Siemens LMV52 series User manual

Based on the following
software versions:
LMV50... : V10.20
LMV51... : V05.10
LMV51.3… : V05.10
LMV52.2.. : V05.10
LMV52.4... : V10.20
Int. LR module: V02.10
Int. VSD module: V01.50
A
ZL52...: V05.00
PLL52...: V01.50
CC1A7550.5en
07.07.2015
Building Technologies Division
LMV52…
Burner management system for forced draft
burners
LMV52.4…:
- COx supervision and control
User Manual
The LMV5 and this User Manual are intended for OEMs which integrate the LMV5
in their products!
Note!
This documentation is only valid together with the LMV5... Basic
Documentation P7550.

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Contents 07.07.2015
Contents
1Supplementary documentation....................................................................3
2Warning notes................................................................................................4
3Typographical conventions..........................................................................4
4COx supervision and control........................................................................5
4.1General ............................................................................................................5
4.2Compatibility of the COx functions...................................................................5
4.3Functioning principle of COx supervision.........................................................5
4.4Hardware prerequisite / Connection diagram ..................................................6
4.5Operating modes of COx supervision ..............................................................6
4.5.1COx Alarm operating mode .............................................................................7
4.5.2COx Control operating mode ...........................................................................8
4.6Increasing the manipulated variable in case of COx signal (O2ModOffset,
formerly O2Offset) ...........................................................................................9
4.7Setting notes ..................................................................................................10
4.7.1Parameterizations ..........................................................................................10
4.7.2Setting fuel-air ratio control ............................................................................10
4.7.3Setting the O2 trim controller .........................................................................11
4.7.4Setting the COx supervision ..........................................................................11
4.8Display on the AZL52.....................................................................................12
4.9Displaying the O2 trim controller status .........................................................12
5List of error messages of LMV5 system....................................................13
6Revision history...........................................................................................17

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Supplementary documentation 07.07.2015
1 Supplementary documentation
Product type Type of documentation Documentation number
AZL5... User Documentation AZL5... Modbus A7550
LMV5... User Documentation
Basic diagram of LMV5... for 2 types of gas
A7550.1
LMV5... User Documentation
Basic diagram of LMV5... for 2 types of liquid fuel
A7550.3
LMV5... User Documentation
Assembly of VKF41...C gas damper with ASK33.4 mounting kit
to the SQM45.295A9 actuator
A7550.4
LMV5... Setting Lists (parameter and error list) I7550
ACS450 Operating Instructions J7550
LMV5… Installation Guide J7550.1
LMV5... Data Sheet N7550
LMV5... Basic Documentation P7550
LMV5... Product Range Overview
This document contains a complete overview
Q7550
AZL52 / LMV51 User Manual U7550
AZL52 / LMV51 User Manual U7550.1
AZL52 / LMV52 User Manual U7550.2
AZL52 / LMV52 User Manual U7550.3
AZL52 / LMV50 User Manual U7550.4
AZL52 / LMV50 User Manual U7550.5

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Warning notes 07.07.2015
2 Warning notes
Warning!
The safety, warning, and technical notes given in the Basic Documentation on
the LMV5 (P7550) apply fully to the present document also!
To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
The LMV5 is a safety device! Do not open, interfere with or modify the unit.
Siemens will not assume responsibility for any damage resulting from
unauthorized interference!
3 Typographical conventions
Safety notes
This User Manual contains information which must be observed to ensure your
personal safety and to prevent damage to equipment and property. The instructions
and notes are highlighted by warning triangles and arrows and are presented as
follows, depending on the hazard level:
Warning means that death, severe personal injury or substantial
damage to property can occur if adequate
precautionary measures are not taken.
Note draws your attention to other information about the
product and its handling contained in other pieces of
documentation.
Only qualified personnel are allowed to commission and operate the unit. Qualified
personnel in the context of the safety-related notes contained in this document are
persons who are authorized to commission, ground and tag devices, systems and
electrical circuits in compliance with established safety practices and standards.
Note the following:
The unit may only be used on applications described in the technical documentation
and only in connection with third-party products and components approved or
recommended by Siemens.
The products can only function correctly and safely if shipped, stored, set up and
installed correctly, and operated and maintained as specified.
Qualified personnel
Correct use

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COx supervision and control 07.07.2015
4 COx supervision and control
4.1 General

Note!
The COx sensor is not included in the Siemens AG scope of delivery.
OEM customer is responsible for checking that the sensor is suitable for the
functions described below.
4.2 Compatibility of the COx functions
The new COx functions are available from the following software versions:
- PLL52 from software version V01.40
(as this requires a supply air sensor temperature range of >400 °C).
- LMV52.4 from software version V10.10
4.3 Functioning principle of COx supervision
For the purpose of supervising the COx quantities during combustion, the LMV52.4
offers the option of connecting a COx measurement transducer to the PLL52.
The states of the COx measurement transducer switching output have the following
meanings:
Contact open: COx present
Contact closed: No COx present
These are evaluated by the LMV52.4 when COx supervision is active.
When COx supervision is active, line breaks, faults in the PLL52, and faults in the bus
communication between the LMV52.4 and PLL52 result in a safety shutdown. This is
also the case during O2 trim control.
Warning!
The connections of the COx sensor to the LMV52.4, and the COx functions in
the LMV52.4, are not established in a fail-safe manner.

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4.4 Hardware prerequisite / Connection diagram
The following hardware is required for COx supervision with LMV52.4:
COx sensor with a potential-free switching contact (NO contact).
The COx limit value at which the contact switches is defined in the COx
measurement transducer.
The COx sensor must be suitable for the fuels being used.
The PLL52, input X87 must be available for the COx sensor connection:
- For this, the supply air temperature sensor for calculating the firing efficiency can,
alternatively, be connected to input X60 of the load controller and activated by
means of the PLL52 parameter AirTempX60PT1000.
Parameter AirTempX60PT1000 (deactivated, activated)
- The Startmode parameter for O2 trim control must be set to standard or
IgnPtWoutTC, as all other start modes require a temperature sensor at input
X87 of the PLL52. In terms of the CO functions, we recommend using the
standard start mode only.
Parameter Startmode (standard, Ign Load TC, IgnPtWithTC, IgnPtWoutTC)
If input X87 on the PLL52 is used to connect the COx sensor, the PLL52 parameter
SupAirTempSens must be set to Pt1000.
COx control is only possible as of PLL52 software version V01.40, as this requires
a temperature range for the supply air temperature sensor of >400 °C.
R1 R2
COxmax
X87
Pin 2
X87
Pin 1
PLL52...
7550d46/0712
- Resistor R1: 7.15 kΩ(±10%)
- Resistor R2: 3.6 kΩ(±10%)
- Relay in no-load status: COx threshold exceeded
- Relay switched: COx threshold not achieved
4.5 Operating modes of COx supervision
With the OptgMode COx parameter, one of the two COx operating modes COx Alarm
or COx Control can be set, and the COx functions deactivated.
Parameter Gas: OptgMode COx (deactivated / COx Alarm / COx Control)
Oil: OptgMode COx (deactivated / COx Alarm / COx Control)
Suggested wiring

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4.5.1 COx Alarm operating mode
For straightforward supervision of the COx value, the parameter OptgMode COx must
be set to COx Alarm.
Phases of COx alarm:
Once prepurging is complete (upon entering phase 36), a single check is
performed to determine whether a COx signal is present.
If a COx signal is present, the fault response takes place immediately.
In the operating phases (60, 62), checks are performed continuously to determine
whether a COx signal is present after a waiting time has elapsed
(NumberTauSuspend * Tau Low-Fire).
If the COx signal is then present for longer than the parameterizable time COx
Alarm, the fault response takes place.
Fault response:
A safety shutdown is performed with a new startup and, depending on the O2 trim
controller repetition counter, lockout takes place.
Parameters:
The waiting time referred to above for the COx Alarm is dependent on the Tau
Low-Fire time constant determined by O2 trim control, and can be set using the
NumberTauSuspend parameter as a multiple of Tau Low-Fire:
Parameter NumberTauSuspend (0..140) * Tau Low-Fire)
Permissible time for a COx signal to reach in the operating phases (60 and 62)
before the fault response takes place:
Parameter Time COx Alarm (0..600s)

Note!
If prepurging is skipped, the COx value is not checked in this section of the
startup process.

Note!
The NumberTauSuspend parameter is also used as the locking time for O2 trim
control.

Note!
The sampling time of the COx signal is approximately 3 seconds.
This must be taken into account when setting the test time Time COx Alarm e.g.,
for a required maximum response time of 10 seconds, the parameter must be set
to 7 seconds.
Warning!
As the connections of the COx sensor to the LMV52.4, and the COx
functions in the LMV52.4, are not established in a fail-safe manner, use the
COx supervisory function always in conjunction with the O2 alarm function.

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4.5.2 COx Control operating mode
This operating mode is only implemented for modulating operation.
The function is not available in multi-stage oil operation.
In addition, the O2 trim control function must be activated (O2 trim controller operating
modes: O2 Control or conAutoDeac).
This operating mode is activated by setting the OptgMode COx parameter to COx
Control.
Parameter Gas: OptgMode COx (deactivated / COx Alarm / COx Control)
Oil: OptgMode COx (deactivated / COx Alarm / COx Control)
In addition to COx supervision, the O2 value (an air supply) is then increased by means
of the O2 trim control function if a COx signal is present during operation.
This is not a conventional COx control (with a COx setpoint, actual value, and control
difference), but instead is an O2 trim control effect in relation to the COx value.
COx supervision takes place in the same way as in the COx Alarm operating mode.
Phases of COx control:
The COx controller is active in the operating phases (60, 62).
COx control is released at the same time as O2 trim control.
Value of the O2 increase:
The O2ModOffset parameter for the relevant fuel is used to specify how much the O2
value increases.
This is the same parameter as the one already used to increase the O2 value in the
case of fast load changes (see chapter Increasing the manipulated variable in case of
fast load changes in the LMV5 Basic Documentation (P7550)).

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4.6 Increasing the manipulated variable in case of
COx signal (O2ModOffset, formerly O2Offset)
If the COx maximum value is exceeded, the contact is closed (see chapter Hardware
prerequisite / Connection diagram).
In order to prevent this, the user can use parameters to set an offset for the O2 value in
the event that a COx signal occurs.
The next increase can only be made once the locking time has elapsed (waiting time of
2 x Tau current load).
There will be no increase of the O2 value when O2 trim control is deactivated.
The parameter defines the increase of the O2 value in %.
Example:
O2ModOffset = 0.8%, O2 actual value 1.4% In the event of COx signal, the O2 value
reached will be 2.2%.
Actual O2 value
O2ModOffset
1.4%
2.2%
O2 setpoint
7550d49e/1114
Figure 1: Increasing the manipulated variable in the case of a COx signal
Parameter Gas: O2ModOffset (0..5%)
Oil: O2ModOffset (0..5%)
Fault response:
The test time Time COx Alarm is started at the same time as the O2 value is increased.
Once the test time is complete, and if the COx signal is still present in spite of
increasing the air supply, a fault response takes place in the form of a safety shutdown
with new startup and, depending on the O2 Control repetition counter, lockout is
performed.
Parameter Time COx Alarm (0..600 s)

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4.7 Setting notes
(Summary of the most important rules for setting COx control)
4.7.1 Parameterizations
Parameterize all truly air-regulating actuators as such
If the parameter settings are changed, O2trim control must be readjusted
First of all, the O2 trim control must be set with deactivated COx sensor (see
chapter Operating modes of COx supervision)
Parameter OptgMode COx Gas (deactivated, COx Alarm, COx Control)
4.7.2 Setting fuel-air ratio control
Caution!
Set sufficient excess O2
Set the amount of excess air of the ratio control curve such that, whatever the
environmental conditions (combustion chamber and fuel pressure, temperature
and pressure of the combustion air), the set residual O2 content will lie above the
O2 setpoints required by O2 trim control.
Example:
Figure 2: Setting fuel-air ratio control
Parameterized load proportional to the fuel rate
The burner load parameterized at the curvepoints must be proportional to the
actual burner load. To make the correct setting, determine the burner load with
the help of the fuel meter.
Curvepoint 1
The first curvepoint should have an adequate distance below curvepoint .
This means that the curve for reducing the air rate is also defined below point
. As a guide value, point should lie at about half the load of point .
Point should be smaller than or equal to the low-fire load.
Note!
The following values can be entered at the AZL52... from software version V05.00 for
the LMV52.2... and software version V10.10 for the LMV52.4...:
(O2 ratio control - O2 setpoint) 0.1%
(O2 setpoint - O2 min value) 0.1%

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4.7.3 Setting the O2 trim controller
Setting the O2 min. value
The O2 min. value should be set as low as possible to ensure a high level of
availability.
Caution!
Above or at the O2 min. value, hazardous conditions must not permanently
occur.
Guide values: CO = 2,000 ppm, soot number 3.
The values can vary, depending on the type of plant.
Adequate distance between O2 setpoint and O2 min. value
The distance should be a minimum of 1...1.5% O2. If a smaller distance is used,
the ratio control curve must be set as accurately as possible, in accordance with
chapter Setting notes- Setting fuel-air ratio control.
All O2 setpoints must be adjusted under the same environmental conditions
It is important to adjust the O2 setpoints at the same ambient temperatures. If,
later, individual setpoints are changed, all setpoints of the curvepoints must be
readjusted since environmental conditions will probably be different from those at
the time the initial settings were made.
4.7.4 Setting the COx supervision

Note!
The OEM customer is responsible for setting the COx sensor system.
Set the following parameters as described in the chapter Operating modes of COx
supervision:
Parameter NumberTauSuspend (5..140)
Time COx Alarm (0..600 s)
O2ModOffset (0..5% ) (only in COx controller mode)
The function is activated as alarm or controller with the parameter OptgMode COx Gas.
Parameter OptgMode COx Gas (deactivated, COx Alarm, COx Control)

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4.8 Display on the AZL52
If a COx signal occurs, a notification is output on the AZL52.
The notification is automatically deleted if no further COx signals are present.
4.9 Displaying the O2 trim controller status
Also refer to the chapter Displaying the O2 trim controller status in the LMV5 Basic
Documentation (P7550).
The status of the O2 trim controller can be read out with the AZL52 via data point State
O2 Ctrl.
deactivated The O2 trim controller is not active. The system operates along the
ratio control curves.
locked The manipulated variable of the O2 trim controller is held at the last
value.
LockTStart Locking time following startup until the O2 trim controller is initialized
or released. The locking time is necessary in order to ensure that the
actual O2 value is measured. The O2 trim controller is still
deactivated or locked
InitContr The O2 trim controller is initialized. The O2 trim controller is locked.
LockTLoad The O2 trim controller is locked due to a load change.
active The O2 trim controller is active and operates to the O2 setpoint.
LockTCAct If switching functions (control interventions by the O2 trim controller)
are active, the O2 trim controller is locked for 2 x Tau.
LockCOx If the manipulated variable is affected due to the COx signal, the O2
and COx controllers are locked.
Process data
display values
State O2 Ctrl (deactivated, locked, LockTStart, InitContr,
LockTLoad, active, LockTCAct, LockCOx)

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List of error messages of LMV5 system 07.07.2015
5 List of error messages of LMV5 system
Error
code Diagnostic code Device Display Meaning for the LMV5 system Troubleshooting
B6 # LMV5 COx alarm error messages
B6 01 LMV5 COx value invalid COx signal is not within the defined range
of values or there is a cable break.
Check connection between the COx sensor and PLL52, check
cable connection on the PLL52 basic unit, correct resistance
dimensioning
B6 02 LMV5 COx monitoring time COx alarm
undefined No valid value has been entered in the parameter Time COx Alarm Set Time COx Alarm parameter correctly
B6 03 LMV5 COx monitoring time constant Tau
undefined Missing path time constant Perform adaption of O2 trim control, Tau Low-Fire and / or Tau High-Fire have no valid value
B6 04 LMV5 COx limit exceeded in operation COx indicated by COx sensor Optimize combustion settings
B6 05 LMV5 COx limit exceeded in prepurge COx indicated by COx sensor Optimize combustion settings
B7 # LMV5 PLL52 error during active COx supervision
B7 00..3E LMV5... COx supervision
No valid COx signal from PLL52 Error messages from the PLL52... when COx supervision is active Check the supply air temperature at the connection (short- circuit, open-circuit) Check the ambient temperature
B7 01 O2M
No valid COx signal from PLL52 CRC fault during ROM test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 02 O2M
No valid COx signal from PLL52 CRC fault during RAM test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 04 O2M
No valid COx signal from PLL52 Fault during key value check If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 05 O2M
No valid COx signal from PLL52 Error code for time block overflow If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 07 O2M
No valid COx signal from PLL52 Sync fault or CRC fault If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 08 O2M
No valid COx signal from PLL52 Error code for main loop counter If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 09 O2M
No valid COx signal from PLL52 Fault during stack test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 0A O2M
No valid COx signal from PLL52 Feedback values invalid If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 10 O2M
No valid COx signal from PLL52 Nernst voltage outside the valid range Check the connection (correct polarity, short-circuit)
B7 12 O2M
No valid COx signal from PLL52 Thermo couple voltage outside the valid
range Check connections (polarity, short-circuit, open-circuit). Check power supply to the O2 module.
Check fuse F2 on the O2 module.
Check heating control on the QGO.

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List of error messages of LMV5 system 07.07.2015
Error
code Diagnostic code Device Display Meaning for the LMV5 system Troubleshooting
B7 13 O2M
No valid COx signal from PLL52 Compensation element voltage outside
the valid range Check connections (polarity, short-circuit, open-circuit).
Check housing temperature of the QGO (temperature inside -
25...120 °C)
B7 15 O2M
No valid COx signal from PLL52 Temperature of combustion air sensor
outside the valid range (-20...+800 °C) Check the connection (correct polarity, short-circuit) Check ambient temperature
B7 16 O2M
No valid COx signal from PLL52 Temperature of flue gas sensor outside
the valid range (-20...+800 °C) Check the connection (correct polarity, short-circuit) Check ambient temperature
B7 17 O2M
No valid COx signal from PLL52 Fault during combustion air sensor test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 18 O2M
No valid COx signal from PLL52 Fault during thermo couple test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 19 O2M
No valid COx signal from PLL52 Fault during compensation element test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 1A O2M
No valid COx signal from PLL52 Fault during channel comparison of O2
signal If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 1B O2M
No valid COx signal from PLL52 Fault ADC test voltages If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 20 O2M
No valid COx signal from PLL52 Temperature of QGO measuring cell too
low Check mains power supply on O2 module.
Check fuse F2 on O2 module.
Check connection between O2 module and QGO heating
B7 21 O2M
No valid COx signal from PLL52 Temperature of QGO measuring cell too
high Check QGO temperature
B7 22 O2M
No valid COx signal from PLL52 Fault during calculation test If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 23 O2M
No valid COx signal from PLL52 Measured internal resistance of the QGO
measuring cell is smaller than 5 Ohm or
greater than 150 Ohm
Check the connection (correct polarity, short-circuit)
If fault occurs after more than 1 year, QGO may have reached
the end of its service life
 Replace QGO
B7 24 O2M
No valid COx signal from PLL52 Measured response time of the QGO
measuring cell exceeds 5 seconds Check mounting position of QGO.
Check to see if QGO is dirty.
If fault occurs after more than 1 year, QGO may have reached
the end of its service life
 Replace QGO
B7 25 O2M
No valid COx signal from PLL52 Fault occurred during O2 sensor test Check fluctuations of the O2 value
B7 30 O2M
No valid COx signal from PLL52 CAN fault If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module

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List of error messages of LMV5 system 07.07.2015
Error
code Diagnostic code Device Display Meaning for the LMV5 system Troubleshooting
B7 31 O2M
No valid COx signal from PLL52 CRC fault of a parameter page Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module
B7 32 O2M
No valid COx signal from PLL52 Page too long open Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module
B7 33 O2M
No valid COx signal from PLL52 Page disrupted Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module
B7 34 O2M
No valid COx signal from PLL52 Invalid access to parameters Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module

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Error
code Diagnostic code Device Display Meaning for the LMV5 system Troubleshooting
B7 38 O2M
No valid COx signal from PLL52 Fault during copying of a parameter page Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module
B7 3E O2M
No valid COx signal from PLL52 External plausibility fault.
This type of fault covers possible faults
occurring due to invalid presettings in the
drive commands. In response, the
presettings will be ignored
Reset the unit
Attention!
If fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset:
Restore parameters from AZL5.
Otherwise, replace the O2 module
B7 3F O2M
No valid COx signal from PLL52 Internal plausibility fault.
This type of fault covers possible errors
that cannot practically occur
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
B7 41 LMV5 No valid COx signal from PLL52 Cable connection to the PLL52
disconnected Check CAN wiring / check power supply PLL52…
B7 42 LMV5 No valid COx signal from PLL52 PLL52 is sending messages but these are
incorrect Check cable connection / wiring to the PLL52
BE 01 LMV5 COx operating mode is not possible with the selected O2
operating mode
COx supervision must not be combined
with the setting for a temperature-
compensated start mode in O2 trim
control. Both settings use the supply air
sensor
Parameterize the O2 start mode to standard or to
IgnPtWoutTC, or set COx supervision to deactivated.

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6 Revision history 07.07.2015
6 Revision history
Changes to the replacement release 2012 / 2013:
- COx control with LMV52.4 and PLL52.
With the LMV52.4 (software version V10.20), COx control is available in conjunction
with the PLL52, software version V01.40 and above (as the PLL52 requires a
temperature range for the supply air temperature sensor of >400 °C).
Siemens AG Building Technologies Division
Berliner Ring 23
D-76437 Rastatt
Tel. [phone]
Fax [phone]
www.siemens.com
© 2015 Siemens AG Building Technologies Division
Subject to change!