IEC 62386-220:2019

IEC 62386-220 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –
Part 220: Particular requirements for control gear – Centrally supplied
emergency operation (device type 19)

Interface d’éclairage adressable numérique –
Partie 220: Exigences particulières pour les appareillages de commande –
Fonctionnement de secours alimenté par source centrale (dispositifs de type 19)

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IEC 62386-220 ®
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Digital addressable lighting interface –

Part 220: Particular requirements for control gear – Centrally supplied

emergency operation (device type 19)

Interface d’éclairage adressable numérique –

Partie 220: Exigences particulières pour les appareillages de commande –

Fonctionnement de secours alimenté par source centrale (dispositifs de type 19)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.50; 29.140.99 ISBN 78-2-8322-6459-1

– 2 – IEC 62386-220:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General . 9
4.1 General . 9
4.2 Version number . 10
4.3 External power supply of bus units . 10
4.4 Power interruption at bus units . 10
4.4.1 General . 10
4.4.2 Power interruptions of external power supply . 10
5 Electrical specification . 10
5.1 General . 10
5.2 Marking of the supply interface . 10
6 Interface power supply . 11
7 Transmission protocol structure . 11
8 Timing . 11
9 Method of operation . 11
9.1 General . 11
9.2 Purpose of control gear in central emergency system . 11
9.3 Emergency operation light output and emergency level . 11
9.4 Detection of supply type . 11
9.5 Emergency condition. 11
9.6 System failure versus emergency system failure . 12
9.7 Emergency mode . 12
9.7.1 Activating emergency mode . 12
9.7.2 Light output transition time in emergency mode . 13
9.7.3 Response during emergency mode . 13
9.7.4 Leaving emergency mode . 13
9.7.5 Protection functionalities in emergency mode . 14
9.7.6 Configuring emergency mode variables . 14
9.7.7 Emergency mode and operating modes . 15
9.8 Emergency physical maximum level . 15
9.9 Testing of emergency level . 15
9.10 Emergency status . 15
9.11 Data integrity and consistency . 16
9.11.1 General . 16
9.11.2 Finite locking . 16
9.11.3 Infinite locking . 17
9.12 Restricting device type support . 17
10 Declaration of variables . 17
11 Definition of commands . 18
11.1 General . 18
11.2 Overview sheets . 18
11.3 Queries . 20

11.3.1 General . 20
11.3.2 QUERY ACTUAL LEVEL. 20
11.4 Application extended commands . 20
11.4.1 General . 20
11.4.2 Configuration instructions . 20
11.4.3 Level instructions . 21
11.4.4 Queries. 21
11.5 Special commands . 22
11.5.1 General . 22
11.5.2 ENABLE DEVICE TYPE (data) . 22
Annex A (informative) Recommendations and annotations for emergency luminaires

and emergency lighting systems . 23
A.1 Recommendations regarding emergency luminaires . 23
A.2 Recommendations regarding emergency lighting systems . 23
A.3 Switchover timing for emergency lighting systems . 23
Bibliography . 25

Figure 1 – IEC 62386 graphical overview . 6
Figure 2 – Example of an external power interruption. 10
Figure A.1 – Overall switching time in emergency lighting system according to EN
50171 changeover mode . 24
Figure A.2 – Overall switching time in centrally supplied emergency lighting system
with emergency condition being bus power down . 24

Table 1 – Emergency condition and emergency mode . 12
Table 2 – Response on interruptions of bus power . 12
Table 3 – Response when leaving emergency mode . 14
Table 4 – Emergency status . 15
Table 5 – Declaration of additional variables . 17
Table 6 – Application extended commands for this device type . 19

– 4 – IEC 62386-220:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 220: Particular requirements for control gear –
Centrally supplied emergency operation (device type 19)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62386-220 has been prepared by IEC technical committee 34:
Lamps and related equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
34/577/FDIS 34/591/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This Part 220 of IEC 62386 is intended to be used in conjunction with:
• Part 101, which contains general requirements for system components;
• Part 102, which contains general requirements for control gear.
A list of all parts in the IEC 62386 series, published under the general title Digital addressable
lighting interface, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 62386-220:2019 © IEC 2019
INTRODUCTION
IEC 62386 contains several parts, referred to as series. The 1xx series includes the basic
specifications. Part 101 contains general requirements for system components, Part 102
extends this information with general requirements for control gear and Part 103 extends it
further with general requirements for control devices.
The 2xx parts extend the general requirements for control gear with lamp specific extensions
(mainly for backward compatibility with Edition 1 of IEC 62386) and with control gear specific
features.
The 3xx parts extend the general requirements for control devices with input device specific
extensions describing the instance types as well as some common features that can be
combined with multiple instance types.
This first edition of IEC 62386-220 is intended to be used in conjunction with IEC 62386-
101:2014, IEC 62386-101:2014/AMD1:2018, IEC 62386-102:2014 and
IEC 62386-102:2014/AMD1:2018 and with the various parts that make up the IEC 62386-2xx
series for control gear. The division into separately published parts provides for ease of future
amendments and revisions. Additional requirements will be added as and when a need for
them is recognised.
The setup of the standards is graphically represented in Figure 1 below.
2xx 2xx 2xx 2xx 2xx 3xx 3xx 3xx 3xx 3xx
102 General requirements - 103 General requirements -
Control gear Control devices
101 General requirements -
System components
IEC
Figure 1 – IEC 62386 graphical overview
This document, and the other parts that make up the IEC 62386-200 series, in referring to any
of the clauses of IEC 62386-1XX, specifies the extent to which such a clause is applicable;
the parts also include additional requirements, as necessary.
Where the requirements of any of the clauses of IEC 62386-1XX are referred to in this
document by the sentence "The requirements of IEC 62386-1XX, Clause "n" apply", this
sentence is to be interpreted as meaning that all requirements of the clause in question of
Part 1XX apply, except any which are clearly inapplicable.
The standardization of the control interface for control gear is intended to achieve compatible
co-existence between electronic control gear and lighting control devices, below the level of
building management systems. This document describes a method of implementing control
gear.
All numbers used in this document are decimal numbers unless otherwise noted.Hexadecimal
numbers are given in the format 0xVV, where VV is the value. Binary numbers are given in
the format XXXXXXXXb or in the format XXXX XXXX, where X is 0 or 1, "x" in binary numbers
means "don't care".
The following typographic expressions are used:
Variables: variableName or variableName[3:0], giving only bits 3 to 0 of variableName
Range of values: [lowest, highest]
Command: “COMMAND NAME”
– 8 – IEC 62386-220:2019 © IEC 2019
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 220: Particular requirements for control gear –
Centrally supplied emergency operation (device type 19)

1 Scope
This part of IEC 62386 specifies a bus system for control by digital signals of electronic
lighting equipment which is in line with the requirements of IEC 61347 (all parts), with the
addition of DC supplies.
This document is applicable to control gear supporting centrally supplied emergency operation
as described in EN 50171.
This document does not apply to self-contained emergency lighting control gear. These types
of control gear are specified in IEC 62386-202.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 62386-101:2014, Digital addressable lighting interface – Part 101: General requirements
– System components
IEC 62386-101:2014/AMD1:2018
IEC 62386-102:2014, Digital addressable lighting interface – Part 102: General requirements
– Control devices
IEC 62386-102:2014/AMD1:2018
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62386-101 and
IEC 62386-102 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
emergency level
configurable arc power level for emergency operation
3.2
emergency condition
defined change of state of the supply type or bus power to provoke the emergency operation
of control gear
Note 1 to entry: This purely focuses on control gear interfaces. It is not to be confused with the emergency
condition signalling occurrence of an emergency event to a central emergency power system.
Note 2 to entry: Change of state is typically controlled by the central power supply system.
3.3
emergency mode
emergency operation, due to the emergency condition being detected
3.4
emergency physical maximum level
emergency level corresponding to the maximum physical light output the control gear can
operate at when in emergency mode
Note 1 to entry: The light level in normal mode is not affected by this physical maximum level.
3.5
emergency condition detection time
time starting with the external emergency condition being present and ending with the control
gear having detected the emergency condition
3.6
emergency switch and ignition time
time starting with control gear having detected the emergency condition and ending with
lamp(s) emitting light
3.7
emergency system failure
ESF
type of emergency condition in which bus power is down
Note 1 to entry: The emergency system failure replaces the system failure where applicable.
Note 2 to entry: This note only applies to the French language.
3.8
emergency transition time
control gear emergency condition detection time plus emergency switch and ignition time
3.9
normal mode
standard operation of a control gear without a detected emergency condition
3.10
supply type
AC supply or DC supply
Note 1 to entry: Supply type for normal and emergency mode may or may not be different.
Note 2 to entry: DC supply is typically realized as continuous DC voltage or pulsed DC voltage (e.g. rectified AC).
4 General
4.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 4
apply, with the restrictions, changes and additions identified below.

– 10 – IEC 62386-220:2019 © IEC 2019
4.2 Version number
In IEC 62386-102:2014, 4.2, “102” shall be replaced by “220”, “version number” shall be
replaced by “extended version number” and the current version number shall be replaced by
"extendedVersionNumber".
4.3 External power supply of bus units
A control gear according to this document shall not be bus powered.
4.4 Power interruption at bus units
4.4.1 General
The requirements of IEC 62386-101:2014 and IEC 62386-101:2014/AMD1:2018, 4.11 apply,
with the following changes and additions.
4.4.2 Power interruptions of external power supply
For control gear with “deviceType” = 19, interruptions of external power supply shall be
defined as the period of time beginning with failure of normal supply and ending with fully
re-established normal supply. This definition applies regardless whether there has been any
emergency supply detected in the meantime. Figure 2 shows an example of an external power
interruption.
Normal
Normal
supply
Emergency supply supply
External power interruption
IEC
Figure 2 – Example of an external power interruption
5 Electrical specification
5.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 5
apply, with the following additions.
5.2 Marking of the supply interface
If the detection of DC supply is polarity sensitive, the external power supply terminals shall be
marked with "+" and "−" to indicate the polarity. If colour coding is used, the colours
representing the "+" and "−" shall be given on the label.

6 Interface power supply
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 6,
apply.
7 Transmission protocol structure
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 7,
apply.
8 Timing
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 8,
apply.
9 Method of operation
9.1 General
The requirements of IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, Clause 9
apply, with the following restrictions, changes and additions.
9.2 Purpose of control gear in central emergency system
Control gear according to this document are only one component within a centralized
emergency power system, and therefore do only partly contribute to the overall central
emergency system functionality. Consequently this document focuses solely on functionality
realized within the control gear. See Annex A for more information.
NOTE This “part contribution” differs fundamentally from self-contained emergency control gear, where the whole
emergency lighting functionality is realized within the control gear.
9.3 Emergency operation light output and emergency level
“emergencyLevel” shall comply with the dimming curve given in IEC 62386-102:2014 and
IEC 62386-102:2014/AMD1:2018, 9.3 whereas “actualLevel” shall be replaced by
“emergencyLevel”. The light output at any percentage when ”emergencyMode“ is TRUE shall be
the same as at the corresponding percentage in normal mode.
NOTE The default dimming curve is given in IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, 9.3.
9.4 Detection of supply type
The control gear shall provide means for detecting AC and DC supply.
9.5 Emergency condition
Whether to operate in emergency mode or normal mode shall be derived from:
• supply type, or
• bus power down.
The “emergencyCondition” variable determines which condition is used to set or clear the
emergency mode. See Table 1.
– 12 – IEC 62386-220:2019 © IEC 2019
If “emergencyCondition” is SUPPLY, the mode shall be determined by the supply type. If the
supply type is DC, “emergencyMode” shall be set to TRUE, otherwise, “emergencyMode” shall
be set to FALSE. Changes in bus power shall be handled according to 9.6.
If “emergencyCondition” is BUS, the mode shall be determined by bus power down. If bus
power down is detected, “emergencyMode” shall be set to TRUE, otherwise “emergencyMode”
shall be set to FALSE. The supply type has no impact on “emergencyMode”.
NOTE emergencyCondition” being BUS is typically used in the case where the supply type does not change when
changing from normal to an emergency situation.
Table 1 – Emergency condition and emergency mode
“emergencyCondition” Supply type Bus power Resulting
“emergencyMode”
SUPPLY DC supply Don’t care TRUE
AC supply Don’t care FALSE
BUS Don’t care Bus power down TRUE
System failure
Don’t care Normal FALSE
9.6 System failure versus emergency system failure
The response to interruptions of bus power shall differ depending on the selected emergency
source. In case of bus power interruptions, behaviour according to Table 2 shall apply:
Table 2 – Response on interruptions of bus power
“emergencyCondition” “emergencyMode” Bus power Resulting response
SUPPLY FALSE Short interruption response according to
of bus power IEC 62386-101:2014, 4.11.4
Bus power down Bus power down response
(according to IEC 62386-101:2014 and
IEC 62386-101:2014/AMD1:2018, 4.11)
System failure System failure response
(according to IEC 62386-101:2014 and
IEC 62386-101:2014/AMD1:2018, 4.11 and
IEC 62386-102:2014 and IEC 62386-
102:2014/AMD1:2018, 9.12)
TRUE Don’t care No reaction.
See 9.7.2
BUS Not applicable Short interruption Response according to
of bus power IEC 62386-101:2014, 4.11.4
Bus power down Response as described in 9.5
System failure
9.7 Emergency mode
9.7.1 Activating emergency mode
If “emergencyMode” is changed from FALSE to TRUE, the light output shall be calculated
according to “emergencyLevel” and shall be adjusted as quickly as possible, at least complying
with 9.7.2.
9.7.2 Light output transition time in emergency mode
The function of light output over time starting when the emergency condition occurs until the
physical maximum emergency light output has been reached shall be documented in the
product manual. The description shall at least contain the emergency transition time and the
light output over time function (e.g. as a graph) starting at the end of the emergency transition
time ending with the point in time when at least 90 % of the physical maximum emergency
light output is reached. The information provided shall comprise the worst case timing and the
test shall verify that the actual timing is faster or equal to the data given.
NOTE 1 Worst case timing is typically applicable in the case where “emergencyLevel” equals
“emergencyPhMaxLevel” and the rated emergency supply voltage is the lowest.
NOTE 2 Requirements on light output over time differ depending on application and various national regulations.
For example, some applications require 50 % of the requested light output after 5 s, 100 % of the requested light
output after 60 s according to given emergency standards (See bibliography).
9.7.3 Response during emergency mode
As long as “emergencyMode” is TRUE the following holds:
• The light output shall only depend on “emergencyLevel”. As this document is an emergency
standard this applies even if other parts of the IEC 62386 series require a different light
output.
• The control gear shall refuse execution of all instructions, all special commands and all
application extended instructions except the following (see IEC 62386-102:2014 and
IEC 62386-102:2014/AMD1:2018, 9.7):
– “DTR0(data)”, “DTR1(data)”, “DTR2(data)”
– “READ MEMORY LOCATION (DTR1, DTR0)”
– “ENABLE DEVICE TYPE (data)”
NOTE 1 The above requirements imply that, as long as “emergencyMode” is TRUE, only queries are processed.
This also applies for all parts of the IEC 62386-2xx series.
NOTE 2 “emergencyCondition” being BUS, implies that no communication is possible on the bus as long as
“emergencyMode” is TRUE.
• Updating of control gear internal variables shall continue where applicable.
NOTE 3 Control gear status information is an example of variables to be updated.
9.7.4 Leaving emergency mode
If “emergencyMode” is changed from TRUE to FALSE the response according to Table 3 shall
apply.
– 14 – IEC 62386-220:2019 © IEC 2019
Table 3 – Response when leaving emergency mode
“emergencyCondition” Resulting response
SUPPLY Determine external power interruption time as described in 4.4.2.
• In case of short power interruption: apply normal short power interruptions of
external power supply response.
• In case of external power cycle: The control gear shall switch to normal operation or
standby according to IEC 62386-102:2014 and IEC 62386-102:2014 /AMD1:2018,
9.2. It shall calculate “targetLevel” on the basis of “powerOnLevel”. If
“powerOnLevel” equals MASK, “targetLevel” shall be set to “lastLightLevel”.
“actualLevel” shall be set to “targetLevel” immediately and the light output shall be
adjusted as quickly as possible. Additionally “powerCycleSeen” shall be set to
TRUE.
BUS The control gear shall switch to normal operation or standby according to IEC 62386-
102:2014 and IEC 62386-102:2014 /AMD1:2018, 9.2. It shall calculate the “targetLevel”
on the basis of “powerOnLevel”. If “powerOnLevel” equals MASK, “targetLevel” shall be
set to “lastLightLevel”. “actualLevel” shall be set to “targetLevel” immediately and the
light output shall be adjusted as quickly as possible.

NOTE Table 3 is designed to allow for a predictable behaviour upon restoration of normal mode.
9.7.5 Protection functionalities in emergency mode
Practicability of protection functionalities while “emergencyMode” is TRUE shall be considered
by the control gear manufacturer, as they might interfere with desired emergency operation.
For example, reducing the light output to preserve the lifetime of the light source might not be
suitable. The manufacturer shall decide whether a certain type of protection is suitable while
“emergencyMode” is TRUE.
Every implemented protection functionality, that is or becomes enabled while "emergencyMode"
is TRUE shall be indicated via status information (see IEC 62386-102:2014 and IEC 62386-
102:2014/AMD1:2018, 9.16) where applicable.
It is recommended that any protection functionalities that are not directly safety related and
which might interfere with the desired emergency operation when applied, are disabled as
long as “emergencyMode” is TRUE.
9.7.6 Configuring emergency mode variables
“emergencyCondition” shall be set using “SET EMERGENCY CONDITION: SUPPLY” and
“SET EMERGENCY CONDITION: BUS” and can be queried using
“QUERY EMERGENCY CONDITION: SUPPLY” and
“QUERY EMERGENCY CONDITION: BUS”.
NOTE 1 The queries have been separated to be able to quickly check if there are any control gear in a particular
configuration.
“emergencyLevel” can be set and queried with “SET EMERGENCY LEVEL (DTR0)”
and ”QUERY EMERGENCY LEVEL” respectively. The range of validity is restricted by PHM
and “emergencyPhMaxLevel”.
The status of the emergency mode can be queried with “QUERY EMERGENCY STATUS”.
NOTE 2 According to 9.7.3 a change of “emergencyCondition” or “emergencyLevel” is not possible as long as
“emergencyMode” is TRUE.
NOTE 3 According to 9.11 a change of “emergencyCondition” or “emergencyLevel” is not possible as long as
“emergencyParameterLocked” is TRUE.

9.7.7 Emergency mode and operating modes
The response of a control gear may differ from this document in whole or in part in case of
"operatingMode" being different from 0x00.
In case that factory default "operatingMode" is within range [0x80, 0xFF], it is strongly
recommended that this operating mode meets all of the requirements in this document.
NOTE 1 According to 9.7.3 a change of “operatingMode” is not possible as long as “emergencyMode” is TRUE.
NOTE 2 According to 9.11 a change of “operatingMode” is not possible as long as “emergencyParameterLocked” is
TRUE.
9.8 Emergency physical maximum level
Not all control gear can provide the maximum light output in emergency operation during all
circumstances (e.g. due to required operation at higher ambient temperatures in emergency
mode). Therefore an emergency physical maximum level shall be introduced.
The “emergencyPhMaxLevel” shall restrict the effectively usable range of “emergencyLevel”,
where PHM ≤ “emergencyLevel” ≤ “emergencyPhMaxLevel”.
“emergencyPhMaxLevel” can be queried with “QUERY EMERGENCY PHYSICAL MAXIMUM”.
9.9 Testing of emergency level
To ease testing of the currently set “emergencyLevel” it can be recalled by
“TEST EMERGENCY LEVEL”.
“TEST EMERGENCY LEVEL“ is a level instruction without fade according to
IEC 62386-102:2014 and IEC 62386-102:2014/AMD1:2018, 9.7.2.
NOTE 1 This paragraph implies that “TEST EMERGENCY LEVEL” is only executed while “emergencyMode” is
FALSE.
NOTE 2 By switching off all normal non-emergency control gear and then sending “TEST EMERGENCY LEVEL”
to the emergency control gear, the emergency lighting levels can be checked.
9.10 Emergency status
Each control gear shall expose its status as a combination of device properties as given in
Table 4.
Table 4 – Emergency status
Bit Description Value See
0 “emergencyMode” is TRUE? 1 = “YES” 9.7.1, 9.7.4
1 “emergencyCondition” 1 = “SUPPLY” 9.5
0 = “BUS”
2 “emergencyParameterLocked” 1 = “YES” 9.11
is TRUE?
3 “infiniteLock” 1 = “YES” 9.11
is TRUE?
4 Reserved 0
5 Reserved 0
6 Reserved 0
7 Reserved 0
– 16 – IEC 62386-220:2019 © IEC 2019
The emergency status can be queried using “QUERY EMERGENCY STATUS”. The bits shall
reflect the actual situation without delay unless explicitly stated otherwise.
9.11 Data integrity and consistency
9.11.1 General
To ensure data integrity, there shall be a possibility to protect emergency operation related
data within the control gear against intended and unintended changes via the bus. The
following control gear variables shall be affected by this locking mechanism:
• “emergencyLevel”
• “emergencyCondition”
Additionally, the following control gear variables according to IEC62386-102:2014 and
IEC 62386-102:2014/AMD1:2018, Clause 10 shall be affected:
• “operatingMode”
• “shortAddress”
• “powerOnLevel”
• “systemFailureLevel”
NOTE Locking of variables of IEC 62386-102 can interfere with application controllers not being capable of
identifying emergency control gear. Considering this is beneficial when designing the emergency system.
The locking status is indicated by “emergencyParameterLocked” and can be queried with
“QUERY EMERGENCY STATUS”. Setting “emergencyParameterLocked” to TRUE shall ensure
that actual values of control gear variables mentioned in the first paragraph of 9.11.1 shall be
write protected and not be changed. This applies upon occurrence of:
• execution of corresponding configuration commands intended to change the value of
variables;
EXAMPLE PROGRAM SHORT ADDRESS (data).
• execution of commands ‘RESET” and “RESET MEMORY BANK (DTR0)”;
• external power cycle.
Every time “emergencyParameterLocked” is set to TRUE, the control gear shall physically store
all variables identified in Table 5 as non-volatile memory (NVM).
Setting “emergencyParameterLocked” to FALSE shall cancel the write protect state of variables
mentioned in the first paragraph of 9.11.1 immediately without changing their values.
Variables shall be again freely configurable within their specified range of validity.
The (un-)locking of the above variables shall be achieved with SET EMERGENCY
PARAMETER LOCK (DTR0, DTR1, DTR2), whereas “DTR1” and “DTR2” serve as arbitrary
lock code and “DTR0” as (un-)lock selector.
There are two different types of locking, called finite and infinite locking. The difference is that
finite locking can be unlocked in a standardized way via the bus, whereas infinite locking
cannot.
9.11.2 Finite locking
Finite locking shall provide protection against (un-)intended changes of emergency data whilst
at the same time allowing unlocking the data again for a new configuration at a later time. To
achieve proper unlocking, the appropriate “emergencyLockCode” shall be known to the
configuring control device.
9.11.3 Infinite locking
Infinite locking provides a possibility to secure emergency operation related data in such a
way that they cannot be changed in a standardized way via the bus anymore. This is to
ensure a higher level of system integrity, as remote changes via the bus are not possible.
There may be a manufacturer specific way to unlock infinitely locked control gear which shall
be described in the product manual.
EXAMPLE Separate hardwired switch.
Infinite locking can only be activated if finite locking has been set beforehand.
The infinite locking status is indicated by “infiniteLock” and can be queried with
“QUERY EMERGENCY STATUS”.
9.12 Restricting device type support
A control gear supporting device type 19 according to this document, shall not, in addition,
su
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