Viessmann VITOBLOC 200 Parts list manual

5780078 GB 04/2019 Please keep for later reference.
Technical Description
CHP switching cabinet
VITOBLOC 200
Block-type thermal power plant –electricity and heat
from natural gas and biogas
Very efficient due to cogeneration
Total efficiency 96%
Primary energy savings to 30,74%
VITOBLOC 200
Block-type thermal power plant for
natural gas operation
pursuant to the requirements of the EU Gas
Equipment Directive and EU Machine
Directive
model EM-50/81
model EM-70/115
model EM-100/173
model EM-140/207
model EM-199/263
model EM-238/363
model EM-260/390
model EM-401/549
model EM-530/660

Legal notice
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This equipment satisfies the basic
requirements of the appropriate standards
and directives. Its conformity has been
demonstrated. These documents and the
original conformity declaration are stored
on the premises of the manufacturer.
NOTE
The Vitobloc 200 cogeneration module is
not suited to 60 Hz operation which means
that it is in particular not available to the
American and Canadian market.
Important general instructions for application
Only use this technical equipment as intended and
complying with the assembly instructions, operating
instructions and service instructions. Only authorised
professionals should service and repair it.
Only operate this technical equipment in the
combinations and with the accessories and
replacement parts referred to in the assembly
instructions, operating instructions and service
instructions. Only use other combinations,
accessories and wear parts if they are explicitly
intended for the specific application and do not impair
the performance features or safety requirements.
Subject to change without notice.
This is a component of the original operating
instructions.
Figures, steps in certain functions and technical data
may differ slightly due to constant advancements.

Table of Contents
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1Switching cabinet.............................................................................4
1.1 Utilisation ......................................................................................................................4
1.2 Equipment and Dimensions......................................................................................... 4
1.3 Displays and measurements........................................................................................ 5
1.4 Operating equipment....................................................................................................6
1.5 Power circuit .................................................................................................................6
1.6 Control component....................................................................................................... 7
1.7 Auxiliary drive component........................................................................................... 8
2Control system (BMS 2007).............................................................9
2.1 Operating and display panel ........................................................................................9
2.2 Analog measurement converter (analog box)........................................................... 12
2.3 Control, measuring and regulating unit .................................................................... 13
2.4 Modes .......................................................................................................................... 18
2.5 Parameters.................................................................................................................. 19
2.6 Description of the RS 3964-interface......................................................................... 20
3Terminal assignment for the CHP module control field..............25
4Index ...............................................................................................34

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1 Switching cabinet
1.1 Utilisation
This cogeneration switchgear is equipped with a
control, output and auxiliary drive component and it is
factory-tested together with the cogeneration module.
The customer only has to connect the power cable
(power current 400 V) of the standard version to the
main low-voltage distribution. The outgoing cable unit
should be secured with fuses and the customer should
provide a contact for selecting or deselecting with the
standard version that selects or deselects depending
upon heat or power needs. Then the cogeneration
module is automatically started by the internal
cogeneration switchgear, switched to the mains and
adjusted to the set or specified load output. The load
adjustment can be either specified by an external
analog signal (0/4–20 mA)orchanged right on the
cogeneration module. If there are malfunctions, the
cogeneration module turns itself off automatically and
the centralised fault indication is available potential-
free for passing onto any control equipment of the
customer. The customer then has to provide space
ventilation and a heating water pump control system
and return temperature increasing mechanism should
also be provided. The pump is requested through a
potential-free contact from the switchgear. The return
control valve is supplied with 24 V~ and triggered with
a 0–10-V signal.
1.2 Equipment and Dimensions
Equipment
Vitobloc 200
CHP switching cabinet
EM-50/81
EM-70/115
EM-100/173
EM-140/207
EM-199/263
EM-238/363
EM-260/390
EM-401/549
EM-530/6601)
cogeneration switchgear
400/230 V, 50 Hz,
cos φ= 1 (adjustable)
1-field
2-field
door
single door, catch on the right
double door, catch in the middle
door lock
8 mm square
8 mm square
protection class
IP 41
IP 41
coat of paint, structured lacquer
silver
silver
1) one additional self-supporting control cubicle with one door, a generator switch and output counter
Tab. 1 Equipment and dimensions
USER NOTE
Design in accordance with DIN
VDE 0660, Part 500 and DIN 6280 Part
7, for ambient temperatures from 0° C
to + 40° C and 70% relative humidity.

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1.3 Displays and measurements
The display shows actual values, targets, limits and fault/status messages.
Display of electrical parameters
1. alternator voltage (L1, L2, L3)
5. network frequency
2. mains voltage (L1, L2, L3)
6. actual cogeneration output
2. busbar voltage (L1, L2)
7. battery voltage
3. alternator current (L1, L2, L3)
8. reactive power factor cos φ
4. alternator frequency
Display of engine parameters
1. oil pressure
4. lambda probe voltage
2. cooling water temperature
5. heating water return temperature into the block-type
thermal power plant (PT 100/2)
3. exhaust gas temperature A
6. total optional heating water return (PT 100/3)
Added potential engine parameters with modules with ANA 16
(EM-199/263, EM-238/363, EM-260/390, EM-401/549, EM-530/660)
7. engine oil temperature (PT 100/4)
10. exhaust gas temperatures B / C/ D
8. mixed gas temperature (PT 100/5)
11. load pressure (optional)
9. mixed cooling water temperature (PT 100/6)
Display of fault messages
1. emergency stop
25. synchronising malfunctioning
2. minimum oil level
26. speed < 50 / pick-up defective
3. minimum cooling water pressure
27. maximum oil level
4. minimum gas pressure
28. maximum return temperature PT 100/2
5. safety temperature limiter tripped
29. maximum heating water temperature PT 100/3
6. maximum alternator winding temperature
30. maximum output exceeded
7. maximum sound hood temperature
31. reverse power (delayed to 50% output –over
50% undelayed)
8. ventilator malfunctioning
32. power regulator malfunctioning
9. cooling water pump malfunctioning
33. lambda regulator malfunctioning
10. maximum exhaust gas counterpressure
34. alternator contact malfunctioning
11. feed switch tripped or turned off
35. ignition malfunctioning
12. external malfunction
36. oil pressure malfunctioning
13. overspeed
37. lambda starting position
14. cooling water temperature
48. knocking malfunction
15. maximum exhaust gas temperature A
54. safety shutdown
16. minimum exhaust gas temperature A
55. engine not stopped (speed > 50 Upm)
17. minimum oil pressure
56. battery low voltage
18. maximum gas pressure
57. alternator low voltage
19. heating water pump malfunctioning
58. alternator excess voltage
20. starting speed < 50 Upm
59. alternator excess current
21. ignition speed
60. alternator load unbalance
22. speed range not reached
61. sealing test / seal test malfunctioning
23. speed < 1,200 Upm
62. line protection malfunctioning
24. enabling malfunctioning
63. sensors malfunctioning

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Added potential fault messages for modules with ANA 16
(EM-199/263, EM-238/363, EM-260/390, EM-401/549, EM-530/660)
66. maximum exhaust gas temperature B
71. minimum exhaust gas temperature D
67. minimum exhaust gas temperature B
72. exhaust gas temperature difference A / B
68. maximum exhaust gas temperature C
76. excess engine temperature PT 100/4
69. minimum exhaust gas temperature C
77. excess gas mixture temperature PT 100/5
70. maximum exhaust gas temperature D
78. excess mixed cooling water temperature PT 100/6
General displays
1. operating hours
3. messages on preliminary start conditions and mode
2. number of starts
Tab. 2 Displays and measurements
1.4 Operating equipment
There are operating elements on the front plate (foil
keyboard)
selector buttons for
visual display for
start-stop-manual-automatic
LED display malfunction
fault acknowledgement
LED ready for operation
alternator switch on/off
display alternator voltage
output higher/lower
display alternator frequency
keyboard for keying in the actual and targets values and limits
display alternator switch on
emergency-off button (resting, with key)
display mains switch on
Manual switch for
manual-zero-automatic for selecting heat
Tab. 3 Selector buttons, visual displays and manual switches
1.5 Power circuit
Vitobloc 200
consisting of
EM-50/81
EM-70/115
EM-100/173
EM-140/207
EM-199/263
EM-238/363
EM-260/390
EM-401/549
EM-530/660
4-pole power switch
160 A
160 A
250 A
630 A
1,000 A
1,000 A
3-pole alternator contact
55 kW
75 kW
160 kW
250 kW
400 kW
560 kW
3 special current transformers
120/0.05 A
120/0.05 A
300/0.05 A
500/0.05 A
800/0.05 A
3 times
1,000/5A and
5/0.05A
Tab. 4 Power circuit for various cogeneration modules

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1.6 Control component
The control component is equipped with a fully automatic
monitoring and control mechanism, 2 separate
microprocessors for the start-stop process for parallel
and stand-by operation including lambda regulation
and line protection/mains monitoring. You can find a
more detailed description in Chapter 2 (Control BMS
2007).
Software functions
start/stop and monitoring program
engine output regulation with start-up function for gentle engine loading/relief with adjustable ramp function
relief control
control function for fixed value/floating value control
lambda regulation including triggering a control valve
analog value processing of the following analog values for limits/switching values and control functions:
–oil pressure, cooling water temperature, exhaust gas temperature, busbar voltage, alternator voltage
–current (L1, L2, L 3), specified output, alternator output, lambda probe voltage
–engine speed, battery voltage
parametering triggering and release values and delay/release times
triggering the coupling relay for controlling the driving machine, auxiliary drives and alternator
synchronising
separate password-protected access levels for EVU, parametering and manual operation
controller for heating water return increasing mechanism including sensors (output signal 24 V~ / 0–10
V
)
module release and deselecting in heat operation with added optional modulation tool with external
Pt100 sensors in the overall heating water return to the block-type thermal power plant
Analog box for
battery voltage, Pt100, NiCrNi, mV, mA, speed, heating water return, lambda regulation, cooling water temperature
Alternator protection, line protection and synchronising
1. low alternator voltage
6. excess alternator temperature
2. excess alternator voltage
7. reverse power protection
3. low alternator frequency/speed
8. precision synchronising blocking relay
4. excess alternator frequency/speed
9. recording speed
5. excess alternator current/alternator short-circuit
Guard function, 3-phase for recording mains failure in parallel operation for
1. low/excess mains voltage
2. low/excess mains frequency
3. vector jump
triggering and release values and the triggering and return delay can be parametered
Potential-free contacts (transferred to terminal)
1. block-type thermal power plant available
5. auxiliary drive requirement with after-run time
2. alternator switch on (cogeneration module in operation)
6. group alarm
3. mains failure
7. service message
4. external mains switch on/off
Tab. 5 Control component, Part 1- software functions, measuring transducer, alternator protection, line protection, synchronising,
guard function and potential-free contacts

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Inputs (transferred to terminal)
1. remote start with potential-free contact provided by the
customer
3. analog signal (0–20 mA) for output regulation in
current operation
2. external system malfunction with potential-free contact
provided by the customer
4. external emergency-off with potential-free
contact provided by the customer
5. Pt100 sensor input for selecting module with modulation after
the heating/overall return temperature
Data transmission
Telecontrol LAN as standard, site-side connection
Electronic machine log
historical memory for recording the min-max-analog values for streamlining operation
fault memory for undeletably recording complete fault chains with operation parameters for selective malfunction
analysis
OPTION remote monitoring
Telecontrol GPRS / Network Connection
the specified variant can be used to monitor the block-type thermal power plant via modem and analyse operating
states
Tab. 6 Control component, part 2 –inputs, data transmission, electronic machine log and remote monitoring
1.7 Auxiliary drive component
Functions
automatic battery charger (24 V, 18 or 40 A) according to the I/U characteristic curve for lead batteries (24 V)
control system for the sound hood exhaust ventilator cowl (0.5 kW-1.5 kW) or ventilator selected by the customer
control system for the cooling water pump (1 kW-2.5 kW)
control system for the gas lane with 2 magnetic valves (24 V, GS; >= 60 VA) and OPTIONAL seal check (24 V, GS)
triggering for lambda valve
transformer for special lambda heater (12 V~)
triggering for cos-φ-controller
control system for speed regulation
triggering for three-way valve (0–10 V) for heating water return increasing mechanism including supply (24 V~)
coupled time relay, contact, motor protection switch and fuses for controlling the driving machine, auxiliary drives
and alternator switch-on
control system for the heating water pump (230 V, 6 A; optional 400 V)
Tab. 7 Auxiliary drive component - software functions

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2 Control system (BMS 2007)
2.1 Operating and display panel
The operating and display panel consists of an LCD
display with graphic capabilities, a resolution of 240 ×
64 pixels and a foil keyboard. The LCD display shows
measurements and operational/fault messages. The
foil keyboard has eight function keys (F1–F8) that
make it possible to directly impact the start-stop
process and adjust target values via a numerical
keypad.
2.1.1 Display
The basic image appears on the LCD display by
showing the cogeneration module, alternator contact,
system-tie circuit breaker and mains with a graph. The
left-handcolumnshows the mode (off, automatic mode
or manual mode), the selection (heat, current or stand-
by operation) and operating hours/starts. In addition, it
has a large display for the momentarymains voltage,
alternator current (single-phase means) and electrical
active power.
2.1.2 Foil keyboard
The control system is operated with the foil keyboard
(numerical buttons and function keys F1–F8).
button
assignment
F1
stop
F2
engine (operational values)
F3
automatic
F4
U-I (voltage and current values)
F5
menu
F6
level (selecting levels 2, 3, EVU and FACTORY –only with password)
F7
fault messages
F8
reset fault acknowledgement
Tab. 8 Assignment of the function keys

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Tab. 9 Assignment of function keys , Part 1 –F1-F6
F1 - stop
The stop button runs down and stops the cogeneration module secured from all modes.
F2 - engine
speed
oil pressure
cooling water temperature
lambda probe voltage
exhaust gas temperature
battery voltage
F3 - automatic
The automatic button passes the operation of the cogeneration module to module control.
F4 - U-I (voltage and current values)
mains voltage
active power
network frequency
cos 
alternator voltage
alternator frequency
alternator current
F5 - menu
When you select the F5 key, you are in the menu and the numerical keypad enables you to call up the functions
below:
password
keying in the password, date and time
controller
keying in the target value and showing the actual value for the temperature controller
release
module, select and deselect parameters after release temperature / modulation (optional)
com
activating the interface for the printer, 3964 passive, 3964 active
option
other optional submenus
version
checking the module serial number and software version
status
print-out of the status of the present operational values
parameter
print-out of the parameters set in level 3 and EVU level
Service
submenu for service and fault archive
F6 - level
When you key in a password for each level, you can reach the following levels with the F6 key:
level 2
manual operation: manual mode, start, alternator release, speed or output higher/lower,
manual cooling water pump operation, manual ventilator operation and min-max values
level 3
parametering: showing and changing all module parameters
EVU level
showing and changing all EVU parameters
FACTORY level
showing and changing all factory parameters
Specific passwords are only issued to authorised persons (such as start-up personnel, service personnel or
operators).

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Service menu (submenu)
There are the "service" and "archive" submenus in the service menu where you can read and set the following
parameters.
If the service interval is defined at 1,800 operating hours and the prewarning time is set to 100 hours (as an
example), a screen saver appears with the message “service due in 100 hours” after 1,700 operating hours and it is
constantly updated. The service technician deletes the message after the service call (password, level 2) and the
next service interval is started. When a module block is activated (FACTORY level), the cogeneration module is
automatically shut down and blocked after the service interval has been overrun 200 operating hours and this module
block can only be deleted with a special password. As many as 8,000 of the last fault messages are shown in the
archive menu. There is also the option of printing out the fault messages separately page for page where one page is
60 messages. You can also delete the archive with a password (FACTORY level).
F7 –fault messages
Pressing the F7 key shows the current faults with date and time. If a different menu is opened when a fault occurs,
the display automatically jumps to the fault menu. You can acknowledge corrected faults with the F8 key.
emergency stop
synchronising malfunctioning
minimum oil level
alternator low voltage
maximum oil level
alternator excess voltage
minimum cooling water pressure
alternator excess current
minimum gas pressure
alternator load unbalance
maximum gas pressure
maximum output exceeded
safety temperature limiter tripped
reverse power (delayed to 50% output –over 50%
undelayed)
maximum alternator windings temperature
power regulator malfunctioning
maximum sound hood temperature
alternator contact malfunctioning
ignition malfunctioning
feed switch tripped or turned off
ventilator malfunctioning
system-tie circuit breaker not turned on
cooling water pump malfunctioning
lambda regulator malfunctioning
minimum oil pressure
external malfunction
oil pressure malfunctioning
battery low voltage
maximum cooling water temperature
network breakdown (message)
maximum temperature PT100/2
deselect after HZW return (message)
heating water control deselect
free after HZW return (message)
maximum exhaust gas temperature
lambda starting position
minimum exhaust gas temperature
engine not stopped
exhaust gas counterpressure too high (OPTIONAL)
line protection malfunctioning
Tab. 10 Assignment of function keys , Part 2 –service menu and F7
service interval
such as 1,800 hours adjustable with a password at the FACTORY level
module block
such as –200 hours adjustable with a password at the FACTORY level
prewarning time
such as 100 hours adjustable with a password at level 2
next service call
time to next service call

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F7 –fault messages
starting speed < 50 Upm
sensors malfunctioning
ignition speed
seal test malfunctioning (OPTIONAL)
speed range not reached
safety shutdown (OPTIONAL)
speed < 1,200 Upm
heating water pump malfunctioning (OPTIONAL)
overspeed
malfunction knocking (OPTIONAL)
speed < 50 / pick-up defective
past service date
enabling malfunctioning
F8 –Reset, fault acknowledgement
You can acknowledge corrected faults with the F8 key.
Tab.11 Assignment of function keys , Part 3 –F7 and F8
2.2 Analog measurement converter (analog box)
The analog measurement converter is installed
directly in the area of the sensitive measuring points
on the engine. It converts the special signals into a
serial data protocol that is transmitted to the control unit
via data line.
Measuring points
Signals to be converted
oil pressure
4–20 mA
cooling water temperature
PT 100
temperature heating water return PT 100/2
PT 100
heating water control deselect PT 100/3
PT 100
exhaust gas temperature A
NiCrNi
lambda probe voltage
0–50 mV
battery voltage
0–30
V
Additionally available measuring points with modules with ANA 16
(EM-199/263, EM-238/363, EM-260/390, EM-401/549, EM-530/660)
Signals to be converted
engine oil temperature PT 100/4
PT 100
mixed gas temperature PT 100/5
PT 100
mixed cooling water temperature PT 100/6
PT 100
exhaust gas temperature B
NiCrNi
exhaust gas temperature C
NiCrNi
exhaust gas temperature D
NiCrNi
load pressure (Option)
4–20 mA
Tab. 12 Analog measurement converter

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2.3 Control, measuring and regulating unit
The control, measuring and regulating unit consists of
a 19” rack with the following components.
Components
Number
power supply unit (24
V
)
1
CPU engine control
1
digital inputs (24
V
)
32
digital outputs (24
V
)
16
analog measuring inputs (0–20 mA)
6
analog target value outputs (0–10 V)
2
CPU line protection
1
voltage inputs (0–300 V~
6
current conversion inputs (0–50 mA ~)
3
Tab. 13 The components of the control, measuring and regulating unit
The control unit carries out the following functions:
Functions
mains monitoring
output regulation and monitoring
alternator voltage monitoring
lambda regulation and gas monitoring
alternator current monitoring
enabling in stand-by operation and 50 Hz regulation
speed regulation and monitoring
temperature controller
synchronising
automatic select and deselect after internal or
external heating water return temperature
oil pressure and oil level monitoring
start-stop process
cooling water, exhaust gas and
alternator temperature monitoring
Tab. 14 Functions

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The specific functions:
Mains monitoring
Mains monitoring checks whether it is above or below the five limits listed below:
The limits and response times are adjustable (EVU level). If mains monitoring detects an unacceptable deviation
from limits and the response time has expired, the cogeneration module will be disconnected from the mains by
turning off the alternator contact. It is enabled again if the mains are within limits within 3 seconds. The machine idles
10 seconds if the network breakdown > 3 seconds. The cogeneration module goes into stand-by operation if external
stand-by operation selection is made within these 10 seconds. Otherwise, the cogeneration module is shut down.
The set mains settling time expires before the system goes into parallel operation after system recovery.
Alternator voltage monitoring
Alternator voltage monitoring leads to one of the two malfunctions listed below if at least one of the three phases of
mains voltage is outside of set limits (level 3):
Alternator current monitoring
Monitoring checks to see whether the alternator current is unacceptably high or whether the three current-phases
have excessively high deviations among one another (limits level 3). There is also hardware-supported alternator
current monitoring that works with a thermo-magnetic trip in the feed switch. If there is a malfunction, it generates at
least one of the fault messages below.
Speed regulation and monitoring
Speed is recorded by the pick-up and the control system regulates speed by passing on an analog target value (0–
10 V) to the governor. Speed monitoring generates the two malfunctions below in the case of an unacceptable
deviation from the appropriate limit:
Tab. 15 Description of the functions, Part 1 –mains, alternator voltages, alternator current monitoring and speed regulation or
monitoring
excess mains voltage
low mains voltage
excess mains frequency
low mains frequency
vector jump
excess alternator voltage
low alternator voltage
excess alternator current
alternator load imbalance
feed switch malfunctioning
overspeed
speed <50 Upm or pick-up defective

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Synchronising
You can use speed regulation to synchronise the alternator to the connected mains.
The following criteria are included for issuing the enabling pulse:
oil pressure and oil level monitoring
Oil pressure is monitored with a 4-20 mA oil pressure sensor that transforms oil pressure into an analog signal where
the range of 0-10 bar is transformed into 4-20 mA. The oil pressure plausibility is also monitored when the machine is
stationary. A floater switch automatically refills the oil. A digital limit contact indicates to the control system that a
malfunction has occurred if the oil level still drops below the acceptable limit generating the following fault messages:
cooling water, exhaust gas and alternator temperature monitoring
The hardware records the following malfunctions and gives the control system a message via digital contacts:
cooling water pump malfunctioning (tripped by motor protection switch)
minimum cooling water pressure (tripped by pressure switch)
safety temperature limiter (tripped by thermostat at 99° C and the cogeneration module is shut down via emergency
stop chain)
Alternator temperature monitoring (tripped by the temperature switch in the alternator windings)
The cooling water temperature is recorded with a PT 100 and the exhaust gas temperature is recorded with a NiCrNi
temperature sensor and transmitted directly to the control system via analog measurement converter. It evaluates the
following faults:
–maximum cooling water temperature
–maximum exhaust gas temperature
–minimum exhaust gas temperature (sensor short-circuit)
Tab. 16 Description of the functions, Part 2 –synchronising, oil pressure, oil levels, cooling water, exhaust gas and alternator
temperature monitoring
frequency difference 0.0–0.5 Hz (EVU level)
voltage difference 0–40 V (EVU level)
phase angle difference 0–10° (EVU level)
synchronising time monitoring (level 3)
minimum oil pressure
oil pressure malfunctioning
minimum oil level

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output regulation and monitoring
The governor is used to adjust the alternator’s active power to an adjustable target value in parallel operation. All
parameters are listed below (level 3) that are relevant to output regulation and output monitoring.
Temperature controller (return increasing mechanism)
A constant controller is built into the module control under the controller menu. The controller uses a signal
(0–10
V
) to trip the customer’s control valve with reference to the regular temperature (either PT100/2 or PT100/3
adjustable in level 2) and the set target value. Its supply voltage (24 V, AC) is available in the module control
switchgear. The KP and TN regulating parameters (level 3) are adjustable along with the direction of control action
and control valve minimum opening.
Module select and deselect after temperature heating water return (only active in the heat mode)
Two limits are built into the module control under the release menu that enable you to deselect and release after
temperature (either PT100/2 or PT100/3 adjustable in level 2). The precise adjustment of these parameters makes
sense when there is no control equipment and you want to prevent emergency shutdown due to high return
temperature. The cogeneration module is internally deselected when it exceeds the deselect limit. The cogeneration
module is automatically reselected after the temperature has cooled down to below the release limit. PT100/2 is the
internal return sensor and PT100/3 is available for other work, preferably in the main return of the module.
Optional modulation: A percentage output value is assigned to the release and deselects limits so you can enter at
release (60°C/100%) and deselect (70°C/50%). That would mean that the module starts at a return temperature of
60°C and would run at 100% output. The module would only run at 50% load at 70°C and it would be deselected
above 70°C. The module would automatically run flexibly in output between the select and deselect values such as
at a return temperature of 65°C at 75% output. Beyond this, a freely adjustable delay is available for the release and
deselect limit.
Lambda regulation
Lambda regulation makes sure that the combustion air fed to the system corresponds to the combustion air actually
needed (lambda = the ratio of fed combustion air to needed combustion air; lambda=1 regulation). At this ratio, the
emission of pollution is lowest using a (lambda regulated) three-way catalyst at the same module output. A step
motor uses a control valve to adjust the mixture feed. The lambda probe voltage (0–1,000 mV) is used as a control
variable for the mixture of fuel/air. The control valve is shut if the lambda probe voltage is greater than the target
value set on the control system and the control valve is opened if the lambda probe voltage drops below the target
value. The cogeneration module is shut down when the step motor is not regulated to the target value within an
adjustable period. The step motor is triggered via two digital contacts. The pulse-interval ratio is adjustable just like
all targets and limits (level 3).
Tab. 17 Description of the functions, Part 3 –output regulation and monitoring, temperature controller, module deselect and select
after temperature and lambda regulation
output target
tolerance window +/- kW with time monitoring for fault
clearance
warm-up limit
maximum limit monitoring for fault clearance
target value ramp (kW/s)
reverse power monitoring for fault clearance

Control system (BMS 2007)
VITOBLOC 200 CHP switching cabinet 17
5780078 GB
Gas monitoring
The gas pressure is monitored via gas pressure guard and a digital input is set at the control system if there is a
malfunction. There is not only a gas pressure guard, but also an optional sealing test for the gas lane. The optional
sealing test is carried out on the cogeneration module when the cogeneration module is shut down (the ignition and
governor are off). A fault message is generated if the sealing test is deficient and the sealing test starts again if the
fault message is acknowledged via acknowledge button on the control system. The cogeneration module can only be
restarted when the sealing test has positive results.
Enabling in stand-by operation
The release of the enabling pulse in stand-by operation depends on voltage and frequency:
The governor adjusts the machine to 50 Hz in stand-by operation depending upon alternator load and relief.
Start-stop process
This is what the start-stop process looks like (no details):
start process
stop process
1. start request
1. request off
2. cooling water pump on
2. relief active
3. ventilation on
3. relief limit reached
4. starter on
4. gas valves closed
5. governor on
5. alternator contact off
6. starting speed reached
6. lambda regulation off
7. ignition on
7. after-run time ignition and governor active
8. gas valves open
8. ignition and governor off
9. ignition speed reached
9. sealing test active (OPTIONAL)
10. starter off
10. after-run time cooling water pump and ventilation active
11. speed range reached (1,500 Upm)
11. cooling water pump and ventilation off
12. release synchronising
12. lambda control valve moves into the starting position
13. synchronising impulse
13. cogeneration module is off
14. alternator contact on
15. output regulation active
16. lambda regulation active
17. cogeneration module in operation
Tab. 18 Description of the functions, Part 4 –gas monitoring, enabling in stand-by operation and start-stop process changes
frequency window
voltage window

Control system (BMS 2007)
18 CHP switching cabinet VITOBLOC 200
5780078 GB
2.4 Modes
Automatic operation
The following modes are available:
The cogeneration module can be operated in the heat operation (parallel operation 100% output), current priority
operation (floating mode after external 0–20 mA signal 50–100% output) and stand-by operation modes. Preliminary
start conditions are necessary for starting the cogeneration module such as lambda controller ready. There may not
be any malfunctions and all fault messages have to be acknowledged. In automatic operation, either there has to be
an external start request for parallel operation (heat or current) for starting (no network breakdown and the system-
tie circuit breaker has to be on) or the external start request for stand-by operation (with network breakdown; system-
tie circuit breaker has to be turned off). Internal release has to be issued (deselect and select after temperature).
Manual mode
Manual mode is available via level 2 (only with password) for start-up and service and you can run through the start-
stop process with the buttons below in individual steps.
Tab. 19 Automatic and manual mode
You can find other functions in the same menu that might be helpful in troubleshooting.
Historical memory min-max values)
You can find this button in the same menu on level 2:
The min-max values menu is a volatile memory that stores the lowest and highest analog values to the next reset
F8. This menu is an excellent aid for start-up, service and troubleshooting. These values are only reset when the
min-max menu is also open.
Options
You can get to the following submenus in the Option menu:
The "Voltages" item on the menu shows the mains voltage, alternator voltage and busbar voltage with their
frequencies. Pressing the F2 key twice shows the cooling water temperature and temperature sensors PT 100/2 and
PT 100/3.
Tab. 20 Historical memory and options
heat operation
current priority operation
stand-by operation
manual
cogeneration module in start readiness (basic prerequisite for all other buttons)
start
cogeneration module starts until it reaches the idle speed range (1,450–1,550 Upm)
alternator
synchronising release and enabling
higher/lower
speed regulation in idle output regulation after enabling
cooling water pump
on/off
ventilator
on/off
min-max values
voltages
misfire menu for gas A and gas B
timer

Control system (BMS 2007)
VITOBLOC 200 CHP switching cabinet 19
5780078 GB
2.5 Parameters
The following are adjustable on level 3 (only with password):
Level 3 –parametering
1. output target
electrical active power
2. warm-up limit
cooling water temperature limit at 50% output
3. output limit
emergency shutdown if limits exceeded
4. reverse power
emergency shutdown with negative output limit
5. output ramp higher/lower
output target change in kW/s
6. monitoring power regulator
emergency shutdown with target value deviation after time
7. power regulator dead band
regular dead band in kW
8. knocking
output reduction with digital knocking input
9. lambda probe target value
10. lambda regulation impulse time
impulse duration open/close command
11. lambda regulation dead time
interpulse period between the open/close commands
12. lambda regulator dead band
regular dead band
13. monitoring lambda regulator
emergency shutdown with target value deviation after time
14. maximum cooling water
emergency shutdown if limits exceeded
15. maximum exhaust gas temperature
emergency shutdown if limits exceeded
16. minimum exhaust gas temperature
emergency shutdown if below limits
17. exhaust gas temperature release
maximum release if below limit after exhaust gas
18. battery low voltage
emergency shutdown if below limits
19. starter limit
speed limit for starter off
20. overspeed
emergency shutdown if limits exceeded
21. after-run time / start-up time ventilator
after-run time or start-up time of ventilator
22. after-run time / start-up time cooling water
pump
after-run time or start-up time of cooling water pump
23. minimum temperature controller, target
value
minimum opening, spare target
24. Kp/Tn temperature controller
Kp and Tn value input
25. governor 0=10–0 V, 1=0–5 V
target controller specification 10–0 V (GAC) or 0–5 V (Heinzmann)
26. spare
27. excess alternator current
emergency shutdown if limits exceeded
28. alternator load imbalance
emergency shutdown if limits exceeded
29. low alternator voltage
emergency shutdown if below limits
30. excess alternator voltage
emergency shutdown if limits exceeded
31. temperature PT 100/2
emergency shutdown if limits exceeded
32. temperature PT 100/3
emergency shutdown if limits exceeded
33. minimum oil pressure
emergency shutdown if below limits
34. offset lambda probe
potential adjustment if there are analog parameter differences
35. offset NiCrNi
potential adjustment if there are analog parameter differences
36. offset engine cooling water
potential adjustment if there are analog parameter differences
37. offset temperature PT 100/2
potential adjustment if there are analog parameter differences
38. offset temperature PT 100/3
potential adjustment if there are analog parameter differences
39. offset oil pressure
potential adjustment if there are analog parameter differences
40. offset battery voltage
potential adjustment if there are analog parameter differences
Tab. 21 Parameter, Part 1 –level 3

Control system (BMS 2007)
20 CHP switching cabinet VITOBLOC 200
5780078 GB
EVU level
The following parameters are adjustable on the EVU level (only with password):
FACTORY level
The following parameters are adjustable on the FACTORY level (only with password):
Tab. 22 Parameter, Part 2 –EVU and FACTORY level
2.6 Description of the RS 3964-interface
Interface parameter
The module interface is configured as below:
type
RS232 (9-pole plug)
baud rate
9,600 baud
parity
none
data bits
8
stop bits
1
The parameters are fixed so that they cannot be changed with the operator panel.
DK3964R data request
Remote service requests the module data by sending the character Hex 22 in the DK3964R procedure. Then
module control sends a data block of 102 bytes to remote service. Section data item list CHP UNI 001 describes the
structure of the data block from page 21.
Tab. 23 Interface parameters and DK3964R data request
1. low mains voltage
shutdown if below limits
2. excess mains voltage
shutdown if limits exceeded
3. low mains frequency
shutdown if below limits
4. excess mains frequency
shutdown if limits exceeded
5. mains settling time
release after system recovery
6. synchronising delta-F
frequency difference to enabling release
7. synchronising delta-U
voltage difference to enabling release
8. phase angle difference
phase angle difference to enabling release
9. vector jump angle
sudden phase change, shutdown if limits exceeded
10. spare
1. module number
serial number
2. operating hours
correct option
3. starts
correct option