Woodward easYgen-3000 User manual

easYgen-3000 Series
Option Manual K51 Genset Control
EG3500XTP1/P2 for Operation with Group Controller GC (Option K51)
Software Version 1.15-1
37900A

© 2019
This manual is no translation but the original Technical Manual.
Woodward GmbH
Handwerkstrasse 29
70565 Stuttgart
Germany
Telephone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: http://www.woodward.com
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control2

Table of contents
1 General information..................................................................................................................... 4
1.1 About This Manual...................................................................................................................... 4
1.1.1 Depiction Of Notes And Instructions........................................................................................... 4
2 Introduction.................................................................................................................................. 7
2.1 Overview..................................................................................................................................... 7
2.2 Description.................................................................................................................................. 7
3 Additional Functionality .............................................................................................................. 8
3.1 Operation with the Group Controller............................................................................................ 8
3.2 Application................................................................................................................................... 8
3.2.1 Inhibit uncoordinated dead bus closure GCB.............................................................................. 8
3.2.2 Droop configuration..................................................................................................................... 9
3.2.3 Home Screen............................................................................................................................ 10
3.3 Communication Management / Diagnostics.............................................................................. 10
3.4 Group Controller alarms ........................................................................................................... 14
3.5 Parameter overview.................................................................................................................. 15
3.6 Logical Command Variables (CV)............................................................................................. 16
4 Index.......................................................................................................................................... 19
Table of contents
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 3

1 General information
1.1 About This Manual
1.1.1 Depiction Of Notes And Instructions
Safety instructions are marked with symbols in these instructions.
The safety instructions are always introduced by signal words that
express the extent of the danger.
DANGER!
This combination of symbol and signal word indi‐
cates an immediately-dangerous situation that
could cause death or severe injuries if not avoided.
WARNING!
This combination of symbol and signal word indi‐
cates a possibly-dangerous situation that could
cause death or severe injuries if it is not avoided.
CAUTION!
This combination of symbol and signal word indi‐
cates a possibly-dangerous situation that could
cause slight injuries if it is not avoided.
NOTICE!
This combination of symbol and signal word indi‐
cates a possibly-dangerous situation that could
cause property and environmental damage if it is
not avoided.
This symbol indicates useful tips and recommen‐
dations as well as information for efficient and
trouble-free operation.
Woodward reserves the right to update any portion of this publica‐
tion at any time. Information provided by Woodward is believed to
be correct and reliable. However, Woodward assumes no respon‐
sibility unless otherwise expressly undertaken.
© Woodward
All Rights Reserved.
Safety instructions
Tips and recommendations
General information
About This Manual > Depiction Of Notes And Ins...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control4

WARNING!
Read this entire manual and all other publications
pertaining to the work to be performed before
installing, operating, or servicing this equipment.
Practice all plant and safety instructions and pre‐
cautions. 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 (overtem‐
perature, or overpressure, where applicable) shut‐
down 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 governor(s) or electric control(s), the
actuator(s), fuel control(s), the driving mecha‐
nism(s), the linkage(s), or the controlled device(s)
fail.
Any unauthorized modifications to or use of this
equipment outside its specified mechanical, elec‐
trical, or other operating limits may cause personal
injury and/or property damage, including damage
to the equipment. Any such unauthorized modifica‐
tions: (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 certifi‐
cations 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 dis‐
connecting the battery from the system.
Electronic controls contain static-sensitive parts.
Observe the following precautions to prevent
damage to these parts.
– Discharge body static before handling the con‐
trol (with power to the control turned off, con‐
tact 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.
General information
About This Manual > Depiction Of Notes And Ins...
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 5

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.
General information
About This Manual > Depiction Of Notes And Ins...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control6

2 Introduction
This brief manual must be used together with the
standard manuals
The following standard manuals are required to
install, commission, and operate the
easYgen-3500XT Packages P1, P2 with Option
K51 and the Group Controller:
– easYgen-3000XT Series Manual (No. 37580
and 37581)
– GC3000XT Group Controller (No. 37689)
The following functions described in the
easYgen-3000XT Series Manual are not supported
by K51:
– Localization tool
– LDSS without GC
– J1939 ADEC ECU9: rapid start, droop selec‐
tion
– J1939 SPNs: 3251, 3699, 3702
– AVR control
2.1 Overview
The easYgen-3500XT Packages P1, P2 with Option K51 are dedi‐
cated devices for the interaction with the Group Controller
GC3400XT (GC).
2.2 Description
Only the easYgenXT K51 works together with the Generator Group
Controller GC3400XT.
For detailed description of the Group Controller (GC) functionality,
please refer to the Group Controller manual.
The K51 easYgen derivate has included special functions to be
able to operate with the Group Controller GC3400XT-P1. The K51
device provides some special parameters which are needed to
work with the GC device. These parameters are by default
adjusted so that the usual GC functions are provided, but can be
configured so that the K51 device can work as a standard
easYgen, with the exception of the LDSS feature.
Introduction
Description
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 7

3 Additional Functionality
3.1 Operation with the Group Controller
To run the K51 easYgen together with the Group Controller, the
parameter “GC mode” (7950 Ä p. 15) must be configured to “On”
(which is the default option).
If the GC mode is enabled:
nParameter “Application mode” (3444) is fixed to “GCB/LS5.”
This is because some functions of the Group Controller bear
resemblance to Woodward's LS5 device. (For this reason, in
some screens "LS5" will appear, even though there is no LS5.)
nParameter "Load share interface” (9924 Ä p. 16) is hidden,
therefore, parameter "Load share interface GC mode" (9948)
becomes active and defines the communication interfaces
between the easYgens and their Group Controller. This load-
share interface to the GC is selectable as CAN3, Ethernet A or
redundant CAN3/Ethernet A.
nThe K51 easYgens share data for load sharing, “LS5”, diag‐
nostic and “Load dependent start/stop” (LDSS) with the Group
Controller.
nThe range of the parameter “Device number” (1702) is
restricted to 1-31. The Group Controller is fixed on device
number 32.
nIf the Group Controller works with a generator group circuit
breaker (GGB), the GGB status can be indicated in the “One
Line Diagram” of the K51 easYgen if parameter “GC Online
diagram with GGB” (4147 Ä p. 16) is configured to “On”
3.2 Application
3.2.1 Inhibit uncoordinated dead bus closure GCB
WARNING!
To avoid uncoordinated GCB dead bus closure
there are some fixed internal precautions (like in
the standard easYgen) and some precautions
which must be taken by configuring the LogicsMa‐
nager's "Inhibit dead bus closure GCB”. Logi‐
csManager is preconfigured by default as
described below.
Consider the following precautions:
nThe easYgens which do not recognize their Group Controller
must inhibit their GCB dead busbar closure. For this reason "
02.40 Ä p. 16 GC not recognized" is assigned to the Logi‐
csManager "Inhibit dead bus closure GCB” (15161 Ä p. 9)
nThe easYgens which recognize a dead generator busbar (Gen‐
erator Group is dead), with all the breakers acting on this
busbar being open, negotiate the dead busbar closure with all
generator group members (the easYgen with the smallest
device number has the highest priority). Where the GC wants
to effect the dead bus closure, too, it must inhibit all the easY‐
gens from closing their breakers. For this reason the Group
Controller is transmitting the command variable “02.41 GC
Inhibit DBCL GCB”, which is assigned to the LogicsManager
"Inhibit dead bus closure GCB” (15161 Ä p. 9).
Basic configuration
Additional Functionality
Application > Inhibit uncoordinated dead...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control8

nThe K51 easYgenXT (GC mode enabled) which has triggered
the "Missing easYgen alarm" delays its dead bus closure
depending on its device number. This is cascaded through:
(Device number easYgen) x 0.5s. The GC dead bus closure is
not delayed, if the "Missing easYgen alarm" is triggered. This
procedure cannot prevent a wrong dead busbar closure, but it
minimizes the probability of this happening.
nThe easYgen which recognizes at least one easYgen with a
closed GCB in its group, inhibits the GCB dead bus bar clo‐
sure.
ID Parameter CL Setting range
[Default]
Description
15161 Inh.dead bus
GCB
2 Determined by
LogicsManager
[(02.40 OR
02.41) & 1]
If this LM is active, the dead bus closure of the GCB is inhibited, if one of the
conditions is true:
n02.40 Ä p. 16 Own Group Controller not recognized
OR
n02.41 Ä p. 16 GC Inhibit dead bus closure GCB
3.2.2 Droop configuration
To avoid instable behavior of the voltage and frequency control if a
load sharing member is missing, the configuration of the K51 must
be adapted. In the K51, the LogicsManager's “12904 Ä p. 9
Freq. droop act.” and “12905 Ä p. 9 Volt. droop act.” are
changed (by default) in comparison to the standard easYgen
device:
ID Parameter CL Setting range
[Default]
Description
12904 Freq. droop act. 2 Determined by
LogicsManager
[(08.17 OR
08.06) OR
02.44]
If this LM is active, frequency droop becomes active, if one of the conditions
is true:
n08.17 Missing members (like standard)
OR
n08.06 GCB fail to open (like standard)
OR
n02.44 GC Droop request
12905 Volt. droop act. 2 Determined by
LogicsManager
[(08.17 OR
08.06) OR
02.44]
If this LM is active, voltage droop becomes active, if one of the conditions is
true:
n08.17 Missing members (like standard)
OR
n08.06 GCB fail to open (like standard)
OR
n02.44 GC Droop request
Additional Functionality
Application > Droop configuration
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 9

3.2.3 Home Screen
If GC mode is on, it is possible to show the mains data measured
by the Group Controller “Mains (GC)” like in the screen below. If
this is wished, parameter “4103 Home screen data” must be con‐
figured to “Generator/LS5” .
Additionally, the state of the GGB controlled by the Group Con‐
troller can be shown if parameter “4147 Ä p. 16 GC One line dia‐
gram with GGB” is configured to “On”.
Fig. 1: HMI Home Screen GC mode on
3.3 Communication Management / Diagnostics
Like in the standard easYgen, there is the function of Communica‐
tion Management. (For details refer to easYgen manual chapter on
Communication Management). Option K51 provides different
screens for the easYgen and the Group Controller diagnostics.
In the Group Controller mode, the load share interfaces can be
CAN, Ethernet A or redundant CAN/Ethernet A. For this reason,
there are additional indications “CAN” and “A” (in Toolkit “Only NW
CAN”, “Only NW A”). “Monitored easYgen” indicates the number of
easYgens which are taught in. Even if the Group Controller is a
member of the load share (device 32), it is not added to “Monitored
easYgen”. (The screens are located under “Status Menu / Next
page / Multi-unit Diagnostic devices” 1st and 2nd screen.)
easYgen load share diagnostic screen
(System update easYgen)
Additional Functionality
Communication Management / D...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control10

The following HMI screen shows two easYgen devices taught in:
the load share interface is configured as “CAN/Ethernet A”.
Device 1 is OK, device 3 is only available on CAN (this means:
Ethernet A failure).
In the corresponding Toolkit screen the Group Controller (device
32) is visible, too:
Example 1
Additional Functionality
Communication Management / D...
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 11

This screen shows the Group Controller (device 32) as redundant
taught in, but only Ethernet A is intact.
Example 2
Additional Functionality
Communication Management / D...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control12

This screen shows the Group Controller (device 32) as taught in,
but it is not recognized anymore. For this reason, command vari‐
able “02.40 Ä p. 16 Own GC not recognized” becomes active.
“02.40 Ä p. 16 Own GC not recognized” is assigned (by default)
to the LogicsManager "Inhibit dead bus closure GCB”; therefore,
“Inh. Dead bus closure” is indicated, too. (Missing easYgen is
indicated because in this indication the Group Controller is han‐
dled like an easYgen.)
Example 3
Similar to the easYgen, Communication Management is imple‐
mented for the Group Controller, too.
The screen is located under “Status Menu / Next page / Multi-unit
Diagnostic devices” 3rd screen.
Via the soft key “GC upd.” it is possible to start a system update of
the Group Controllers. The following screen shows GC 1 and GC 3
as taught in.
“Monitored GC” indicates the number of Group Controllers, which
are taught in. GC 1 is OK, GC 3 is not OK e.g. GC 3 is missing an
easYgen.
In redundant operation (Ethernet B/C) with one faulty interface, the
intact interface “B” or “C” will be indicated.
If there is no Group Controller recognized by the easYgen, the fol‐
lowing screen will be displayed:
Group Controller diagnostic screen
(System update Group Controller)
Additional Functionality
Communication Management / D...
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 13

3.4 Group Controller alarms
The alarms of the Group Controller are available in the easYgen as
command variables. (Refer to
Ä Chapter 3.6 “Logical Command
Variables (CV)” on page 16 )
These command variables can be assigned to the “Free Alarms”.
(Refer to
Ä “Alarm “Interface redundancy error”” on page 15 .)
If there is at least one alarm latched in the GC, the easYgen trig‐
gers “22.33 Ä p. 18 GC common alarm” with alarm class A.
It is possible to acknowledge non-active GC alarms of the own
group via the easYgen:
nby the LogicsManager "86.15 Ext. acknowledge" or
nspecific, by selecting the alarm "GC common alarm" on the
active alarm list and pressing the acknowledge button.
Handling of Group Controller alarms
in the easYgen
Additional Functionality
Group Controller alarms
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control14

If the application needs an alarm, where the redundancy of the
load share interface is lost, “Free Alarms” may be used. Like the
standard easYgen device, the K51 provides 16 free alarms. They
can be used to drive additional alarms from the LM command var‐
iables. The alarm shall be triggered if CAN or Ethernet A is at
fault.
For "Free Alarm 1" (parameter 8120), the description of the alarm
is defined by parameter 6680 , e.g. “GC CAN1/EthA redund.”
(max. 20 characters).
Parameter 8120 defines the trigger conditions: The alarm shall be
triggered if “08.51 Ä p. 17 CAN fault” or “08.52 Ä p. 17
Ethernet A fault” becomes active.
Parameter 8122 “Self-acknowledge” is configured to “No”, to
catch loose contacts too.
Alarm “Interface redundancy error”
3.5 Parameter overview
The following parameters have been added and reflect the basic
configuration for operation with the Group Controller:
ID Parameter CL Setting
range
[Default]
Description Location
7950 GC mode 2 [On] The GC mode is disabled. The
easYgen device behaves like a
standard easYgen3500XT
Note: If this parameter is
on, parameter “Applica‐
tion mode” (3444) is
fixed to “GCB/LS5
Parameter Configura‐
tion Configure appli‐
cation Configure
breakers General
breakers settings
Off
Additional Functionality
Parameter overview
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 15

ID Parameter CL Setting
range
[Default]
Description Location
The GC mode is enabled. The
easYgen expects to see a GC device
on CAN3 / Ethernet A interface.
9924 Load share
Interface GC
mode
2 CAN The communication interface
between the different easYgens and
between the easYgens and the corre‐
sponding Group Controller is only
CAN3
Note: This parameter is
only visible if parameter
“GC mode”
(7950 Ä p. 15) is config‐
ured to “On”. Otherwise
(for standard EG3500XT
operation), the interfaces
are determined by
parameter "Load share
interface" (9924 Ä p. 16)
which is hidden in GC
mode. If any CAN com‐
munication is configured
CAN3 of the easYgens
are connected to CAN 1
of the corresponding
Group Controller.
Parameter Configura‐
tion Configure appli‐
cation Configure con‐
troller Configure load
share
Ethernet
A
Communication port is only Ethernet
A
[CAN/
Ethernet
A]
A redundant communication interface
chosen
4147 GC Online
diagram with
GGB
2 On The state of the GGB (handled by the Group Controller is indi‐
cated in the “One line diagram”)
Parameter Configure
HMI Screen configu‐
ration
[Off] The state of the GGB (handled by the Group Controller is not
indicated in the “One line diagram”)
13349 GC upd. 2 Yes The easYgen forces the Group Controllers to execute a System
Update.
Status Menu Multi-
unit Diagnostic group
controllers
[No] The parameter is reset to “No” automatically after the system
update is done.
Note: The remaining time for the system update is shown in this
screen, too.
3.6 Logical Command Variables (CV)
The K51 option supports GC-related logical command variables.
See below for details.
No. ID Name Function Note
02.40 10846 Own GC not
recognized
The Own GC is not recognized TRUE as long as no GC is recognized by CAN and
Ethernet A from the easYgen. This command variable
is assigned to LM “Inhibit dead bus GCB”
(15161 Ä p. 9) by default.
02.41 10849 GC Inhibit DBCL
GCB
Inhibit dead bus closure GCB TRUE if the GC wants to do a dead bus closure. (This
CV is generated by the GC and transmitted via load
share interface to the easYgens.) This command var‐
iable is assigned to LM “Inhibit dead bus GCB”
(15161 Ä p. 9) by default
02.42 10950 GC Neighbor
GC miss.
GC Neighbor GC is missing TRUE if the GC is missing another GC
02.43 10952 GC any EG is
missing
GC any EG is missing TRUE if GCs have detected that at least one easYgen
is missing in at least one group in the own segment
02.44 10951 GC Droop
request
GC Droop request TRUE if 02.42 OR 02.43 is TRUE. This command var‐
iable is assigned to LM, “Freq. droop act.”
(12904 Ä p. 9) and “Volt. droop act.” (12905 Ä p. 9)
by default
Group 02: Application conditions:
Additional Functionality
Logical Command Variables (C...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control16

No. ID Name Function Note
04.71 10847 GC LDSS Start
request
The load dependent start/stop
(LDSS) function of the GC requests
an engine start.
TRUE as long as the load dependent start/stop func‐
tion of the GC requests an engine start.
In LDSS operation, this CV can be assigned to LM
“Start req. in AUTO” (12120).
No. ID Name Function Note
08.51 11815 CAN fails CAN fails TRUE as long as the easYgen does not recognize any
other taught in device on CAN 3. It becomes only
active in redundant mode (CAN/Ethernet A).
08.52 11816 Ethernet A fails Ethernet A fails TRUE as long as the easYgen does not recognize any
other taught in device on Ethernet A. It becomes only
active in redundant mode (CAN/Ethernet A).
(These command variables are generated by the GC and passed
to the easYgen via the load share interface. They are not in the
alarm system and not in the diagnostic screen, but they could be
used in LogicsManagers e.g. to generate Free Alarms)
No. ID Name Function Note
22.01 - GC NW CAN 1
error
GC Network CAN 1 error TRUE if no other taught in easYgen on CAN 1 is rec‐
ognized.
TRUE if the GC sees no taught in easYgen at all on
CAN 1 is recognized.
Redundant Ethernet A connection necessary to get
information.
22.02 - GC NW EthA
error
GC Network Ethernet A TRUE if no other taught in easYgen on Ethernet A is
recognized.
TRUE if the GC sees no taught in easYgen at all on
Ethernet A is recognized.
Redundant CAN 1 connection necessary to get infor‐
mation!
22.03 - GC NW EthB
error
GC Network Ethernet B TRUE if no other taught in GC on Ethernet B is recog‐
nized.
22.04 - GC NW EthC
error
GC Network Ethernet C TRUE if no other taught in GC on Ethernet C is recog‐
nized.
22.05 - GC CAN1 EthA
redund.
GC CAN1 Ethernet A redundancy TRUE if there is no easYgen recognized either at
CAN1 or Ethernet A . (Only in redundant mode.)
22.06 - GC EthB EthC
redund.
GC Ethernet B Ethernet C redun‐
dancy
TRUE if there is no GC recognized either at Ethernet
B or Ethernet C. (Only in redundant mode.)
22.07 - GC Syst. upd.
easYgen
GC System update easYgen TRUE if a system update easYgen is required or
active.
22.08 - GC System
update GC
GC System update GC TRUE if a system update GC is required or active.
22.09 - GC Missing
easYgen
GC Missing member easYgen TRUE if a taught in easYgen is missing
22.10 - GC Missing GC GC Missing member Group Con‐
troller
TRUE if a taught in GC is missing
22.11 - GC Group not
ok
GC Group not ok TRUE if at least one of these failures becomes active:
GC easYgen diagnostic (System update easygen),
GC easYgen Missing OR GC CAN1 EthA redund.
Group 04: Application conditions:
Group 08: System related alarms
Group 22: GC Alarms
Additional Functionality
Logical Command Variables (C...
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 17

No. ID Name Function Note
22.12-22
.16
- Reserved
22.17 - GC GGB fail to
close
GC GGB fail to close TRUE if the GC has attempted to close the GGB for
the configured maximum number of attempts and
failed.
22.18 - GC GGB fail to
open
GC Failure GGB open TRUE if the GC is still receiving the reply "GGB
closed" after the GGB open monitoring timer has
expired.
22.19 - GC
Gen.gr.ph.rot.mi
sm
GC Generator Group phase rota‐
tion mismatch
TRUE if the measured phase rotation of the generator
group does not match the configured one.
22.20 - GC Mains
ph.rot.mism.
GC Mains phase rotation mismatch TRUE if the measured phase rotation of the mains
does not match the configured one.
22.21 - GC Ph.rot. mis‐
match
GC Phase rotation mismatch TRUE if different phase rotation of mains and the gen‐
erator group is detected.
22.22 - GC GGB feed‐
back check
GC GGB feedback check TRUE if the GGB reply indicates a closed GGB, but
the phase angle between the load busbar and the
Generator Group is outside the 12° -window.
22.23 - GC Gen. AC
wiring
GC Generator AC wiring TRUE if one or more of the generator voltages are
wrongly wired (detected by the plausibility checking of
frequencies).
22.24 - GC Busbar 1
AC wiring
GC Busbar 1 AC wiring TRUE if one or more of the bus bar voltages are
wrongly wired (detected by the plausibility checking of
frequencies).
22.25 - GC Mains AC
wiring
GC Mains AC wiring TRUE if one or more of the mains voltages are
wrongly wired (detected by the plausibility checking of
frequencies).
22.26 - GC MCB fail to
close
GC MCB fail to close TRUE if the GC has attempted to close the MCB for
the configured maximum number of attempts and
failed.
22.27 - GC MCB fail to
open
GC MCB fail to open TRUE if the GC is still receiving the reply "MCB
closed" after the MCB open monitoring timer has
expired.
22.28 - GC Wb:Analog
input 1
GC Analog input 1 wire break TRUE if there is a wire break according to the AI 1
configuration detected.
22.29 - GC Wb:Analog
input 2
GC Analog input 2 wire break TRUE if there is a wire break according to the AI 2
configuration detected.
22.30 GC Paramet.
alignment
GC Parameter alignment TRUE if GCs have different LDSS settings
22.31 Reserved
22.32 Reserved
22.33 GC common
alarm Active as long as there is any latched alarm in the GC.
Note: Please notice the following command variables are assigned
to the mains measurement of the easYgen, not of the Group Con‐
troller, even if parameter “7950 GC mode” is configured to "on":
02.09 Mains voltage ok
02.10 Mains frequency ok
02.11 Mains volt./freq. ok
02.14 Mains rotation CCW
02.15 Mains rotation CW
Additional Functionality
Logical Command Variables (C...
37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control18

4 Index
A
Alarms .................................14
C
Communication between devices ............ 10
D
Dead busbar closure ....................... 8
Droop .................................. 9
G
Group Controller .......................... 8
S
Symbols
in the instructions ....................... 4
Index
37900A EG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control 19

37900AEG3500XTP1/P2 for Operation with Group Controller GC (Option K51) | K51 Genset Control20