Woodward GCP-30 Series User manual

37238D
Function/Operation
Software version 4.3xxx
Manual 37238D
GCP-30 Series
Genset Control

Manual 37238D GCP-30 Series - Genset Control
Page 2/39 © Woodward
WARNING
Read this entire manual and all other publications pertaining to the work to be performed before install-
ing, operating, or servicing this equipment. Practice all plant and safety instructions and precautions.
Failure to follow instructions can cause personal injury and/or property damage.
The engine, turbine, or other type of prime mover should be equipped with an overspeed (overtempera-
ture, or overpressure, where applicable) shutdown device(s), that operates totally independently of the
prime mover control device(s) to protect against runaway or damage to the engine, turbine, or other
type of prime mover with possible personal injury or loss of life should the mechanical-hydraulic gov-
ernor(s) or electric control(s), the actuator(s), fuel control(s), the driving mechanism(s), the linkage(s),
or the controlled device(s) fail.
Any unauthorized modifications to or use of this equipment outside its specified mechanical, electrical,
or other operating limits may cause personal injury and/or property damage, including damage to the
equipment. Any such unauthorized modifications: (i) constitute "misuse" and/or "negligence" within
the meaning of the product warranty thereby excluding warranty coverage for any resulting damage,
and (ii) invalidate product certifications or listings.
CAUTION
To prevent damage to a control system that uses an alternator or battery-charging device, make sure
the charging device is turned off before disconnecting the battery from the system.
Electronic controls contain static-sensitive parts. Observe the following precautions to prevent dam-
age to these parts.
•Discharge body static before handling the control (with power to the control turned off, contact a
grounded surface and maintain contact while handling the control).
•Avoid all plastic, vinyl, and Styrofoam (except antistatic versions) around printed circuit boards.
•Do not touch the components or conductors on a printed circuit board with your hands or with
conductive devices.
OUT-OF-DATE PUBLICATION
This publication may have been revised or updated since this copy was produced. To verify that you
have the latest revision, be sure to check the Woodward website:
http://www.woodward.com/pubs/current.pdf
The revision level is shown at the bottom of the front cover after the publication number. The latest
version of most publications is available at:
http://www.woodward.com/publications
If your publication is not there, please contact your customer service representative to get the latest
copy.
Important definitions
WARNING
Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that, if not avoided, could result in damage to equipment.
NOTE
Provides other helpful information that does not fall under the warning or caution categories.
Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is believed to be
correct and reliable. However, Woodward assumes no responsibility unless otherwise expressly undertaken.
© Woodward
All Rights Reserved.

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 3/39
Revision History
Rev. Date Editor Changes
NEW 04-06-02 Tr Release
A 04-09-23 TP Minor corrections, functionality from V4.3xxx updated
B 05-06-15 TP Appendix Parameters and Set Points added, various minor corrections
Description GCP-31 RPQ-SC08 (Rental Package) added
C 06-01-11 TP Various minor corrections
D 07-02-07 TP Various minor corrections; linguistic review
Contents
CHAPTER 1. GENERAL INFORMATION.........................................................................................5
CHAPTER 2. DISPLAY AND OPERATING ELEMENTS ....................................................................8
Brief Explanation Of The LEDs and Buttons...........................................................................................9
LEDs.............................................................................................................................................9
Buttons..........................................................................................................................................9
Others...........................................................................................................................................9
Functional Overview..............................................................................................................................10
LEDs......................................................................................................................................................11
Buttons..................................................................................................................................................13
General / Configuration...............................................................................................................13
Circuit Breaker Operation...........................................................................................................14
Operating Mode Selection..........................................................................................................15
LC Display.............................................................................................................................................18
CHAPTER 3. DISPLAY ..............................................................................................................19
Measured Values..................................................................................................................................19
Top Display Line.........................................................................................................................19
Bottom Display Line....................................................................................................................20
Direction Of Power......................................................................................................................22
Power Factor Definition ..............................................................................................................22
Service Display .....................................................................................................................................24
Control Function Messages..................................................................................................................25
Counters................................................................................................................................................28
Reset Maintenance Call..............................................................................................................28
CHAPTER 4. ALARM MESSAGES ..............................................................................................29
Alarm Classes.......................................................................................................................................29
Acknowledge Alarm Messages.............................................................................................................30
Short Acknowledgement (< 2,5 s) ..............................................................................................31
Long Acknowledgement (> 2,5 s)...............................................................................................31
Alarm Messages.........................................................................................................................32
APPENDIX A. CODE LEVEL ACCESS PERMISSIONS...................................................................38
Code Level 0 or No Code Level .................................................................................................38
Code Level 1...............................................................................................................................38
Code Level 2...............................................................................................................................38

Manual 37238D GCP-30 Series - Genset Control
Page 4/39 © Woodward
Illustrations And Tables
Illustrations
Figure 2-1: Front panel GCP-31 ................................................................................................................................................ 8
Figure 2-2: Front panel GCP-32 ................................................................................................................................................ 8
Figure 3-1: Direction of power ................................................................................................................................................ 22
Tables
Table 1-1: Manual - Overview................................................................................................................................................... 5
Table 2-1: Functional overview ............................................................................................................................................... 10
Table 2-2: Function – external operation mode selection ........................................................................................................ 17
Table 4-1: Alarms – Short acknowledgement.......................................................................................................................... 31
Table 4-2: Alarms – Long acknowledgement - Table for warning alarms............................................................................... 31
Table 4-3: Alarms – Long acknowledgement - Table for alarms causing a shutdown ............................................................ 31
Table 4-4: Alarms – Text messages......................................................................................................................................... 32

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 5/39
Chapter 1.
General Information
Type English German
GCP-31/32 Series
GCP-31/32 Packages - Installation 37364 GR37364
GCP-31/32 Packages - Configuration 37365 GR37365
GCP-31/32 - Function/Operation this manual Ö37238 GR37238
GCP-31/32 - Application 37240 GR37240
Option SB - Caterpillar CCM coupling 37200 GR37200
Option SC06/SC07/SC08 - CAN bus coupling 37313 GR37313
Option SC09/SC10 - CAN bus coupling 37382 GR37382
Additional Manuals
IKD 1 - Manual 37135 GR37135
Discrete expansion board with 8 discrete inputs and 8 relay outputs that can be coupled via the CAN bus to the control unit. Evalua-
tion of the discrete inputs as well as control of the relay outputs is done via the control unit.
LeoPC1 - Manual 37146 GR37146
PC program for visualization, for configuration, for remote control, for data logging, for language upload, for alarm and user man-
agement and for management of the event recorder. This manual describes the use of the program.
LeoPC1 - Manual 37164 GR37164
PC program for visualization, for configuration, for remote control, for data logging, for language upload, for alarm and user man-
agement and for management of the event recorder. This manual describes the programming of the program.
GW 4 - Manual 37133 GR37133
Gateway for transferring the CAN bus to any other interface or bus.
ST 3 - Manual 37112 GR37112
Control to govern the air fuel ratio of a gas engine. The ratio will be directly measured though a Lambda probe and controlled to a
configured value.
Table 1-1: Manual - Overview

Manual 37238D GCP-30 Series - Genset Control
Page 6/39 © Woodward
The GCP-30 series generator set controllers provide the following functions:
•Engine and generator protection
•Engine data measurement -
○including oil pressure and temperature, coolant temperature, battery voltage, speed,
service hours, etc.
•Generator data measurement -
○including. voltage, current, power, kvar, kW, kWh, etc.
•Engine start/stop logic
•Alarm display with breaker trip and engine shutdown
•Emergency operation for mains failure recognition and automatic engine start incl. transfer logic
•Control of voltage, frequency, real power and reactive power
•Real power and reactive power load sharing including load management with automatic start/stop of addi-
tional generators.
•Synchronization of one or two circuit breakers
•CAN bus communications to engine controllers and plant management systems
Type designation is as follows:
GCP- 32 45 -h0018 B/ BPD+ABDEF..Z
Options.
A description of the options on the unit may be found in the man-
ual corresponding to the listed options. The chapter heading indi-
cates whether a described option is standard in every device or
only available as an option.
Package
A description of the unit packages may be found in the manual
corresponding to the listed control. The chapter heading indicates
whether a described function is available in a package.
Assembly type
[B]..Installs in cabinet panel door
Hardware variation
derivative types; e.g. green display, additional relays
Current transformer, secondary
[5] = ../5 A
Potential transformer, maximum secondary voltage
[1] = 100 Vac
[4] = 400 Vac
Model
[-31] = Model with 1 circuit breaker
[-32] = Model with 2 circuit breakers
Type
Examples:
•GCP-3245B/XPQ+SC10 (GCP-32 with 400 Vac PT inputs and ../5 A CT inputs, Package XPQ with Option
SC10)
•GCP-3115B/BPQ (GCP-31 with 100 Vac PT inputs and ../5 A CT inputs, Package BPQ without options)

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 7/39
Intended Use The unit must only be operated according to the guidelines described in this manual. The prerequi-
site for a proper and safe operation of the product is correct transportation, storage, and installation as well as
careful operation and maintenance.
NOTE
This manual has been developed for a unit fitted with all available options. Inputs/outputs, functions,
configuration screens and other details described, which do not exist on your unit may be ignored.
The present manual has been prepared to enable the installation and commissioning of the unit. On
account of the large variety of parameter settings, it is not possible to cover every possible combina-
tion. The manual is therefore only a guide. In case of incorrect entries or a total loss of functions, the
default settings can be taken from the enclosed list of parameters.

Manual 37238D GCP-30 Series - Genset Control
Page 8/39 © Woodward
Chapter 2.
Display And Operating Elements
The pressure-sensitive membrane of the front panel consists of a plastic coating. All keys have been designed as
touch-sensitive membrane switch elements. The display is an LC display, comprised of two rows with 16 charac-
ters in each row that are indirectly illuminated in red. The contrast of the display can be infinitely adjusted via a
rotary potentiometer positioned on the left side of the control. The direct configuration port is located on the left
side of the unit. The direct configuration cable (DPC) will connect there.
V / kV A (L1) A (L2) A (L3)
Operating and Alarm Messages
A
UTO MAN TEST STOP
RESET
Setpoint
ON Mains Parallel
Automatic Manual Protection Alarm
V1
V2
V3
Stop
Genset Control Package GCP-30
ON
OFF STOP
272625242321 2218171615
11
1
2
3
4
5
10
29
6
78 928
13
12
14
30
Figure 2-1: Front panel GCP-31
V / kV A (L1) A (L2) A (L3)
Operating and Alarm Messages
A
UTO MAN TEST STOP
RESET
Setpoint
ON ON
Automatic Manual Protection
V1
V2
V3
Stop
Genset Control Package GCP-30
ONON
OFF OFF STOP
272625242320 21 2218 19171615
11
1
2
3
4
5
10
29
6
78 928
13
12
14
30
Figure 2-2: Front panel GCP-32

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 9/39
Brief Explanation Of The LEDs and Buttons
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
LEDs
No Description Function
1V1 Voltage L1
2V2 Voltage L2
3V3 Voltage L3
4Stop "STOP" mode selected
5-10%..fn..+10% Synchroscope
6Automatic "AUTOMATIC" mode selected
7Manual "MANUAL" mode selected
8Protection Fault monitoring is enabled
9Alarm Alarm message present
10 ON (GCB ON) Reply: GCB is closed
11 ON (MCB ON) [GCP-32] Reply: MCB is closed
[GCP-31] Status message: unit is operating in "Mains parallel"
Buttons
No Description Function
12 Message↓Advance to next message/screen
12 Select Confirm selection
13 Display↓Switch display
13 Digit↑Increase digit
14 Setpoint Display set point value
14 Cursor→Move cursor one position to the right
15 Setpoint↑Increase displayed set point value
16 Setpoint↓Reduce displayed set point value
17 ON (GCB ON) Close GCB manually
18 OFF (GCB OFF) Open GCB manually
19 ON (MCB ON) [GCP-32] Close MCB manually
20 OFF (MCB OFF) [GCP-32] Open MCB manually
21 AUTO Enable "AUTOMATIC" mode
22 MAN Enable "MANUAL" mode
23 START Start engine manually
24 STOP Stop engine manually
25 TEST Activate "TEST" mode
26 STOP Stop engine automatically
27 RESET Acknowledge alarm messages
Others
No Description Function
28 LC-Display LC-Display
29 DPC plug Configuration plug
30 Potentiometer Adjust LCD contrast

Manual 37238D GCP-30 Series - Genset Control
Page 10/39 © Woodward
Functional Overview
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Mode functions
RESET STOP MAN AUTO TES T STOP ON OFF ON
OFF
Engine GCB MCB Setpoint
Message Display Set point Acknowledge STOP MANUAL AUTOMATIC TEST Start Stop Close Open Close Open Raise Lower
MANUAL Mode
Start engine
n o
Stop engine
X n
o
Close GCB
n o
Open GCB
n o
[GCP-32] Close MCB
n o
[GCP-32] Open MCB
n o
Raise set point value
o n p
Lower set point value
o n p
AUTOMATIC Mode
**) Start engine
n
**) Stop engine
Xn
**) Close GCB
n
**) Open GCB
n
[GCP-32] **) Close MCB
n
[GCP-32] **) Open MCB
n
Raise set point value
o n p
Lower set point value
o n p
TEST Mode
Start engine
n
Start load test
n o
End load test
n
[GCP-32] *) End load test n*n*
Raise set point value
o n p
Lower set point value
o n p
Mode STOP
n
LED test
nn
Configuration
Select Digit Cursor
Enable configuration mode nn
Confirm and advance to next screen n
Return to previous screen nn
Next position/change text
n
Increase digit n
End configuration mode nn
*) Depending on configured breaker transfer logic
**) A discrete input must be energized or the operational mode will dictate a logical condition for the required action
nopPress the buttons in the order indicated by the bullets
nnPress the buttons simultaneously
X: Pressing the STOP button changes the operating mode and stops the generator
Table 2-1: Functional overview

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 11/39
LEDs
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
NOTE
The LEDs can be checked via a lamp test. In order to achieve this, the "Setpoint↑" and "Setpoint↓" but-
tons must be pressed simultaneously.
1
2
3
V1 - V2 - V3
Color: green
Voltage control
The LEDs "V1", "V2" and "V3" indicate which voltage (VL1N, VL2N, VL3N,
VL12, VL23 or VL31) is currently being displayed. This applies both to the gen-
erator and the mains voltage display.
4 Stop
Color: red
"STOP" operating mode
If the "STOP" LED is illuminated, the "STOP" mode has been enabled. If
this LED is flashing, engine speed has been detected while the control is in
the "STOP" mode.
5 -10%..fN..+10%
Color: red/yellow/green
Phase angle / synchroscope
Normal operation: The LEDs between -10 % and +10 % display the gen-
erator frequency differential relative to the frequency of the
system that the generator is synchronizing with. If the fre-
quency differential is greater than +10 % or less than -10 %
the corresponding outer LED will flash.
Configuration: If the control is in the configuration mode and the service
display is configured "ON", the LEDs show the phase angle
between the systems being synchronized when the double
voltage/double frequency screen is displayed. The green LED
in the center of the 15 LEDs indicates that the measured phase
angle between the voltage systems displayed is less than 12 °
electrical. The phase angle is only displayed if the frequencies
of the two voltages are within the following permissible lim-
its:
Generator 88 to 112 % of rated frequency (fN)
Mains 96 to 104 % of rated frequency (fN)
A distinction is made between two directions of rotation:
-10 % →+10 % = If the LEDs illuminate from left to right, the generator
frequency is greater than the synchronizing frequency (i.e. the
generator is synchronizing in the fast direction).
+10 % →-10 % = If the LEDs illuminate from right to left, the generator
frequency is lower than the synchronizing frequency (i.e. the
generator is synchronizing in the slow direction).
6 Automatic
Color: yellow
"AUTOMATIC" operating mode
If the "AUTOMATIC" LED is illuminated, the "AUTOMATIC" operating
mode is enabled. The "Setpoint↑", "Setpoint↓", "GCB ON", "GCB OFF",
"MCB ON", "MCB OFF", "START", and "STOP" buttons are disabled.

Manual 37238D GCP-30 Series - Genset Control
Page 12/39 © Woodward
7 Manual
Color: yellow
"MANUAL" operating mode
If the "Manual" LED is illuminated, the "MANUAL" operating mode has
been enabled. The circuit breaker control, "START", and "STOP" buttons
are enabled.
8 Protection
Color: green
Engine monitoring
If the "Monitoring" LED is illuminated, the engine delayed protective moni-
toring (protective functions configured to be ignored during start up) is ac-
tively monitored by the control. Generator underspeed, underfrequency, un-
dervoltage and reverse power are also monitored. The protective monitoring
(i.e. overcurrent) that cannot be delayed by engine speed will always be
monitored.
9 Alarm
Color: red
Alarm
If the "Alarm" LED illuminates, the control has detected a fault condition.
The control will respond according to the assigned alarm class of the fault.
If the "RESET" button is pressed and released, the alarm is acknowledged,
the centralized alarm (horn) is discontinued, and the "Alarm" LED becomes
continuously illuminated. An alarm message is shown in the LC display as
well.
Table 4-4 lists all standard alarm messages for this control.
10 GCB on
Color: green
Reply: GCB is closed
The GCB is closed when the "GCB ON" LED is illuminated.
11 [GCP-32] MCB on
[GCP-31] Mains parallel
Color: green
Reply: MCB is closed / Mains parallel
[GCP-32] Units that control two power circuit breakers: The MCB is closed
when the "MCB ON" LED is illuminated.
[GCP-31] Units that control only one circuit breaker may be used with sys-
tem breaker control units (LS 4). These breaker control units
use the load sharing CAN bus to communicate the status of
circuit breakers and disconnectors to the GCP-31. When the
MCB is closed, the LS 4 transmits this status and The "Mains
parallel" LED is illuminated when the MCB and the GCB are
closed simultaneously.

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 13/39
Buttons
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
In order to facilitate configuring the control parameters, the buttons are equipped with a "AUTOROLL" function.
This permits the user to rapidly advance the display to the next setting, configuration screen, digit, or cursor posi-
tion. The "AUTOROLL" function is only enabled when the user presses and holds the corresponding button.
General / Configuration
12 Message↓/ Select
Color: blue
Message↓/ Select
Normal operation: Message↓- By pressing this button, the user will ad-
vance to the next display screen of measured values and alarm messages.
Configuration: Select - By pressing this button, the user will advance to the
next configuration screen. If the original displayed value has been
changed by pressing either the "Digit↑" or "Cursor→" buttons, the new
value is saved by pressing the "Select" button once. Pressing this button
again will advance the display to the next configuration screen.
13 Display V↓/ Digit↑
Color: blue
Display V↓/ Digit↑
Normal operation: Display V↓- By pressing this button, the user will ad-
vance to the next generator and mains voltage display screen.
Note: Pressing and holding this button for at least 5 seconds while a
counter (kWh, start, running hours) is being displayed will result in that
counter being reset.
Configuration: Digit↑- By pressing this button, the user will increase the
number over the cursor by one digit. The numbers in the display may
only be increased to the maximum permissible limit (refer to the list of
parameters located in the Appendix of manual 37365). If a number has
been increased to the maximum permissible limit, the number automati-
cally reverts to the lowest permissible limit.
14 Setpoint / Cursor →
Color: blue
Setpoint / Cursor →
Normal operation Setpoint - By pressing this button, the user will be able
to display individual set point values. The displayed set point values may
be adjusted by pressing the "Setpoint↑" or "Setpoint↓" buttons. Certain
set point values, which are entered into the unit from external sources,
can only be viewed. The set points that may be viewed in each code
level can be found in Appendix A on page 38.
Configuration Cursor→- By pressing this button, the user will move the
cursor one position to the right. The cursor automatically returns to the
extreme left position when the "Cursor→" button is pressed while the
cursor is in the extreme right position.
15
16 Setpoint↑/ Setpoint↓
Color: blue
Setpoint↑/ Setpoint↓
By pressing the "Setpoint↑" or "Setpoint↓" buttons, the displayed set point
will be changed accordingly. Only values that have been enabled during
configuration and are accessible in the current operating mode may be
changed. If the set point raise and lower buttons are pressed and held simul-
taneously, the lamp test function is activated.

Manual 37238D GCP-30 Series - Genset Control
Page 14/39 © Woodward
Circuit Breaker Operation
17
18 GCB ON / GCB OFF
Color: green/red
Close GCG / open GCB
Note: These buttons function only if either the MANUAL or TEST operat-
ing mode has been enabled.
GCB ON......This function is dependent upon the configured breaker logic.
Pressing the "GCB ON" button will result in the mains circuit
breaker closing. The breaker closure process will be aborted if
the either "GCB OFF" or "MCB ON" button is pressed or the
operating mode is changed.
GCB OFF....This function is dependent upon the configured breaker logic.
Pressing the "GCB OFF" button will result in the generator
circuit breaker opening. The breaker synchronization and
closing process can be aborted by pressing this button as well.
19
20 [GCP-32] MCB ON / MCB OFF
Color: green/red
Close MCB / open MCB (only available in [GCP-32])
Note: These buttons function only if either the MANUAL or TEST operat-
ing mode has been enabled.
MCB ON......This function is dependent upon the configured breaker logic.
Pressing the "MCB ON" button will result in the mains circuit
breaker closing. The breaker closure process will be aborted if
the either "MCB OFF" or "GCB ON" button is pressed or the
operating mode is changed.
MCB OFF....This function is dependent upon the configured breaker logic.
Pressing the "MCB OFF" button will result in the mains cir-
cuit breaker opening. The breaker synchronization and closing
process can be aborted by pressing this button as well.

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 15/39
Operating Mode Selection
21 AUTO
Color: blue
AUTOMATIC operating mode
The engine is automatically started/stopped and the circuit breakers are
automatically actuated. The control inputs "Automatic 1" and "Automatic 2"
are used to control the generator output to a configured level while in the
"AUTOMATIC" operating mode (refer to the description of the discrete in-
puts in the configuration manual). The control monitors for conditions re-
quiring an emergency power and/or sprinkler operation to be initiated re-
gardless of the status of the "Automatic 1" and "Automatic 2"discrete inputs.
Discrete input "Automatic 1" energized:
The generator is loaded with real power to the level configured for set
point 1.
Discrete input "Automatic 2" energized:
The generator is loaded with real power to the level configured for set
point 2 or to the level that corresponds to the external set point via the ana-
log input (0/4 to 20 mA, 0 to 5/10 Vdc) or interface.
NOTE
Energizing discrete input 2 (terminal 63) will prohibit the operating mode from being changed from the
mode currently enabled.
22 MAN
Color: blue
MANUAL operating mode
The "MANUAL" operating mode enables the buttons on the control to be
used for manual operations of the unit. The automatic operation functional-
ity of the generator and the breakers is disabled. The protective functions
(i.e. low oil pressure, underfrequency, overvoltage, etc.) of the control re-
main enabled. The control does not monitor for conditions requiring an
emergency power and sprinkler operation to be initiated. If an emergency
power and sprinkler operation was initiated prior to changing the operation
mode to "MANUAL", the emergency power or sprinkler operation will con-
tinue.
23
24 START / STOP
Color: green/red
Engine start/stop
START........ Pushing this button while the control is in the MANUAL op-
eration mode will start the engine. The starter and fuel sole-
noid/gas valve are enabled when the START button is
pressed. The fuel solenoid/gas valve remains energized and
the starter disengages after the engine reaches the configured
firing speed.
STOP........... Pressing this button stops the engine by de-energizing the fuel
solenoid/gas valve relay output.

Manual 37238D GCP-30 Series - Genset Control
Page 16/39 © Woodward
25 TEST
Color: blue
TEST operating mode
Pressing the "TEST" button will start the engine and enable engine protec-
tive functions. The circuit breakers may be operated manually to conduct
load tests. If a mains failure occurs while in the TEST mode, the controller
will initiate an emergency and/or sprinkler operation depending on how the
control is configured.
Initiate a load test After the "TEST" mode has been enabled, a load test
may be initiated by pressing the "GCB ON" button. The GCB
will synchronize or the MCB will open in accordance with
how the circuit breaker logic is configured. Once the genera-
tor is synchronized or the bus is dead, the GCB will close. The
generator load can be increased or decreased by changing the
load reference point with the "SETPOINT" buttons.
Terminate a load test The load test will be terminated immediately when
the "GCB OFF" or "MCB ON" button is pressed (depending
upon the configured circuit breaker logic). A power reduction
will not be performed when the load test is terminated in this
manner. The generator will perform a power reduction if the
"STOP" or "AUTOMATIC" mode buttons are pressed and the
controller is not receiving a run request signal.
26 STOP
Color: blue
STOP operating mode
Pressing the "STOP" button will shut the generator down. The following se-
quence is performed when the STOP mode is enabled:
Stopping process:
•The "STOP" button is pressed once
•The generator load is reduced
•The GCB is opened once the measured load reaches 5 % of the rated gen-
erator real power
•A cool down period is carried out according to the configured engine cool
down
Shutdown process:
•The "STOP" button is pressed twice
•The GCB is opened immediately without performing a power reduction
•The generator shuts down immediately without performing a cool down
If discrete input 6 (terminal 63) is energized and configured as a control input by setting parameter "Op.mode
blocked by Ter.63" as YES, it is possible for XPD and XPQ Package units with version 4.3010 software or
higher to select the operation mode via an external source. Energizing and/or de-energizing terminals 127 and
128 in accordance with Table 2-2 will change the operating mode of the unit. It is assumed that the controller has
supply power applied.

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 17/39
Operation
mode blocked
(terminal 63)
Input
STOP
(terminal 127)
Input
AUTOMATIC
(terminal 128)
Function
de-energized nonfunctional nonfunctional The operation mode selection buttons at the front of the GCP are en-
abled and are used to change the operational mode (terminals 127/128
have no effect).
energized de-energized de-energized The controller is locked into the operation mode that the unit is in at
the moment terminal 63 is energized. The operation mode selection
buttons at the front of the GCP are disabled and cannot be used to
change the operational mode.
energized energized de-energized The STOP operation mode is activated. The operation mode selection
buttons at the front of the GCP are disabled and cannot be used to
change the operational mode.
energized de-energized energized The AUTOMATIC operation mode is activated. The operation mode
selection buttons at the front of the GCP are disabled and cannot be
used to change the operational mode.
energized energized energized The STOP operation mode is activated. The operation mode selection
buttons at the front of the GCP are disabled and cannot be used to
change the operational mode.
Table 2-2: Function – external operation mode selection
WARNING
Acknowledging an alarm, which has shut the engine down, while the control is still enabled (i.e. a run
signal is still enabled) before to discovering the cause of the fault condition may result in an uninten-
tional restart of the engine. Prior to acknowledging the alarm, verify the fault condition has cleared in
order to protect against injury of personnel in the vicinity and damage or destruction effected equip-
ment.
⇒If the cause of the alarm is unknown or unclear, NEVER press the RESET button! The result may be
destruction of the engine or equipment!
27 RESET
Color: blue
Acknowledgement
Pressing this button acknowledges alarm messages. The alarm text in the
display is cleared and the "Alarm" LED is turned off. The control display is
returned to the basic operating screen. F2 and F3 class alarms may only be
acknowledged in either the "STOP" or "MANUAL" operating modes.

Manual 37238D GCP-30 Series - Genset Control
Page 18/39 © Woodward
LC Display
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28 LC-Display Liquid Crystal Display
The LC display shows messages and measured values, depending on the
mode or function currently enabled. In the configuration mode, individual
parameters are displayed and may be changed. In the AUTOMATIC mode
the measured operating values (e.g. voltage and current values) may be dis-
played.

Manual 37238D GCP-30 Series - Genset Control
© Woodward Page 19/39
Chapter 3.
Display
Measured Values
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Top Display Line
NOTE
By using the "Display V" button will display the different measured voltages.
xxxx yyy yyy yyy
----------------
Display in automatic mode, top line: measured values
The following measured values are displayed (LEDs V1/V2/V3 indicate the meas-
ured conductor(s)):
•"xxxx" - generator voltage depending of the LEDs V1/V2/V3:
V1 illuminates line-to-neutral voltage VL1-N
V2 illuminates line-to-neutral voltage VL2-N
V3 illuminates line-to-neutral voltage VL3-N
V1+V2 illum. line-to-line voltage VL1-L2
V2+V3 illum. line-to-line voltage VL2-L3
V3+V1 illum. line-to-line voltage VL3-L1
•"yyy" - generator currents (line currents IL1, IL2 and IL3).

Manual 37238D GCP-30 Series - Genset Control
Page 20/39 © Woodward
Bottom Display Line
NOTE
Pressing the "Message↓" button will advance the bottom line of the display. Pressing the "Message↓"
button will also advance through any alarm text that may be present.
The following screens may be viewed in succession by pressing the "Message↓" button. When the last display
screen has been reached, the display returns to the basic screen. If alarms have occurred, the message texts are
displayed in the sequence of occurrence in the display screens before the basic screen. If control functions are ac-
tive (i.e. synchronization of the GCB), the basic screen is superimposed with the corresponding message (i.e. "
synchronization"). Following the termination of the control function, the basic screen is displayed again.
----------------
xxxxxxxxxxxxxxxx
Display in automatic mode, bottom line: measured values
Instead of "xxxxxxxxxx" the following measuring values are displayed:
•The maximum generator current (slave pointer)
•The first four alarm messages that occurred
•The time and date (XPD and XPQ Packages only)
•The energy counter (kWh)
Succession Display Description
0(basic screen) --- --- --- ---
Gen 0.00 0000kW Generator power factor
Generator actual real power
1 --- --- --- ---
max. Gen.current Slave pointer (maximum generator current [the measured values are
displayed above the text])
2 --- --- --- ---
Time Date and time (XPD and XPQ Packages only)
3(MPU = ON) --- --- --- ---
Gen. 0000 rpm Engine speed (Pickup input is configured YES)
4.1
(alternative to
4.2/4.3)
--- --- --- ---
Ma E0000kW Mains measured real power (measured via analog input; E = Export,
I = Import)
4.2
(alternative to
4.1/4.3)
--- --- --- ---
Ma 0.00 E0000kW Mains power factor
Mains measured real power (calculated; E = Export, I = Import)
4.3
(alternative to
4.1/4.2)
--- --- --- ---
Ma LS4: 00000kW Mains measured real power (measured by LS 4; GCP-31/XPD and
XPQ Packages only)
5 --- --- --- ---
Mainscurr.0000 A Mains measured current L1
6.1
(alternative to 6.2) --- --- --- ---
Mainsvolt.0000 V Mains measured voltage (pressing the "Display V↓" button will
change the mains phase displayed)
6.2
(alternative to 6.1) --- --- --- ---
M-decoupl:0000 V Mains voltage after the mains decoupling (measured by LS 4; GCP-
31/XPD and XPQ Packages only)