SIST EN 62386-204:2009

Digital addressable lighting interface - Part 204: Particular requirements for control gears; low voltage halogen lamps (device type 3) (IEC 62386-204:2009)

This International Standard specifies a protocol and methods of test for the control by digital signals of electronic control gear for use on a.c. or d.c. supplies, associated with low voltage halogen lamps. NOTE Tests in this standard are type.

Digital adressierbare Schnittstelle für die Beleuchtung - Teil 204: Besondere Anforderungen an Betriebsgeräte - Niedervolt-Halogenlampen (Gerätetyp 3) (IEC 62386-204:2009)

Interface d'éclairage adressable numérique - Partie 204: Exigences particulières pour les appareillages; lampes à halogène à basse tension (dispositifs de type 3) (CEI 62386-204:2009)

La CEI 62386-204:2009 spécifie un protocole et des méthodes d'essai pour la commande par des signaux numériques des appareillages électroniques destinés à être utilisés dans les alimentations alternatives ou continues, associés aux lampes à halogène à basse tension. La présente partie 204 est destinée à être utilisée conjointement avec la CEI 62386-101 et la CEI 62386-102, qui contiennent les exigences générales pour le type de produit applicable (appareillage ou dispositifs de commande).

Digitalni naslovljivi vmesnik za razsvetljavo - 204. del: Posebne zahteve za krmilja - Nizkonapetostne halogenske sijalke (naprava tipa 3) (IEC 62386-204:2009)

General Information

• Status: Published
• Publication Date: 30-Sep-2009
• ICS: 29.140.50 - Lighting installation systems
• ICS: 35.200 - Interface and interconnection equipment
• Technical Committee: IESV - Lamps and related equipment
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 22-Sep-2009
• Due Date: 27-Nov-2009
• Completion Date: 01-Oct-2009
• Ref Project: EN 62386-204:2009 - Digital addressable lighting interface - Part 204: Particular requirements for control gear - Low voltage halogen lamps (device type 3)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62386-204:2009
01-november-2009
Digitalni naslovljivi vmesnik za razsvetljavo - 204. del: Posebne zahteve za krmilja -
Nizkonapetostne halogenske sijalke (naprava tipa 3) (IEC 62386-204:2009)
Digital addressable lighting interface - Part 204: Particular requirements for control gears;
low voltage halogen lamps (device type 3) (IEC 62386-204:2009)
Digital adressierbare Schnittstelle für die Beleuchtung - Teil 204: Besondere
Anforderungen an Betriebsgeräte - Niedervolt-Halogenlampen (Gerätetyp 3) (IEC 62386-
204:2009)
Interface d'éclairage adressable numérique - Partie 204: Exigences particulières pour les
appareillages; lampes à halogène à basse tension (dispositifs de type 3) (CEI 62386-
204:2009)
Ta slovenski standard je istoveten z: EN 62386-204:2009
ICS:
29.140.50 Instalacijski sistemi za Lighting installation systems
razsvetljavo
35.200 Vmesniška in povezovalna Interface and interconnection
oprema equipment
SIST EN 62386-204:2009 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62386-204:2009

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SIST EN 62386-204:2009

EUROPEAN STANDARD
EN 62386-204

NORME EUROPÉENNE
August 2009
EUROPÄISCHE NORM

ICS 29.140.50; 29.140.99


English version


Digital addressable lighting interface -
Part 204: Particular requirements for control gear -
Low voltage halogen lamps (device type 3)
(IEC 62386-204:2009)


Interface d'éclairage  Digital adressierbare Schnittstelle
adressable numérique - für die Beleuchtung -
Partie 204: Exigences particulières Teil 204: Besondere Anforderungen
pour les appareillages de commande - an Betriebsgeräte -
Lampes à halogène à basse tension Niedervolt-Halogenlampen (Gerätetyp 3)
(dispositif de type 3) (IEC 62386-204:2009)
(CEI 62386-204:2009)




This European Standard was approved by CENELEC on 2009-07-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels


© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62386-204:2009 E

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SIST EN 62386-204:2009
EN 62386-204:2009 - 2 -
Foreword
The text of document 34C/876/FDIS, future edition 1 of IEC 62386-204, prepared by SC 34C, Auxiliaries
for lamps, of IEC TC 34, Lamps and related equipment, was submitted to the IEC-CENELEC parallel vote
and was approved by CENELEC as EN 62386-204 on 2009-07-01.
This Part 204 is intended to be used in conjunction with EN 62386-101 and EN 62386-102, which contain
general requirements for the relevant product type (control gear or control devices).
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62386-204:2009 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60598-1 NOTE  Harmonized as EN 60598-1:2008 (modified).
IEC 60669-2-1 NOTE  Harmonized as EN 60669-2-1:2004 (modified).
IEC 60921 NOTE  Harmonized as EN 60921:2004 (not modified).
IEC 60923 NOTE  Harmonized as EN 60923:2005 (not modified).
IEC 60925 NOTE  Harmonized as EN 60925:1991 (not modified).
IEC 60929 NOTE  Harmonized as EN 60929:2006 (not modified).
IEC 61347-1 NOTE  Harmonized as EN 61347-1:2008 (modified).
IEC 61347-2-3 NOTE  Harmonized as EN 61347-2-3:2001 (not modified).
IEC 61547 NOTE  Harmonized as EN 61547:2009 (not modified).
CISPR 15 NOTE  Harmonized as EN 55015:2006 (not modified).
__________

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SIST EN 62386-204:2009
- 3 - EN 62386-204:2009
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.

Publication Year Title EN/HD Year

IEC 62386-101 2009 Digital addressable lighting interface - EN 62386-101 2009
Part 101: General requirements - System


IEC 62386-102 2009 Digital addressable lighting interface - EN 62386-102 2009
Part 102: General requirements - Control gear

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SIST EN 62386-204:2009

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SIST EN 62386-204:2009
IEC 62386-204
®
Edition 1.0 2009-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Digital addressable lighting interface –
Part 204: Particular requirements for control gear – Low voltage halogen lamps
(device type 3)

Interface d’éclairage adressable numérique –
Partie 204: Exigences particulières pour les appareillages de commande –
Lampes à halogène à basse tension (dispositif de type 3)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ICS 29.140.50; 29.140.99 ISBN 2-8318-1040-2
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 62386-204:2009
– 2 – 62386-204 © IEC:2009
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 General .7
5 Electrical specifications .7
6 Interface power supply .7
7 Transmission protocol structure.7
8 Timing .7
9 Method of operation .7
10 Declaration of variables .8
11 Definition of commands .9
12 Test procedures .14
Annex A (informative) Examples of algorithms .35
Bibliography.36

Figure 1 – Application extended configuration command sequence example.10
Figure 2 – Test sequence 'QUERY FEATURES'.15
Figure 3 – Test sequence 'QUERY SHORT CIRCUIT' .16
Figure 4 – Test sequence 'QUERY OPEN CIRCUIT' .17
Figure 5 – Test sequence 'QUERY LOAD DECREASE' .18
Figure 6 – Test sequence 'QUERY LOAD INCREASE' .19
Figure 7 – 'QUERY CURRENT PROTECTOR ACTIVE: Underload' .20
Figure 8 – 'QUERY CURRENT PROTECTOR ACTIVE: Overload' .21
Figure 9 – 'QUERY THERMAL SHUT DOWN' .22
Figure 10 – 'QUERY THERMAL OVERLOAD'.23
Figure 11 – 'REFERENCE SYSTEM POWER' .24
Figure 12 – 'REFERENCE SYSTEM POWER: 100 ms-timeout' .25
Figure 13 – 'REFERENCE SYSTEM POWER: Command in-between' .27
Figure 14 – 'REFERENCE SYSTEM POWER: 15 minutes timer' .27
Figure 15 – 'REFERENCE SYSTEM POWER: failed'.28
Figure 16 – 'ENABLE / DISABLE CURRENT PROTECTOR' .29
Figure 17 – 'ENABLE DEVICE TYPE: Application extended commands'.30
Figure 18 – 'ENABLE DEVICE TYPE: Application extended configuration commands 1'.32
Figure 19 – 'ENABLE DEVICE TYPE: Application extended configuration commands 2'.32
Figure 20 – 'QUERY EXTENDED VERSION NUMBER' .33
Figure 21 – 'RESERVED APPLICATION EXTENDED COMMANDS'.34

Table 1 – Declaration of variables.9
Table 2 – Summary of the application extended command set .14

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SIST EN 62386-204:2009
62386-204 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 204: Particular requirements for control gear –
Low voltage halogen lamps (device type 3)


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
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 62386-204 has been prepared by subcommittee 34C: Auxiliaries
for lamps, of IEC technical committee 34: Lamps and related equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
34C/876/FDIS 34C/885/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part 204 is intended to be used in conjunction with IEC 62386-101 and IEC 62386-102,
which contain general requirements for the relevant product type (control gear or control
devices).

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SIST EN 62386-204:2009
– 4 – 62386-204 © IEC:2009
A list of all parts of IEC 62386 series, under the general title Digital addressable lighting
interface, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition; or
• amended.

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SIST EN 62386-204:2009
62386-204 © IEC:2009 – 5 –
INTRODUCTION
This first edition of IEC 62386-204 is published in conjunction with IEC 62386-101 and
IEC 62386-102. The division of IEC 62386 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.
This International Standard, and the other parts that make up IEC 62386-200 series, in
referring to any of the clauses of IEC 62386-101 or IEC 62386-102, specifies the extent to
which such a clause is applicable and the order in which the tests are to be performed. The
parts also include additional requirements, as necessary. All parts that make up the
IEC 62386-200 series are self-contained and therefore do not include references to each
other.
Where the requirements of any of the clauses of IEC 62386-101 or IEC 62386-102 are
referred to in this International Standard 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 101 or Part 102 apply, except any which are inapplicable to the
specific type of lamp control gear covered by Part 204.
All numbers used in this International Standard 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".

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SIST EN 62386-204:2009
– 6 – 62386-204 © IEC:2009
DIGITAL ADDRESSABLE LIGHTING INTERFACE –

Part 204: Particular requirements for control gear –
Low voltage halogen lamps (device type 3)



1 Scope
This International Standard specifies a protocol and methods of test for the control by digital
signals of electronic control gear for use on a.c. or d.c. supplies, associated with low voltage
halogen lamps.
NOTE Tests in this standard are type tests. Requirements for testing individual control gear during production are
not included.
2 Normative references
The following referenced documents are indispensable for the application 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 62386-101:2009, Digital addressable lighting interface – Part 101: General requirements
– System
IEC 62386-102:2009, Digital addressable lighting interface – Part 102: General requirements
– Control gear
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Clause 3 of IEC 62386-
101:2009 and Clause 3 of IEC 62386-102:2009 apply, with the following additions.
3.1
reference measurement
process during which gear determines the actual lamp load with internal procedures and
measurements, not specified by this standard
NOTE The details of this process are a matter of detailed design of gear and are outside the scope of this
standard.
3.2
detection of load decrease
recognition that the actual lamp load is significantly below the load measured during a
successful ‘reference measurement’
NOTE The criteria for regarding a load increase or decrease as significant can only be decided by the
manufacturer and these criteria should be described in the manual.
3.3
detection of load increase
recognition that the actual lamp load is significantly above the load measured during a
successful ‘reference measurement’
NOTE The criteria for regarding a load increase or decrease as significant can only be decided by the
manufacturer, and these criteria should be described in the manual.

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SIST EN 62386-204:2009
62386-204 © IEC:2009 – 7 –
3.4
current protector
protective device switching off the output if the actual lamp load differs by more than ΔP from
the load detected during the reference measurement.
NOTE The value ΔP can only be specified by the manufacturer of the control gear and this value should be stated
in the manual.
3.5
thermal overload
scenario where the maximum permissible gear temperature is exceeded
3.6
thermal shut down
scenario where gear switches off the lamp because of a persistent thermal overload
3.7
light level reduction due to thermal overload
reduction of light level with the objective of decreasing gear temperature
4 General
The requirements of Clause 4 of IEC 62386-101:2009 and Clause 4 of IEC 62386-102:2009
apply.
5 Electrical specifications
The requirements of Clause 5 of IEC 62386-101:2009 and Clause 5 of IEC 62386-102:2009
apply.
6 Interface power supply
The requirements of Clause 6 of IEC 62386-101:2009 and Clause 6 of IEC 62386-102:2009
apply, if a power supply is integrated with the control gear.
7 Transmission protocol structure
The requirements of Clause 7 of IEC 62386-101:2009 and Clause 7 of IEC 62386-102:2009
apply.
8 Timing
The requirements of Clause 8 of IEC 62386-101:2009 and Clause 8 of IEC 62386-102:2009
apply.
9 Method of operation
The requirements of Clause 9 of IEC 62386-101:2009 and Clause 9 of IEC 62386-102:2009
apply, except as follows:
Addition to Clause 9 of IEC 62386-102:2009:

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SIST EN 62386-204:2009
– 8 – 62386-204 © IEC:2009
9.9 Detection of load decrease
If the actual lamp load is significantly below the load measured during a successful ‘reference
measurement’, the gear may switch off the lamp if this is necessary for its safe operation. The
flag bit ‘load decrease’ is to be set in such circumstances.
9.10 Detection of load increase
If the actual lamp load is significantly above the load measured during a successful ‘reference
measurement’, the gear may switch off the lamp if this is necessary for its safe operation. The
flag bit ‘load increase’ is to be set in such circumstances.
9.11 Current protector
If the actual lamp load of the control gear differs by more than a defined amount ΔP from the
load detected during the reference measurement, the current protector becomes active and
switches off the lamp.
The current protector shall not become active until there has been a successful reference
measurement.
There are two possible situations in which the current protector becomes active:
– Overload: The actual lamp load is higher than the load detected during the reference
measurement by at least ΔP.
– Underload: The actual lamp load is lower than the load detected during the reference
measurement by at least ΔP.
The current protector shall become inactive either on mains voltage interruption or on receipt
of a command which causes the arc power level to be 0. If after switching on again the
situation causing the current protector to become active still pertains, the current protector
shall become active again.
The current protector can be enabled and disabled by the commands 225 'ENABLE
CURRENT PROTECTOR' and 226 'DISABLE CURRENT PROTECTOR'.
An active current protector shall become inactive on reception of command 226 ‘DISABLE
CURRENT PROTECTOR’.
If the current protector is active command 224 ‘REFERENCE SYSTEM POWER’ shall be
ignored.
9.12 Lamp replacement on gear with load increase/decrease or current protector
feature
If a lamp is replaced with one of a different wattage without a new ‘REFERENCE SYSTEM
POWER’ measurement being performed, the gear shall detect a load increase or a load
decrease as appropriate.
NOTE If a lamp is replaced with one of the same wattage, the user should initiate a new ‘REFERENCE SYSTEM
POWER’ measurement only if this is recommended by the manufacturer.
10 Declaration of variables
The requirements of Clause 10 of IEC 62386-101:2009 and Clause 10 of IEC 62386-102:2009
apply, with the following additional variables for this device type, as indicated in Table 1.

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SIST EN 62386-204:2009
62386-204 © IEC:2009 – 9 –
Power levels stored in persistent memory due to command 224 ‘REFERENCE SYSTEM
POWER’ shall not be changed due to command ‘RESET’.
Additional variables for this device type are as indicated in Table 1.
Table 1 – Declaration of variables
a
Variable Default value Reset value Range of Memory
validity
(control gear leaves
the factory)
b c
“FAILURE STATUS” ???? ???? no change 0 – 255 1 byte RAM
“FEATURE BYTE” factory burn-in no change 0 – 255 1 byte ROM
“EXTENDED 1 no change 0 – 255 1 byte ROM
VERSION NUMBER”
“DEVICE TYPE” 3 no change 0 – 254, 1 byte ROM
255 (mask)
? = undefined.
a
Persistent memory (storage time indefinite) if not stated otherwise.
b
Power up value.
c
Bit 7 of this byte shall be stored in the persistent memory.
11 Definition of commands
The requirements of Clause 11 of IEC 62386-101:2009 and Clause 11 of IEC 62386-102:2009
apply, except as follows:
Amendment of Clause 11 of IEC 62386-102:2009:
11.3.1 Queries related to status information
Amendment:
Command 146: YAAA AAA1 1001 0010 'QUERY LAMP FAILURE'
Asks if there is a lamp problem at the given address. Answer shall be ‘Yes’ or ‘No’.
‘Yes’ means either open circuit or short circuit or load increase or load decrease or current
protector active. ‘No’ does not necessarily imply that no lamps have failed.
Command 153: YAAA AAA1 1001 1001 'QUERY DEVICE TYPE'
Answer shall be 3.
11.3.4 Application extended commands
Replacement:
11.3.4.1 Application extended configuration commands
Every configuration command (224 – 226) shall be received a second time within 100 ms
(nominal) before it is executed in order to reduce the probability of incorrect reception. No
other commands addressing the same control gear shall be sent between these two
commands, otherwise the first such command shall be ignored and the respective control or
configuration sequence shall be aborted.

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SIST EN 62386-204:2009
– 10 – 62386-204 © IEC:2009
Command 272 shall be received before the two instances of the application extended
configuration command, but not between them (see Figure 1).

Application extended Application extended
Command 272
configuration command configuration command
max. 100 ms
IEC  639/09


Figure 1 – Application extended configuration command sequence example
All values of DTR shall be checked against the values mentioned in Clause 10, Range of
validity, i.e. the value shall be set to the upper / lower limit if it is above / below the valid
range defined in Table 1.
Command 224: YAAA AAA1 1110 0000 ‘REFERENCE SYSTEM POWER’
Reference measurement is an optional feature, the presence of which is indicated in bits 2, 3
and 4 of the ‘FEATURES’ byte (see command 240). If all these bits are zero, then reference
measurement is not supported, and this command shall be ignored. Otherwise, on receipt of
this command, the control gear shall proceed as follows.
The control gear shall measure and store system power levels in order to detect load increase
or load decrease. It is up to the manufacturer to decide upon the number of system power
levels each type of gear should measure.
The measured power level shall be stored in the persistent memory. Commands received
during the measuring period shall be ignored except query commands and command 256.
After 15 min at most, the control gear shall finish the measurement process and shall go back
to normal operation. The measurement process shall be aborted if command 256
‘TERMINATE’ is received.
When there has been no successful reference measurement or the most recent reference
measurement was unsuccessful, bit 7, reference measurement failed, in the answer to
command 240 ‘QUERY FAILURE STATUS’ shall be set and command 249 ‘QUERY
REFERENCE MEASUREMENT FAILED’ shall be answered with ‘Yes’.
If the current protector is active this command shall be ignored. In this case bit 7, reference
measurement failed, in the answer to command 240 ‘QUERY FAILURE STATUS’ shall be set
and command 249 ‘QUERY REFERENCE MEASUREMENT FAILED’ shall be answered with
‘Yes’.
Command 225: YAAA AAA1 1110 0001 'ENABLE CURRENT PROTECTOR'
Enables the current protector of the control gear. The current protector can become active
after a successful reference measurement started by command 224.
The default configuration of the gear is 'CURRENT PROTECTOR ENABLED'. The status of
the current protector (enabled / disabled) shall be stored in the persistent memory of the
control gear.
The current protector is an optional feature. Control gear without this feature shall not react
(see command 240).

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SIST EN 62386-204:2009
62386-204 © IEC:2009 – 11 –
Command 226: YAAA AAA1 1110 0010 'DISABLE CURRENT PROTECTOR'
Disables the current protector of the control gear.
The current protector is an optional feature. Control gear without this feature shall not react in
any way.
(see command 240).
Commands 227: YAAA AAA1 1110 0011
Reserved for future needs. The control gear shall not react in any way.
Commands 228-231: YAAA AAA1 1110 01XX
Reserved for future needs. The control gear shall not react in any way.
Commands 232-239: YAAA AAA1 1110 1XXX
Reserved for future needs. The control gear shall not re
...