Pilz PSS SB FT, Basic license User Manual
PSS Standard Function Blocks
MBS Burner Management
Version 4.0
Programmable control systems PSS
®
Operating Manual – No. 19532-EN-07
This document is a translation of the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes.
Suggestions and comments for improving this documentation will be gratefully received.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®, SafetyEYE®,
®
SafetyNET p
, the spirit of safety® are registered and protected trademarks of
Pilz GmbH & Co. KG in some countries.
SD means Secure Digital.
Contents
Introduction 1-1
MBS Modular Block System 1-2
Categories / requirement classes 1-3
Overview of manual 1-4
Definition of symbols 1-5
Terminology 1-6
Overview 2-1
Software package 2-1
Operation 2-1
Range 2-2
Safety 3-1
Safety guidelines 3-1
Use of qualified personnel 3-1
Warranty and liability 3-1
Application guidelines 3-2
Standards 3-3
Fault detection 3-4
Feasibility test 3-4
Fault prevention 3-4
Intended Use 4-1
Application 4-1
System software 4-1
Intended use of the standard function blocks 4-2
SB149: Sequence control 4-2
SB150: Flame monitoring 4-2
SB151: Transient suppression 4-2
SB152: Burner: start and operator elements 4-3
SB153: Control and position monitoring of flaps 4-3
1Modular Block System: Burner Management
Contents
SB154: Control and position monitoring of valves 4-4
SB155: Pre-purge 4-4
SB156: Tightness control 4-4
SB157: Several ignition attempts 4-4
SB158: Ignition 4-5
SB159: Run 4-5
SB160: Blower 4-5
MBS Basics 5-1
Block design 5-1
Structure 5-1
Formal parameters and actual parameters 5-2
Administration data blocks DB015, DB016 and DB017 5-3
Structure of the administration data blocks 5-3
Blocks contained in the administration data blocks 5-5
Input parameter SSNR 5-7
Example 5-8
Fault diagnostics 5-9
Error types 5-9
Fault diagnostics using the administration data blocks 5-10
Temporary flag range in MBS blocks 5-11
Output parameter ENBL 5-11
Assignment of input and output parameters 5-12
Minimum scan time 5-12
Global parameters 5-13
Standard Function Blocks 6-1
SB149: Sequence control 6-1
Block header 6-1
Input parameters 6-1
Output parameters 6-2
Function: 6-2
Error messages 6-3
Blocks required 6-3
2
Modular Block System: Burner Management
Programming guidelines 6-4
Timing diagrams 6-9
Setting / resetting the step without time delay and monitoring time 6-9
Setting/resetting the step with time delay but without monitoring
time 6-11
Setting/resetting the step without time delay but with monitoring
time 6-12
Setting/resetting the step with time delay and monitoring time 6-13
SB150: Flame monitoring 6-14
Block header 6-14
Input parameters 6-14
Output parameters 6-15
Function: 6-15
Error messages 6-15
Blocks required 6-16
Programming guidelines 6-17
Timing diagrams 6-19
Signal cycle with an uninterrupted burner start-up or uninterrupted
burner stop sequence 6-19
Flame monitor error 6-20
Spurious signals when monitoring for “flame not established” 6-20
Spurious signals before and during monitoring for
“flame established” 6-21
Spurious signals during monitoring for “flame established” 6-21
SB151: Transient suppression 6-22
Block header 6-22
Input parameters 6-22
Output parameters 6-23
Function 6-23
Error messages 6-23
Blocks required 6-24
Programming guidelines 6-24
Timing diagrams 6-25
Setting the ENBL output automatically when the signal is
recovered 6-25
Setting the ENBL output after a reset when the signal is
recovered 6-25
Spurious signal sequence at BASE input 6-26
Spurious signal sequence at AuSt input 6-26
3Modular Block System: Burner Management
Contents
SB152: Burner: start and operator elements 6-28
Block header 6-28
Input parameters 6-28
Output parameters 6-30
Function 6-30
Error messages 6-31
Blocks required 6-32
Programming guidelines 6-33
Timing diagrams 6-34
Burner start-up without automatic start after a controlled
shutdown 6-34
Failure of safety sequence, flame monitor sequence and general
faults 6-34
Failure of monitor sequence 6-35
Monitoring of air pressure 6-36
Restart after flame failure or flame monitoring fault 6-37
Automatic restart after air deficiency 6-38
Spurious signals 6-38
SB153: Control and position monitoring of flaps 6-40
Block header 6-40
Input parameters 6-40
Output parameters 6-41
Function 6-41
Error messages 6-41
Blocks required 6-42
Programming guidelines 6-43
Timing diagrams 6-44
No automatic start after controlled shutdown 6-44
Monitoring of end positions 6-44
Missing acknowledgement 6-45
Multiple drive commands 6-46
Spurious fault signal reset 6-46
Test to ensure safe monitoring time 6-47
SB154: Control and position monitoring of valves 6-48
Block header 6-48
Input parameters 6-48
Output parameters 6-49
Function 6-49
Error messages 6-49
Blocks required 6-50
Programming guidelines 6-51
4
Modular Block System: Burner Management
Timing diagrams 6-52
Valve closed without power 6-52
Reset spurious acknowledgements 6-53
Spurious acknowledgement as valve opens 6-53
SImultaneous OPEN and CLOSE commands 6-54
Multiple recurring OPEN and CLOSE commands 6-54
SB155: Pre-purge 6-56
Block header 6-56
Input parameters 6-56
Output parameters 6-56
Function 6-56
Error messages 6-57
Blocks required 6-57
Programming guidelines 6-58
Timing diagrams 6-58
Signal cycle with interrupted and uninterrupted pre-purge
process 6-58
Spurious signal sequence at NEXT and RDY inputs 6-59
SB156: Tightness control 6-60
Block header 6-60
Input parameters 6-60
Output parameters 6-61
Function 6-61
Error messages 6-62
Blocks required 6-63
Programming guidelines 6-64
Timing diagrams 6-67
Signal cycle of uninterrupted tightness control on a plant with an
exhaust valve 6-67
Signal cycle of uninterrupted tightness control on a plant without
an exhaust valve 6-69
Loss of minimum pressure signal as valve VAV1 is incorrectly
seated 6-70
Loss of maximum pressure signal as valve VAV3 or VAV4 is
incorrectly seated 6-71
Enable and cancel tightness control via SyOK 6-72
Spurious, undefined NEXT input combinations 6-73
5Modular Block System: Burner Management
Contents
SB157: Several ignition attempts 6-74
Block header 6-74
Input parameters 6-74
Output parameters 6-75
Function 6-75
Error messages 6-75
Blocks required 6-76
Programming guidelines 6-76
Timing diagrams 6-80
Counting ignition attempts where time is not exceeded 6-80
Counting ignition attempts where time is exceeded 6-81
Successful ignition after first attempt failed 6-81
Spurious signals 6-82
SB158: Ignition 6-84
Block header 6-84
Input parameters 6-84
Output parameters 6-85
Function 6-85
Error messages 6-85
Blocks required 6-86
Programming guidelines 6-87
Timing diagrams 6-91
Automatic ignition cycle when no parameters are set for manual
ignition 6-91
Automatic ignition cycle when parameters are set for manual
ignition 6-93
Spurious signals at NEXT input 6-94
Failure of SyOK in all NEXT steps 6-95
Spurious signals at MANU and S_IG inputs 6-95
Error analysis during manual ignition start-up 6-96
SB159: Run 6-98
Block header 6-98
Input parameters 6-98
Output parameters 6-98
Function 6-99
Error messages 6-99
Blocks required 6-100
Programming guidelines 6-101
Timing diagrams 6-104
Uninterrupted burner start-up or uninterrupted burner stop
sequence 6-104
6
Modular Block System: Burner Management
Failure of SyOK in all NEXT steps 6-106
Spurious signals at NEXT input 6-107
SB160: Blower 6-108
Block header 6-108
Input parameters 6-108
Output parameters 6-108
Function 6-109
Error messages 6-109
Blocks required 6-110
Programming guidelines 6-110
Timing diagrams 6-111
Uninterrupted blower control 6-111
Spurious, conflicting control signals 6-111
Connections required between the SBs 6-112
Sequence for calling SBs 6-115
Link Blocks 7-1
Check list 7-1
Examples 8-1
Application and parameters of individual blocks 8-1
Managing enables 8-2
Using step monitoring time W_E of SB149 8-6
W_E as ignition ready time 8-6
Using delay time D_E on SB149 8-8
Executing a function during
D_E as pre-purge time 8-8
Executing a function after D_E 8-10
Delayed shutdown of blower 8-10
Building-up minimum air pressure 8-12
Driving the air flaps 8-14
Nesting of step sequences 8-16
D_E 8-8
7Modular Block System: Burner Management
Contents
Appendix 9-1
Assignment table: Category « Requirement class 9-1
Standard function blocks: current versions 9-2
Changes to the standard function blocks 9-3
SB 149: Sequence control 9-3
SB151: Transient suppression 9-4
SB152: Burner: start and operator elements 9-4
SB 153: Control and position monitoring of flaps 9-5
SB 154: Control and position monitoring of valves 9-5
SB 155: Pre-purge 9-6
SB156: Tightness control 9-6
SB 157: Several ignition attempts 9-6
Changes to the operating manual 9-7
Changes from Version I to Version II 9-7
Changes from Version II to Version III 9-7
Changes from Version III to Version IV 9-8
Changes in Version 05 9-8
Changes in Version 06 9-8
Changes in Version 07 9-8
8
Modular Block System: Burner Management
Introduction
This manual describes how to manage the standard function
blocks in the “MBS Burner Management” software package in accordance
with their intended use.
Standard function blocks in the “MBS Burner Management” software
package are part of the Pilz MBS Modular Block System. They can be
used in the failsafe section of a PSS-range programmable safety system.
To fully understand this manual you will need to be conversant with the
information found in the general documentation for the PSS-range (System
Manual, Installation Manual for the modular/compact PSS, PSS WIN-PRO
Programming Manual).
In particular you should refer to the following documents from the System
Manual:
• Safety Manual
• FS System Description
• Error List
To fully understand the bus-specific requirements and correlations for
SafetyBUS p applications you will need some knowledge of the design and
management of SafetyBUS p.
Knowledge of the safety regulations for the particular area of application is
assumed.
This installation manual is intended for instruction and should be retained
for future reference.
1-1Modular Block System: Burner Management
Introduction
MBS Modular Block System
Safety-related areas can be equipped with a multitude of safety devices
such as E-STOPs, safety gates, light barriers etc. Safety devices are
required in various quantities and combinations, depending on the object
requiring protection. The Pilz MBS Modular Block System was developed
to drive the various safety devices and to carry out process engineering
functions, The MBS is designed to help users save time and money.
The MBS consists of individual standard function blocks (SBs), which are
geared specifically towards the relevant safety device or process
engineering function. It allows standard function blocks to be used in any
combination. The standard function blocks can be combined in any
sequence (max. 600).
Standard function blocks are encoded by an authorised body so that they
cannot be modified. If encoded standard function blocks are used within a
user program, program testing may be restricted to the new parts of the
program, considerably reducing the test time.
1-2
Modular Block System: Burner Management
Categories / requirement classes
EN 954-1 divides safety devices into categories.
All standard function blocks are designed for the highest category
permitted for the safety device to be monitored. If safety devices with lower
categories are to be monitored, input parameters may be assigned
identical inputs (further information can be found in the description for the
relevant standard function block).
In process engineering, safety requirements must conform to DIN V 19250
(Fundamental Safety Aspects to be Considered for Measurement and
Control Equipment).
Requirement classes in accordance with DIN V 19250 may be referred to
the categories as per EN 954-1. The Appendix contains a table showing
the assignment of category and requirement class.
1-3Modular Block System: Burner Management
Introduction
Overview of manual
1 Introduction
The chapter you are reading provides an introduction to the Modular
Block System (MBS). It is designed to familiarise you with the
contents, structure and specific order of this manual and also contains
terminology definitions.
2 Overview
This chapter provides information on the most important features of
the software package and provides a brief overview of the application
range.
3 Safety
This chapter must be read as it contains important information on
safety regulations.
4 Intended Use
This chapter must be read as it contains information on intended use.
5 MBS Basics
This chapter explains the basic functions and safety requirements of
the MBS.
6 Standard Function Blocks
This chapter explains the function of the package’s standard function
blocks.
7 Link Blocks
This chapter is designed to help you link the standard function blocks
into your project and to commission the safety functions.
8 Examples
This chapter is designed to give an overview of how the standard
function blocks may be applied and contains typical application
examples.
9 Appendix
The Appendix contains a table that explains the relationship between
categories and requirement classes, plus a list that documents the
current version status of the standard function blocks.
1-4
Modular Block System: Burner Management
Definition of symbols
Information in this manual that is of particular importance can be identified
as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation that
poses an immediate threat of serious injury and death and indicates
preventive measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation that
could lead to serious injury and death and indicates preventive
measures that can be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor injury plus
material damage, and also provides information on preventive measures
that can be taken.
NOTICE
This describes a situation in which the unit(s) could be damaged and also
provides information on preventive measures that can be taken.
INFORMATION
This gives advice on applications and provides information on special
features, as well as highlighting areas within the text that are of particular
importance.
1-5Modular Block System: Burner Management
Introduction
Terminology
• The term “input” is frequently abbreviated to “I” (e.g. I-Parameter).
• The term “output” is frequently abbreviated to “O” (e.g. O-Parameter).
• The term “PSS” is always used when the description is valid for all
applicable PSS programmable safety systems. If the description only
relates to a specific PSS series, the specific name for that series will be
used (e.g. PSS 3000 or PSS SB 3056).
• In this manual, the Pilz system software “PSS WIN-PRO” is referred to as
the “programming device” or “PG”.
1-6
Modular Block System: Burner Management
Overview
Software package
The “MBS Burner Management” software package is part of the Pilz MBS
Modular Block System.
Standard function blocks in the “MBS Burner Management” software
package are used in the failsafe section of a PSS-range programmable
safety system.
The software package complies with the relevant standards and directives
for burners, steam boilers and thermoprocessing equipment.
The software package contains all the blocks necessary for burner control.
Operation
The individual standard function blocks perform individual functions such
as:
• Sequence control
• Flame monitoring
• Tightness control
• etc.
With these blocks the user can put the burner cycle together individually.
Details can be found in Chapter 6 of this manual, “Standard Function
Blocks”.
2-1Modular Block System: Burner Management
Overview
Range
The software package consists of:
• The files for the software package on CD and
• An operating manual:
PSS Standard Function Blocks, MBS Burner Management.
The software package on the CD contains the following blocks:
• SB149 STEP
Sequence control
(approved safety block)
• SB150 FLAME_M
Flame monitoring
(approved safety block)
• SB151 BridgedS
Transient suppression
(approved safety block)
• SB152 BR_START
Burner: start and operator elements
(approved safety block)
• SB153 FLAP
Control and position monitoring of flaps
(approved safety block)
• SB154 VALVE
Control and position monitoring of valves
(approved safety block)
• SB155 PREPURGE
Pre-purge
(approved safety block)
• SB156 TIGHT_C
Tightness control
(approved safety block)
• SB157 IGNI_TRY
Several ignition attempts
(approved safety block)
2-2
Modular Block System: Burner Management
• SB158 IGNITION
Ignition
(approved safety block)
• SB159 RUN
Run
(approved safety block)
• SB160 BLOWER
Blower
(approved safety block)
• SB071 INIT_MBS
Initialisation of administration data blocks (DB015/DB016/DB017)
(approved safety block)
• SB255 System block
SB255 is explained in the PSS System Description.
INFORMATION
Please refer to the Appendix, section entitled “Standard function blocks:
current versions”.
2-3Modular Block System: Burner Management
Overview
Notes
2-4
Modular Block System: Burner Management
Safety
Safety guidelines
These safety guidelines are an important part of this manual.
Failure to keep to these guidelines will render all warranty and liability
claims invalid:
• All health and safety / accident prevention regulations for the particular
area of application must be observed.
• Before using one or more of the standard function blocks in this software
package, it is necessary to perform a safety assessment in accordance
with the Machinery Directive.
Use of qualified personnel
The safety system may only be assembled, installed, programmed,
commissioned, operated, maintained and decomissioned by qualified
personnel. Qualified personnel are people who, because they are:
• Qualified electrical engineers and/or
• Have received training from qualified electrical engineers
are suitably experienced to operate devices, systems, plant and machinery
in accordance with the general standards and guidelines for safety
technology.
Warranty and liability
All claims to warranty and liability will be rendered invalid if:
• Standard function blocks are used contrary to the purpose for which they
were intended
• Damage can be attributed to not having followed the guidelines in the
manual
• Operating personnel are not suitably qualified.
3-1Modular Block System: Burner Management
Safety
Application guidelines
• The instructions given in the “Safety Manual” and in the “Installation
Manual” must be followed.
• Please read the information in Chapter 4 concerning the proper
application of these blocks.
• The use of Pilz SBs does not detract from the fact that it is the
responsibility of the user to design appropriate safety systems for plant,
machinery and software.
• It is your responsibility to determine your application requirements by
carrying out a detailed risk analysis. This should take into account relevant standards and directives, etc.
WARNING!
Please note: To achieve the corresponding category or requirement class,
the whole system including all safety-related components (parts, devices,
user program etc.) must be included in the assessment. For this reason,
Pilz cannot accept liability for the correct classification into a category or
requirement class.
3-2
Modular Block System: Burner Management
Standards
To use the SBs correctly you will need to have a good knowledge of the
relevant standards and directives. The following gives an overview of the
most important standards:
• Safety of machinery – Basic terminology
• Electrical equipment
• Safety of machinery; safety-related parts of
control systems
• Fundamental safety aspects to be considered
for measurement and control equipment
• Electrical equipment for furnaces
• Automatic gas burner control systems for gas
burners and gas burning appliances with or
without fans
• Monobloc oil burners
• Forced draught oil burners
• Automatic forced draught burners for gaseous
fuels
• Valve proving systems for automatic shut-off
valves for gas burners and gas appliances
• Electrical equipment for furnaces
EN 292-1:1991-11 and
EN 292-2:1995-06
EN 60 204-1:1998-11
EN 954-1:1997-03
DIN V 19250:1994-05
EN 50 156-1:2004
EN 298:2003
EN 230:1990
EN 267:1999
EN 676:2003
EN 1643:2000
VDE 0116/
EN 50156:2004
• Industrial thermoprocessing equipment
• Water-tube boilers and auxiliary installations
• Shell boilers
• Directive for appliances burning gaseous fuels
• Pressure equipment directive
• Oil firing systems for boilers
• Gas firing systems for boilers
EN 746-2:1997
EN 12952-8:2003
EN 12953-7:2002
90/396/EEC
97/23/EC
TRD 411:1997
TRD 412:1998
Please note this is not an exhaustive list of safety standards and directives.
3-3Modular Block System: Burner Management
Safety
Fault detection
The detection of errors and defects is an important function of the PSS, in
addition to pure control tasks.
Further information on the fault detection concept can be found in the PSS
“System Description”.
WARNING!
It is particularly important to detect open circuits and shorts within the
safety circuits (e.g. two-hand control devices, E-STOP etc.).
It is the responsibility of the user to select and apply an appropriate fault
detection system.
Feasibility test
Fault prevention
Redundant input devices for safety functions must undergo a feasibility test
within the user program.
The plant must be stopped immediately if a feasibility error occurs. Similar
tests will also be required for other input devices.
If safety valves have feedback contacts, these must be evaluated
accordingly.
Not all potential faults can be detected and managed. Such faults must be
excluded by suitable wiring methods.
Additional information on how to exclude potential errors can be found in
the BIA Handbook (BG Institute for Occupational Safety, St Augustin) or in
the directive VDI 2854:1991-06 (safety requirements on automated
manufacturing systems).
3-4
Modular Block System: Burner Management
Intended Use
Application
The software package “MBS Burner Management” is designed for
use within the failsafe section of the PSS-range of programmable safety
systems. With this MBS package it is possible to control and monitor
various status conditions on furnaces.
INFORMATION
• Use of standard function blocks outside the specifications described here
will be deemed as improper use.
• MBS blocks must be run through as part of each cycle.
Please refer also to the table showing the required connections for the
standard function blocks, at the end of Chapter 6.
INFORMATION
Always use the current version of the standard function block.
Please ensure you refer to the Appendix, sections entitled “Standard
function blocks: current versions” and “Changes to the standard function
blocks”.
System software
The software package “MBS Burner Management” can be used with the
PSS WIN-PRO system software.
Further information is available in the PSS WIN-PRO “Progamming Manual”.
4-1Modular Block System: Burner Management
Intended Use
Intended use of the standard function blocks
SB149: Sequence control
SB149 is a standard function block designed to control operating cycles.
For this reason, several SB149 blocks can be arranged together to form a
sequence. Each SB149 in this sequence waits for the ready signal from the
previous step and for the step enabling conditions to be met, before it
becomes active.
A PSS can monitor and control several work cycles in which each cycle is
assigned a separate sequence.
NOTICE
During a sequence only one SB may be active. This requirement is only
met if output parameter
parameter
accordingly.
RDY
on the next step. Make sure the parameters are assigned
NEXT
from the current step is connected to input
SB150: Flame monitoring
SB150 is a standard function block for monitoring flames from the moment
the burner starts until the moment the burner stops. The block checks
whether the flame is present or absent, depending on the operating status.
SB151: Transient suppression
SB151 is a standard function block for monitoring a N/C contact, e.g. on a
pressure monitor. The N/C contact must be wired with a test pulse.
4-2
Modular Block System: Burner Management
SB152: Burner: start and operator elements
SB152 is used to control the burner start and monitor the burner.
Use SB152 to:
• Carry out a delayed start after the controller has started
• Carry out a restart after a controlled shutdown
• Evaluate the reset, start and stop button
• Monitor the air pressure monitor
• Monitor the flames (pilot and main flame)
• Monitor the global messages from the error, monitor and safety
sequences and to carry out a controlled shutdown or safety lockout.
If the safety sequence is interrupted, the error must always be rectified,
followed by a manual reset via the reset button (
(
STRT)
. The block enable
ENBL
sequence is no longer interrupted. .
NOTICE
Error reaction is the sole responsibility of the user. All safety-related
aspects must be taken into account when selecting the elements for the
error and safety sequences!
RSET)
and start button
will only be issued when the safety
SB153: Control and position monitoring of flaps
SB153 monitors the status of a flap. It opens and closes the flap after the
corresponding input prompt, monitors the direction of a positional change
and checks the reaction time.
The contact bounce time lasts for one cycle, if a change in position occurs.
4-3Modular Block System: Burner Management
Intended Use
SB154: Control and position monitoring of valves
SB154 monitors the status of a valve. It changes the valves' position after
the corresponding input prompt, monitors the direction of a positional
change and checks the reaction time.
The contact bounce time lasts for one cycle, if a change in position occurs.
SB155: Pre-purge
SB155 monitors the limit switch for the maximum position of the air
damper or the maximum air flow during the pre-purge time.
If the limit switch isn’t activated by the air damper during the pre-purge
time, or if the maximum air flow for pre-purge is not achieved, SB155
resets its enable.
SB156: Tightness control
SB156 checks the tightness (seal) of the safety valves, the main valves
and, if present, the exhaust valves.
Tightness monitoring must be called up separately. If an error occurs, the
enable is reset and a shutdown occurs.
SB157: Several ignition attempts
SB157 counts the number of ignition attempts. After a failed ignition, a
signal is issued for another attempt, after which the step sequence can
immediately start the initial ignition step.
SB157 also monitors the time between the ignition attempts and the
establishment of a flame.
4-4
Modular Block System: Burner Management
SB158: Ignition
SB159: Run
SB158 controls the ignition and monitors the process. The ignition steps
must be called up individually. If a fault occurs, the enable is reset and a
shutdown occurs.
To ensure a fault-free ignition process, the safety valve must not be driven
from SB158 and another safety block at the same time.
SB159 is used to set up the burner. These set-up steps must be called up
individually. If an error occurs, the enable is reset and a shutdown occurs.
Following a fault-free start-up SB159 issues a control enable.
To ensure a fault-free start-up process, the main valve must not be driven
from SB159 and another safety block at the same time.
SB160: Blower
SB160 is used to control a blower/fan on force draught burners.
The blower is switched on by pressing a button on the input parameter
STRT
the input parameter
NEXT
on SB160. The blower is switched off either by pressing a button on
STOP
on SB160 or by setting the input parameter
via the sequence block “Blower overrun time”.
When controlling fans the rising edge of the signals on the input
parameters has priority.
4-5Modular Block System: Burner Management
Intended Use
Notes
4-6
Modular Block System: Burner Management
Loading...