ports, changed
GOV/AVR to transducer output and added other functions.
2020-05-20
2.3
Modified heavy consumer description, wiring diagram and added
configuration items, etc.
2020-06-12
2.4
Added related operations and configurations of shaft genset.
2020-12-12
2.5
The original synchronization setting was divided into synchronization
setting and synchronous calibration setting, added input and output
functions.
2021-3-31
2.6
1. Modified the parameters of “Input/Out Ports Setting”;
2. Added missing contents of “Fault Finding”.
2021-08-13
2.7
Added the fourth heavy consumer and other configurations.

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This manual is suitable for HMC6 Power Management controller only.
Table 2 - Notation Clarification
Sign
Instruction
NOTE
Highlights an essential element of a procedure to ensure correctness.
CAUTION!
Indicates a procedure or practice, which, if not strictly observed, could result in damage
or destruction of equipment.
WARNING!
Indicates a procedure or practice, which could result in injury to personnel or loss of life
if not followed correctly.
Х
Indicates the controller without this function.
●
Indicates the controller with this function.

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CONTENTS
1 OVERVIEW..............................................................................................................................................................6
2 PERFORMANCE AND CHARACTERISTICS...........................................................................................................6
3. FUNCTIONAL DESCRIPTION.................................................................................................................................7
3.1 OPERATION ......................................................................................................................................................7
3.2 ENGINE CONTROL............................................................................................................................................7
3.3 PROTECTIONS (ANSI)......................................................................................................................................7
3.4 DISPLAY ............................................................................................................................................................7
3.5 POWER MANAGEMENT FUNCTIONS..............................................................................................................8
4. SPECIFICATION .....................................................................................................................................................8
5. OPERATION............................................................................................................................................................9
5.1 PANEL DISPLAY................................................................................................................................................9
5.2 PUSHBUTTONS ............................................................................................................................................. 10
5.3 PARAMETERS SETTING................................................................................................................................ 11
6. DG SYSTEM MODE DESCRIPTION......................................................................................................................13
6.1 SYSTEM MODE .............................................................................................................................................. 13
6.1.1 MANUAL MODE .................................................................................................................................... 13
6.1.2 SEMI-AUTO MODE ................................................................................................................................ 13
6.1.3 AUTO MODE.......................................................................................................................................... 14
6.2 START MODE DESCRIPTION......................................................................................................................... 17
7. SG SYSTEM MODE DESCRIPTION......................................................................................................................18
7.1 SG SYSTEM MODE......................................................................................................................................... 18
7.1.1 MANUAL MODE ......................................................................................................................................... 18
7.1.2 SEMI-AUTO MODE..................................................................................................................................... 18
7.13 AUTO MODE................................................................................................................................................ 19
7.2 WORKING MODE DESCRIPTION ................................................................................................................... 20
8. PROTECTION........................................................................................................................................................20
9. HARDWARE STRUCTURE ....................................................................................................................................27
9.1 STRUCTURE DESCRIPTION .......................................................................................................................... 27
9.2 TERMINAL DESCRIPTION ............................................................................................................................. 27
9.2.1 SLOT#1 POWER SUPPLY AND RELAY OUTPUT PORT ...................................................................... 28
9.2.2 SLOT#2, SLOT #3 RELAY OUTPUT PORT ........................................................................................... 28
9.2.3 SLOT#4 CANBUS PORT, GOV ANALOG PORTAND AVR ANALOG PORT ......................................... 29
9.2.4 SLOT#5, SLOT #6, SLOT #7 GENERATOR VOLTAGE INPUT/BUSBAR VOLTAGE INPUT
/GENERATOR CURRENT INPUT PORT .............................................................................................................. 29
9.2.5 SLOT#8 DIGIAL INPUT, EXTERNAL FREQUENCY/VOLTAGE MODULATION INPUTS...................... 30
9.2.6 SLOT#9 RELAY OUTPUT PORT ........................................................................................................... 30
9.2.7 SLOT#10 RS485 COMMUNICATION PORT......................................................................................... 31
9.3 CONNECTION ................................................................................................................................................ 31
9.3.1 TYPICAL APPLICATION DIAGRAM...................................................................................................... 31
9.3.2 AC WIRE CONNECTION (3 PHASE 3 WIRE) ........................................................................................ 31
9.3.3 AC WIRE CONNECTION (SINGLE PHASE 2 WIRE).............................................................................. 32

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9.3.4 AC WIRE CONNECTION (2 PHASE 3 WIRE) ........................................................................................ 32
9.3.5 ANALOG INPUT..................................................................................................................................... 32
9.3.6 MSC LINK PORT.................................................................................................................................... 34
9.3.7 MSC APPLICATION DIAGRAM............................................................................................................. 34
10. POWER MANAGEMENT AND WORKFLOW CHART...........................................................................................35
10.1 EQUAL LOAD SHARING............................................................................................................................. 35
10.2 FIXED POWER OUTPUT............................................................................................................................. 35
10.3 SYNCHRONISING...................................................................................................................................... 36
10.4 HEAVY CONSUMER................................................................................................................................... 36
10.4.1 HEAVY CONSUMER REQUEST............................................................................................................. 36
10.4.2 HEAVY CONSUMER RESPONSE .......................................................................................................... 36
10.4.3 HEAVY CONSUMER PERMISSION....................................................................................................... 37
10.4.4 HEAVY CONSUMER FEEDBACK .......................................................................................................... 37
10.5 TRIP OF NON ESSENTIAL LOAD (NEL).......................................................................................................... 39
10.6 WORKFLOW CHART ....................................................................................................................................... 40
10.6.1 START UP................................................................................................................................................. 40
10.6.2 STOP......................................................................................................................................................... 41
10.6.3 CLOSE BREAKER...................................................................................................................................... 42
10.6.4 OPEN BREAKER ....................................................................................................................................... 43
10.6.5 HEAVY CONSUMER................................................................................................................................. 44
10.6.6 LIGHT CONSUMER .................................................................................................................................. 45
11. SCOPES AND DEFINITIONS OF PROGRAMMABLE PARAMETERS ..................................................................46
11.1 BUSBAR SETTING...................................................................................................................................... 46
11.2 TIMER SETTING......................................................................................................................................... 49
11.3 GENERATOR SETTING.............................................................................................................................. 50
11.4 GENERATOR LOAD SETTING.................................................................................................................... 54
11.5 GB SETTING............................................................................................................................................... 57
11.6 MODULE SETTING..................................................................................................................................... 58
11.7 INPUT PORTS SETTING ............................................................................................................................ 61
11.8 OUTPUT PORT SETTING........................................................................................................................... 66
11.9 SYNCHRONIZATION SETTING ................................................................................................................. 72
11.10 SYNCHRONOUS CALIBRATION................................................................................................................ 76
11.11 LOCAL SETTING........................................................................................................................................ 78
11.12 DIN16 SETTING......................................................................................................................................... 78
11.13 DOUT16 SETTING...................................................................................................................................... 80
11.14 LA16 SETTING........................................................................................................................................... 82
11.15 USER-DEFINED PROTOCAL SETTING ...................................................................................................... 83
12. COMMISSIONING.................................................................................................................................................85
12.1 STEP 1. SINGLE UNIT DEBUGGING .......................................................................................................... 85
12.2 STEP 2: SEMI-AUTO PARALLEL OPERATION OFF-LOAD........................................................................ 85
12.3 STEP 3: SEMI-AUTO PARALLEL OPERATION ON-LOAD ......................................................................... 85
12.4 STEP 4: AUTOMATIC PARALLEL OPERATION ........................................................................................ 85
13. INSTALLATION.....................................................................................................................................................86
14 FAULT FINDING....................................................................................................................................................87

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1OVERVIEW
The HMC6 power management controller is a standard power management system for marine
applications. The system carries out generator control, supervision and protection functions. The power
management functions are calculated by all diesel generator units, making the system a true multi-master
system. One of the diesel generator units is internally defined as the "command unit". This unit is the one
where start priority and other power management-related functions are calculated.
The system can handle up to 16 diesel generators to automatic synchronization and load sharing. Should
the command unit fails, the power management calculations will automatically be transferred to the next
available unit. The internal communication between the units is carried out via internal CANBUS. This CANBUS
is intended for internal communication use only and cannot be connected to other external CANBUS systems.
2PERFORMANCE AND CHARACTERISTICS
Dynamic synchronizing: detect the phase angle difference, voltage difference and frequency difference
automatically to perform synchronization as soon as possible.
Load sharing: schedule the start and stop of genset and share load equally automatically.
Heavy consumer control: start the additional genset automatically if the power is not enough when the
function is active.
NEL trip: trip some non-essential load if over power condition occurs.
Light load: the genset is still running if the load has fallen below the shutdown set value when the function
is active.
Multiple speed adjusting output ports, which including relay adjust speed output, voltage signal adjust
speed output, and current signal adjust speed output;
Multiple Voltage Adjusting output ports, which including relay adjust voltage output, voltage signal adjust
voltage output, and current signal adjust voltage output;
Fixed power output, which can be adjusted not only from the external voltage signal (±10V) for adjusting
speed/voltage, but also from configuring fixed power output or fixed power factor output;
Safety mode: reserve an additional unit running on load;
Control engine to start/stop;
Reserved running gensets: minimum number of loading gensets on the BUS bar;
Limit the maximum number of units on the network and maximum number of units carried with load on
the BUS bar;
Suitable for 3-phase 4-wire, 3-phase 3-wire, 2-phase 3-wire and single phase systems with frequency
50/60Hz;
PLC function: control logic can be defined by users as their requires;
Selectable start mode: cyclic start; linear start; duty time start;
Selectable scheduled start mode: it is can be chose according to the two ways including genset power
percentage and left power;
3-class password protection: containing two user-defined passwords for protecting user-defined
configuration parameters, which means users can configure parameters within the permission field;
480x272 LCD with backlight, multilingual interface (including English, Chinese and other languages) which
can be chosen at the site, making commissioning convenient for factory personnel;

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Parameter setting: parameters can be modified and stored in internal FLASH memory and cannot be lost
even in case of power outage; most of them can be adjusted using front panel of the controller and all of
them can be modified using PC via USB or RS485 ports;
Event Log：maximum 99 pieces of trip alarms, trip and stop alarms, start and stop, closing and opening
events can be saved in chronological sequence in internal memory, which means that they will not be lost
in case of power off.
3. FUNCTIONAL DESCRIPTION
3.1 OPERATION
●Diesel generators
●Load sharing between diesel generators
●Fixed power for diesel generator (asymmetrical load sharing)
●Heavy consumer control (fixed load)
●NEL (Non-essential Load) Trip
●Safety Mode (reserve an additional unit running on load)
3.2 ENGINE CONTROL
●Start/stop control
●GOV control: Relay outputs control, analog voltage control, analog current control
3.3 PROTECTIONS (ANSI)
●Overcurrent, 4 levels
●Reverse power, 2 levels
●Over power，2 levels
●Over voltage, 2 levels
●Under voltage, 3 levels
●Over and under frequency, 3 levels
●Unbalanced current
●Loss of excitation
●Close/Open Fail
●Digital inputs
3.4 DISPLAY
●Push-buttons for start and stop
●Push-buttons for auto/semi-auto mode transfer
●Push-buttons for breaker operations
●Push-buttons for highest priority
●Status, alarm and information text messages

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3.5 POWER MANAGEMENT FUNCTIONS
Plant operation:
●Diesel generator supply (up to 16 generators)
●Shore power supply (all gensets are inhibit to start and take on load)
Power management functions:
●Blackout handling
●Load-dependent start/stop
●Auto start mode selection
►Cyclic start
►Linear start
►Duty time start
●Auto scheduled start mode selection
►Genset power percentage
►Left power
●Priority Trip
●Heavy consumer
●Light consumer
●Reserved number of running gensets
●Safety stop, safety trip
●Safety mode (reserve an additional unit running on load)
●Limit network-connected gensets numbers
●Busbar breaking handle
4. SPECIFICATION
Table 3 –Specification Parameters
Parameter
Content
Working Voltage
DC8. 0V to 35. 0V, continuous power supply
Overall Consumption
<4W (Standby mode: ≤2W)
AC Input:
3 Phase 4 Wire
3 Phase 3 Wire
2 Phase 3 Wire
Single Phase
AC15V - AC360V (ph-N)
AC30V - AC620V (ph-ph)
AC15V - AC360V (ph-N)
AC15V - AC360V (ph-N)
Alternator Frequency
50Hz/60Hz
Flexible Relay Output
8A AC250V volts free output
GOV
DC(-10~10)V/(-20~20)mA
AVR
DC(-10~10)V /(-20~20)mA
FREQ IN
DC(-10~10)V
VOLT IN
DC(-10~10)V
Case Dimensions
266mm x 182mm x 45mm
Panel Cutout
214mm x 160mm
CT Secondary Current
Rated 5A

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Parameter
Content
Working Conditions
Temperature: (-25~+70)°C Humidity: (20~93)%RH
Storage Conditions
Temperature:(-25~+70)°C
Protection Level
IP65: when water-proof gasket installed between control panel and
enclosure.
Insulation Intensity
Apply AC2.2kV voltage between high voltage terminal and low voltage
terminal;
The leakage current is not more than 3mA within 1min.
Weight
0.95kg
5. OPERATION
5.1 PANEL DISPLAY
TFT LCD: 4.3 inches with 480x272 resolutions, as follows:
Fig.1 –HMC6 Panel Drawing

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5.2 PUSHBUTTONS
Table 4 –Push Buttons Description
Icons
Keys
Description
Stop
Stop the running generators in Semi-auto mode.
Lamp test (press at least 3s);
Start
Start the standby generators in Semi-auto mode.
Semi-auto mode
Press this key and controller enters Semi-auto mode.
Auto Mode
Press this key and controller enters Auto mode.
Priority selection
Place the generator at the highest priority and start the generator
the earliest.
Close
The unit will close the circuit breaker in Semi-auto mode.
Open
The unit will open the circuit breaker in Semi-auto mode.
Up/Increase
1. Screen scroll;
2. Up cursor and increase value in setting menu.
Down/Decrease
1. Screen scroll;
2. Down cursor and decrease value in setting menu.
Left
1. Screen scroll;
2. Left move cursor in setting menu.
Right
1. Screen scroll;
2. Right move cursor in setting menu.
Set/Confirm
1. Enter “Help” interface.
2. Press it more than 3s and enter parameter setting menu;
3. In setting menu, confirm the set value.
Exit
1. Return to main menu;
2. Return to previous menu in setting menu.

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5.3 PARAMETERS SETTING
Press key for more than 3s to enter into user manual.
★Parameter
After entering the correct password (factory default password is 00318) you can enter parameter settings
screen.
Password can be divided into 3 levels: one highest level and two user-defined levels. After entering highest
level password, all configuration items can be set; after entering user-defined level password, users can only
configure parameters within the permission field
Parameter setting including as following,
★Bus setting
★Timers setting
★Generator setting
★Generator load setting
★GB setting
★Digital inputs setting
★Relay outputs setting
★Module setting
★Synchronization setting
★Synchronous calibration
★Local module setting
★DIN16-1 setting
★DIN16-2 setting
★DOUT16-1 setting
★DOUT16-2 setting
★LA16-1 setting
★LA16-2 setting
Example:
Return
Bus setting
>Start Delay
>Stop Delay
>Start Output Delay
>Stop Output Delay
>Start Wait Delay
>Stop Wait Delay
>Onload Stable Delay
>Transient Fault Delay
>Heavy Consumer Delay
>Alarm Start Delay
>Trigger Start Delay
Form 1: Use to scroll settings,
to enter settings (form 2), to exit
settings menu.
Timers setting >
Generator setting
Generator Load setting
Breaker setting
Input setting
Output setting
Module setting
Synchronization setting
Synchronous calibration

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Return
Bus setting
> Start Delay
Form 2: Use to scroll settings,
to enter settings, to return to previous
menu. (form 1)
> Stop Delay
> Start Output Delay
> Stop Output Delay
>Start Wait Delay
>Stop Wait Delay
>Onload Stable Delay
>Transient Fault Delay
>Heavy Consumer Delay
>Alarm Start Delay
>Trigger Start Delay
Timers setting >
Generator setting
Generator Load setting
Breaker setting
Input setting
Output setting
Module setting
Synchronization setting
Synchronous calibration
Return
Bus setting
> Start Delay
> Stop Delay
> Start Output Delay
> Stop Output Delay
>Start Wait Delay
>Stop Wait Delay
>Onload Stable Delay
>Transient Fault Delay
>Heavy Consumer Delay
>Alarm Start Delay
>Trigger Start Delay
Form 3: Use to scroll settings,
to confirm settings (form 4), to return
to previous menu. (form 1)
Timers setting >
Generator setting
Generator Load setting
Breaker setting
Input setting
Output setting
Module setting
Synchronization setting
Synchronous calibration
> Start Delay
00005
Form 4：Press to enter settings (form
5), to return to previous menu. (form 4).
> Stop Delay
> Start Output Delay
> Stop Output Delay
>Start Wait Delay
>Stop Wait Delay
>Onload Stable Delay
>Transient Fault Delay
>Heavy Consumer Delay
>Alarm Start Delay
>Trigger Start Delay
>Alarm Shutdown Delay

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> Start Delay
> Stop Delay
> Start Output Delay
> Stop Output Delay
>Start Wait Delay
>Stop Wait Delay
>Onload Stable Delay
>Transient Fault Delay
>Heavy Consumer Delay
>Alarm Start Delay
>Trigger Start Delay
>Alarm Shutdown Delay
00005
Form 5: Press to change cursor
position, are used for changing
cursor value, to confirm setting and the
setting will be stored in internal FLASH
memory automatically; to exit setting.
NOTE: Pressing for a long time can exit setting directly during setting.
6. DG SYSTEM MODE DESCRIPTION
6.1 SYSTEM MODE
6.1.1 MANUAL MODE
When manual mode signal is active, the system will work through manual mode. In this mode, HMC6
controller can only monitor data and alarm information but cannot control switch or engine. In addition, GOV
and AVR do not work but the manual governor IN, manual governor OUT, manual VOLT IN and manual VOLT
OUT do work in this mode.
6.1.2 SEMI-AUTO MODE
Semi-auto mode is activated by pressing key; Semi-auto means that the unit will not initiate any
sequences automatically, as is the case with the auto mode. It will only initiate sequences, if external signals
are given.
An external signal may be given in three ways:
1. Push-buttons on the display are used
2. Digital inputs are used
3. Modbus commands are used
In semi-auto mode, all available diesel generator units can be started/stopped/synchronizing
closed/unloaded open upon push-button commands on the front panels for each generator.
The system monitors that if the generators are overloaded. Should that be the case, the Non Essential
Load (NEL) trip will activate to maintain power supply to the main busbar.
If a heavy consumer is requested, the system calculates the power needed. If the available power is
insufficient, the heavy consumer connection will not be allowed.
Semi-auto Start：
a) Start command will be initiated by HMC6 after pressing button . The system enters into “Start
Output Delay” while the start relay will activate;

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b) When Start Output Delay is over, Start Wait Delay will be initiated. Fail to Start alarm will be initiated if the
on-load requirement has Not been achieved after the Start Wait Delay has expired. The alarm type of Fail to
Start is block which means users can restart the generator only when the alarm is acknowledged;
c) When Start Wait Delay is over, Load Stability Delay will be initiated. F/V Fault alarm will be initiated if the
on-load requirement has Not been achieved after the Load Stability Delay has expired. The alarm type of
F/V Fault is block which means users can restart the generator only when the alarm is acknowledged.
However, it enters into “Normal Running” status if the onload requirement has been achieved;
d) If the switch is not closed during the normal running status and the voltage/frequency has not satisfied the
on-load requirement suddenly, Transient Fault Delay will be initiated. F/V Fault alarm will be initiated if the
on-load requirement has Not been achieved after the Transient Fault Delay has expired. The alarm type of
F/V Fault is block which means users can restart the generator only when the alarm is acknowledged;
e) If the on-load requirement has been achieved (Generator normal light will illuminate), the genset will close
and synchronize automatically after pressing the button;
f) In case of multi-set operation, the genset will share load automatically;
g) If there is trip or shutdown alarm occurs, then the system will open switch or stop and the alarm
information will be displayed on the LCD;
Semi-auto Stop：
a) In breaker close status, press open button , in case of multi-set operation, first of all, the system will
transfer load and open breaker; in case of single unit running, it will open breaker directly;
b) After breaker opened or in breaker open status, press stop button , system will enter into “Stop
Output Delay” while the stop relay will activate;
c) After “Stop Output Delay”, system will enter into “Wait for Stop” delay. If genset voltage and frequency
signals disappeared during the delay, controller will judge that the genset stopped and in standby state;
otherwise, if genset voltage and frequency signals still can be detected after the delay expired, controller
will judge that the genset failed to stop;
d) After genset failed to stop, if voltage and frequency signals are disappeared, controller will judge that the
genset stopped completely and entered into standby state.
6.1.3 AUTO MODE
Auto mode is activated by pressing key;
All available diesel generator units are controlled by the power management system and are started and
stopped according to the start priority and the actual busbar load. Should a running generator develop an
alarm, the system will start the next generator in line and synchronize its breaker before taking the failing
generator out of service. At the same time, the system monitors that the generators are not overloaded. Should
that be the case, the Non Essential Load (NEL) trip will activate to maintain power supply to the main busbar.
If a heavy consumer is requested, the system calculates the power needed and starts an additional
generator if needed before allowing the heavy consumer to be connected.
Auto Start Rules
a) If the system detects that there is no voltage signal on busbar, then the available diesel generator units
are started according to the start priority;

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b) Should the generator units are started successfully, the system will start the next generator in line if the
power is insufficient;
c) Should the generator units are in normal running, if a heavy consumer is requested, the system calculates
the power needed and starts additional gensets to satisfy the requires;
d) If there trip and fault shutdown alarms occur, the corresponding number of units are automatically
started to meet the load requirements;
e) Linear start mode: if generator’s priority level changes, higher priority level standby genset will be started;
f) Duty time start mode: gensets will be started according to the duty-hour.
Auto Start
a) Generator enters into “start delay” as soon as “Auto Start” is active;
b) After the Start Delay has expired, the system enters into “Start Output Delay”while the start relay will
activate;
c) When start delay is over, “Start Wait Delay”will be initiated. “Fail to Start”latched alarm will be initiated if
the collected generator voltage and frequency can not meet with on-load requirement after the “Start
Wait Delay”has expired;
d) If on-load requirement been satisfied in “Start Wait Delay”, “Load Stability Delay”will be initiated. “F/V
Fault”alarm will be initiated if the on-load requirement has Not been achieved after the “Load Stability
Delay”has expired. The alarm type of “F/V Fault”is latched which means users can restart the generator
only when the alarm is acknowledged. However, it enters into “Normal Running” status if the on-load
requirement has been achieved;
e) If the switch is not closed during the normal running status and the voltage/frequency has not satisfy
the on-load requirement suddenly, “Transient Fault Delay”will be initiated. “F/V Fault” latched alarm will
be initiated if the on-load requirement has not been achieved after the “Transient Fault Delay”has
expired. If the on-load requirement has been achieved within delay time, genset will enter into “Normal
Running” state;
f) After controller entering into normal running state, and mean while on-load requirement has been
achieved (generator normal light will illuminate), the genset will close and synchronize automatically;
g) In case of multi-set operation, the genset will share load automatically;
h) If there is trip alarm or shutdown alarm occurs, then the system will trip or shutdown and the alarm
information will be displayed on the LCD.
Auto Stop Rules
a) In multiple gensets running system, if the system detects that the load power has fallen below the stop
power, the controller will transfer load according to the start priority firstly and then open breaker and
shutdown;
b) If there is trip alarm or shutdown alarm occurs, the fault genset breaker will be opened and shutdown;
c) If there is safe trip alarm or safe shutdown alarm occurs, the fault genset will be unloaded and open
breaker to stop after new genset started up and on-load requirement of the busbar is satisfied;
d) Linear start mode: if generator’s priority level changes, after higher priority level standby genset started
up, in case of load power falls below shutdown power, genset will be unloaded and open breaker to stop;
e) Duty time start mode: gensets will be stopped according to the duty-hour.
Auto Stop
a) When stop input is activated in auto mode, system enters into “Stop Delay” state;
b) After “Stop Delay” is expired, in case of multi-set operation, genset will be opened after transferring the
load;

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c) After the switch is opened, the system enters into “Stop Output Delay” while the stop relay will activate;
d) After “Stop Output Delay” expired, system enters into “Wait for Stop Delay”, If genset voltage and
frequency signals disappeared during the delay, controller will judge that the genset stopped and in
standby state; otherwise, if genset voltage and frequency signals still can be detected after the delay
expired, controller will judge that the genset failed to stop;
e) After genset failed to stop, if voltage and frequency signals are disappeared, controller will judge that the
genset stopped completely and entered into standby state.
Table 5 - System Modes Description
System Mode
Start Condition & GOV/AVR Interface
Trip or Stop Condition
Manual
Mode
Start the gensets externally, GOV input, GOV
output, AVR input and AVR output are active;
monitor all generator parameters.
Trip and stop the gensets externally.
Semi-auto
Mode
Start the gensets by pressing the panel button,
GOV input and AVR input are deactivated; The
system will control GOV and AVR automatically.
Stop the gensets by pressing the “Stop”
panel button or there is “trip and stop”
alarm occurs.
Auto Mode
If the system detects that there is no voltage
signal on busbar, the available diesel generator
units are started according to the start priority or
duty time (details please to see “Auto Start
Rules”). GOV input and AVR input are
deactivated; The system will control GOV and
AVR automatically.
Stop the gensets when there is “trip and
stop” alarm occurs.
In multiple gensets running system, the
system will shutdown if the load value
has fallen below the minimum set value.
In duty time start mode, genset will stop
when duty time is up. (details please to
see “Auto Start Rules”)

HMC6 Power Management Controller User Manual Page 17 of 87
6.2 START MODE DESCRIPTION
Table 6 –Start Modes Description
Start Mode
Start Method
Stop Method
Auto
Mode
Semi-auto
Mode
Manual
Mode
Linear Start
Start the gensets
according to the set
priority. The highest priority
(the minimum number) will
be started earliest;
following the second
highest priority will be
started.
E.g. the start sequence of 3
units: 1-2-3.
Stop the gensets
according to the “Last in
first out” sequence.
E.g. the stop sequence of
3 units: 3-2-1.
●
Х
Х
Cyclic Start
Start the gensets
according to the set priority
and sequence. The highest
priority (the minimum
number) will be started
earliest, following the
second highest priority will
be started.
E.g. the start sequence of 3
units: 1-2-3.
Stop the gensets
according to the “First in
first out” sequence.
E.g. the stop sequence of
3 units: 1-2-3.
●
Х
Х
Duty Time
Mode
The gensets which has the
shortest running hours will
be started earliest.
If the started genset runs
for up to preset hours, then
the additional genset which
has the shortest running
hours at this time will be
started.
The gensets which has
the longest running
hours will be stopped
earliest.
Running hours will be
stored in internal
memory and cannot be
lost even in case of
power outage;
●
Х
Х

HMC6 Power Management Controller User Manual Page 18 of 87
7. SG SYSTEM MODE DESCRIPTION
7.1 SG SYSTEM MODE
7.1.1 MANUAL MODE
When Manual mode signal is active, the system will work through manual mode. In this mode, HMC6
controller can only monitor data and alarm information but cannot control switch or engine. In addition, GOV
and AVR do not work but the manual governor IN, manual governor OUT, manual VOLT IN and manual VOLT
OUT do work in this mode.
7.1.2 SEMI-AUTO MODE
Semi-auto mode is activated by pressing key (or by semi-auto mode switch); Semi-auto means that
the unit will not initiate any sequences automatically, as is the case with the auto mode. It will only initiate
sequences, if external signals are given.
An external signal may be given in three ways:
1. Push-buttons on the display are used
2. Digital inputs are used
3. Modbus commands are used
In semi-auto mode, all available diesel generator units can be started/stopped/synchronizing
closed/unloaded open upon push-button commands on the front panels for each generator.
The system monitors that if the generators are overloaded. Should that be the case, the Non Essential
Load (NEL) trip will activate to maintain power supply to the main busbar.
If a heavy consumer is requested, the system calculates the power needed. If the available power is
insufficient, the heavy consumer connection will not be allowed.
Semi-auto Start：
a) Press the start button , the controller firstly judges the feedback state of the shaft solenoid
valve closing (if configured). If the state is not detected, the shaft solenoid valve closing outputs (if
configured) and will be waited for the feedback state to be effective;
b) After the feedback signal of shaft solenoid valve closing is detected, HMC6 initiates a start command
and the system enters the "start output" delay, during which the engine starts relay output;
c) When Start Output Delay is over, Start Wait Delay will be initiated. Fail to Start alarm will be initiated if
the onload requirement has Not been achieved after the Start Wait Delay has expired. The alarm type
of Fail to Start is block which means users can restart the generator only when the alarm is
acknowledged;
d) When Start Wait Delay is over, Load Stability Delay will be initiated. F/V Fault alarm will be initiated if
the onload requirement has Not been achieved after the Load Stability Delay has expired. The alarm
type of F/V Fault is block which means users can restart the generator only when the alarm is
acknowledged. However, it enters into “Normal Running” status if the onload requirement has been
achieved;
e) If the switch is not closed during the normal running status and the voltage/frequency has not
satisfied the on-load requirement suddenly, Transient Fault Delay will be initiated. F/V Fault alarm will
be initiated if the on-load requirement has Not been achieved after the Transient Fault Delay has

HMC6 Power Management Controller User Manual Page 19 of 87
expired. The alarm type of F/V Fault is block which means users can restart the generator only when
the alarm is acknowledged;
f) If the on-load requirement has been achieved (Generator normal light will illuminate), the shaft genset
will close and synchronize automatically after pressing the button;
g) It will judge whether the SG power can meet receiving all the DG power when closing in load receiving
mode. If not, the controller will initiates an alarm and stop the closing operation. If it meets the
requirements, the DG will open and stop after all the loads are received by the SG (DG is effective in
auto mode); In a fixed power mode, the controller synchronously closes and operates at a fixed power
and grid connection with DG;
h) If there is trip alarm occurs, then the system will open switch and the alarm information will be
displayed on the LCD.
Semi-auto Stop：
a) Press open button in close status or input port of DG with load is effective, the system will
dispatch the DG starting ( DG is effective in auto mode), judging whether DG power will meet receiving
all the SG power, if not, controller will initiate an alarm and stop operations, if it meets the
requirements, soft unloading transferred and opened by SG first;
b) After breaker opened or in breaker open status, press stop button , system will enter into
“Stop Output Delay” while the stop relay will activate;
c) After “Stop Output Delay”, system will enter into “Wait for Stop” delay. If genset voltage and frequency
signals disappeared during the delay, controller will judge that the genset stopped and in standby
state; otherwise, if genset voltage and frequency signals still can be detected after the delay expired,
controller will judge that the genset failed to stop;
d) After genset failed to stop, if voltage and frequency signals are disappeared, controller will judge that
the genset stopped completely and entered into standby state.
7.13 AUTO MODE
Auto mode is activated by pressing key (or by auto mode switch).
The start/stop, opening/closing sequence of auto mode is the same as the semi-auto mode, except for the
automatic mode. The buttons on the panel have no effect and can only be operated through the input port.
When DG is loaded, SG will start and close automatically when the input of SG is effective with load, and
DG will automatically unload and stop;
When SG is loaded, DG will start and close automaticlly when the input of DG is effective with load, and SG
will automaticlly unload and stop;
In fixed power mode, SG will automatically start and connect to the grid with DG when the input of SG is
effective with load;
In load sharing mode, SG will automatically start and connect to the grid with DG when the input of SG is
effective with load;

HMC6 Power Management Controller User Manual Page 20 of 87
7.2 WORKING MODE DESCRIPTION
Table 7–Working Mode
Working
Mode
Description
Auto
Mode
Semi-auto
Mode
Manual
Mode
Load
Receiving
Mode
After SG closing, all loads will be transferred to
SG side, DG opens and stops;
When SG opens, all loads will be transferred to
DG side, SG opens and stops.
●
●
Х
Fixed Power
Mode
After SG closing, SG shares with parts of loads,
DG shares the rest of power;
When SG opens, all load will be transferred to DG
side, SG opens and stops.
●
●
Х
Load
Sharing
Mode
After SG closing, loads will be shared by SG and
DG;
When SG opens, all loads will be transferred to
DG side, SG opens and stops.
●
●
Х
Note: When in SG mode, outputs of GOV and AVR should be set as “none” if SG can not achive speed
governing.
8. PROTECTION
Generator protection, busbar protection, current protection, power protection and switch protection can be
provided by HMC6. Each kind of protection can configure one or more relays output.
Table 8 –Controller Alarm types
Alarm Type/Action
Buzzer
Display
Unload
Trip
Shutdown
Start
Block
●
●
Х
Х
Х
Х
Warn
●
●
Х
Х
Х
●
Safety Trip
●
●
●
●
Х
Х
Safety Stop
●
●
●
●
●
Х
Trip
●
●
Х
●
Х
Х
Trip and Stop
●
●
Х
●
●
Х
Each alarm can be removed only when it is acknowledged and all alarm information will be cleared
automatically if the data is beyond the alarm scope after acknowledged. Users also can remove the alarm by
“Alarm Reset” auxiliary input port.