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Reference number: EXCERPT FROM DLMS UA 1000-3:1999, First Edition

© Copyright 1997-1999 DLMS User Association

EXCERPT FROM

Companion Specificationfor Energy Metering

COSEM

Identification System

DLMS User Association

device ™

language

message

specification



DLMS User Association, EXCERPT FROM COSEM Identification System, First Edition

DLMS User Association EXCERPT DLMS UA 1000-3 ed.1 2/15







Table of Contents

1. Foreword...............................................................................................................4

2. Scope....................................................................................................................5

3. Introduction ..........................................................................................................63.1 Referenced Documents.........................................................................................63.2 Abbreviations.........................................................................................................6

4. OBIS code structure ............................................................................................8

5. Value group definitions........................................................................................95.1 Value group A........................................................................................................9

5.2 Value group B........................................................................................................95.3 Value group C........................................................................................................95.3.1 Notes for abstract objects.................................................................................105.3.2 Notes for electricity related objects...................................................................115.4 Value group D......................................................................................................115.4.1 Notes for electricity related objects...................................................................115.5 Value group E......................................................................................................125.6 Value group F ......................................................................................................125.6.1 Notes for electricity related objects...................................................................125.7 Abstract objects ...................................................................................................135.8 Electricity related general purpose objects ..........................................................14

5.9 Electricity list objects............................................................................................155.10 Electricity data profile objects ..............................................................................15






1. Foreword

Copyright:

© Copyright 1997-1999 DLMS User Association.

... more follows ...

(comp. DLMS UA 1000-3, First Edition)






2. Scope

The OBIS "Object Identification System" defines the necessary identification codes (ID-codes) forcommonly used data items inside metering devices. This standard specifies on one hand the

overall structure of the identification code system, applicable to electricity as well as otherconsumption sectors (e.g. gas, water, heat). On the other hand it specifies the mapping of themeaning of data items to their identification codes. It applies to both simple and complexmeasurement configurations, such as meters, tariff units, data concentrators or other electronicset-ups for measuring of energy consumption.

The ID-codes are based on the current EDIS document ([1]). They shall be used as logical namesin DLMS-COSEM for the specified purpose exclusively.

Today the scheme for non-electricity types of energy are not detailed. This shall be done in futurereleases, which have to be created in conjunction with the standardisation committees for othermedia and/or existing user groups.

In addition to EDIS OBIS covers not only measurement and tariff data items. It extends thephysical view of EDIS to a more global one. DLMS-COSEM needs unique names to identify allobjects in a system. Therefore OBIS guarantees unique identifiers inside the whole systemincluding abstract objects to configure or influence the behaviour of the device.






3. Introduction

The trend for electronic meters and auxiliary devices for the measurement and billing ofpower/energy is towards the integration of an ever increasing number of functions and

measurement value calculations into one device. The development of device technology ismoving toward consumption measurement devices which are capable of carrying out complexmeasurements e.g. measurement of electrical consumption in 4 quadrants.

For further analysis of measurement values - especially for billing purposes - it is necessary thatall such values are uniquely identifiable, independent of device and manufacturer. The samerequirement applies to reading out of device data on-site using a hand held data-capturing unit,as well as to remote transmission of data to a central data analysis location. The requirementimplies that all data/measurement values are assigned a unique identification number. On-siteand remote meter reading, as well as of the evaluation of data recorded from several differingsources, will introduce new requirements on the identification system. For this purpose, themeasurement value channel and the medium (gas, water, heat, etc.) have been taken into

account in the new system. This allows meter data originating from differing sources to betransmitted and identified within one transmission telegram.

Due to its general structure, the identification system OBIS, which is fully defined today forelectrical applications, is also suitable for application in other areas (gas, water, heat) or forabstract objects.

3.1 Referenced Documents

Ref. Title

[1] Electricity meters - Part 3: Tariff metering device as additional equipment for electricity meters -EDIS - Energy Data Identification System; DIN 43863-3 Entwurf September 1997. Project IEC62056-61 (1998)

3.2 Abbreviations

The terms used in this document shall be according to the International Electrotechnical Vocabu-lary IEV, IEC50 (301,302, 303). Deviations from this principle are possible in the current versionof the document.

Abbreviation Explanation

COSEM Companion Specification for Energy Metering

EDIS Energy Data Identification System, comp. [1].

IC Interface Class

IEC International Electrotechnical Commission

OBIS Object Identification System






... more follows ...

(comp. DLMS UA 1000-3, First Edition)






4. OBIS code structure

OBIS codes are a combination of 6 value groups, which describe (in a hierarchical way) the ex-act meaning of each data item.

A B C D E F

♦ Value group AThe characteristic of the object to be identified (abstract object, electricity-, gas-, heat-, water-related object).

The value group A corresponds to value group M (medium) in [1] for display and IEC 61107based communication.

♦ Value group B

Where equipment has several inputs for energy/quantity values of the same type or of differ-ing types (e.g. in data concentrators, registration units), the value is assigned a physicalchannel number for identification of the information source.

The value group B corresponds to value group KK (channel) in [1] for display and IEC 61107based communication.

♦ Value group CPhysical value of the information source concerned (e.g. Current, Voltage, Power, Volume,Temperature). Value group C specifies the Quantity by the type . Quantity is the main valuegroup, to which groups 4, 5 and 6 are related.

The value group C corresponds to value group GG (measurement quantity) in [1] for displayand IEC 61107 based communication.

♦ Value group DThe value group D defines the result of processing a Quantity according to a specific algo-rithm. This can e.g. deliver power and energy readings as well as results derived from those.

The value group D corresponds to value group AA (measurement type) in [1] for display andIEC 61107 based communication.

♦ Value group E

This value group details the measurement type as defined with value groups A to D into dif-ferent readings which can e.g. controlled by rate switching.

The value group E corresponds to value group T (rate) in [1] for display and IEC 61107 basedcommunication.

♦ Value group FThis value group further subdivides results which are partly defined by value groups A to E. Atypical usage is the allocation to different time periods (reset periods).

The value group F corresponds to value group VV (period) in [1] for display and IEC 61107

based communication.






5. Value group definitions

5.1 Value group AValue group A contains the general object environment.The range for value group A is 0 to 15.

Value group A0 Abstract Objects

1 Electricity related object

6 Heat related object

7 Gas related object

8 Water related object

All other possible values are re-served.

With implementations which contain only one energy type, even abstract objects may be definedusing the code for the energy type.

5.2 Value group B

Devices with several physical channels which generate measuring results can separate those by

assigning different channel numbers to those physical channels. The allowed range is of 1 – 64. Ifno channel information is essential the value 0 shall be assigned. Channel numbers from 65 to127 are reserved for future applications.

Value Group B0 no channel specified1 Channel 1

…

64 Channel 64

65 .. 127 reserved

128 .. 254 manufacturer spe-cific code

255 reserved

With devices having just one channel, the usage of channel no. 1 even for device specific nonmetering related data items is allowed.

5.3 Value group C

This value group is intended to define the type of a data item in its context as described by the

value group A. The meaning of this value group is dependent on the value group A and will beenlarged for additional object environments in future releases. Co-operation with standardisationgroups of the different energy media will be necessary.






Value group C

abstract objects (val.A = 0)0 general purpose objects

1 Objects of class "Clock"

10 Objects of class "Script Table"

11 Objects of class "Special Days Table"

12 Objects of class "Schedule"

13 Objects of class "Activity Calendar"

20 Objects of class "IEC 1107 Setup"

96 General service entries

97 General error messages

Value group C

electrical energy related objects (val. A=1) 0 general purpose objects

1 ΣLi .Active power+

2 ΣLi Active power-3 ΣLi Reactive power+

4 ΣLi Reactive power-

5 ΣLi Reactive power QI

6 ΣLi Reactive power QII

7 ΣLi Reactive power QIII

8 ΣLi Reactive power QIV

9 ΣLi Apparent power+

10 ΣLi Apparent power-

13 ΣLi Power factor

14 Network frequency

21 L1 Active power+

22 L1 Active power-

23 L1 Reactive power+

24..30 L1 etc.

31 L1 Current

32 L1 Voltage

33 L1 Power factor

34 L1 Frequency

41 L2 Active power+

42 L2 Active power-


44..54 L2 etc.

61 L3 Active power+

62 L3 Active power-


64..74 L3 etc.

96 Electricity related service entries

97 Electricity related error messages

98 List

99 Data profile

5.3.1 Notes for abstract objects

0 general purpose objects: Here objects are allocated which define certain necessary accesspoints to the meter. In general those objects are fully defined for the remaining value groupsA,B,D..FAll objects which are fully defined in all value groups are detailed in chapter 5.7.






5.3.2 Notes for electricity related objects

For definitions of the listed items see [1].Value group C = 0 defines general data items for electricity meters. Comp. chapter 5.8.Value group C = 96 defines data items used electricity metering related service entries. Comp.

chapter 5.8.

Value group C = 97 defines data items electricity metering related error messages (value group Dis also coded 97). Comp. chapter 5.8.Value group C = 98 defines data items used for list purposes. They are detailed in chapter 5.9.Value group C = 99 defines data items used for profile purposes. They are detailed in chapter

5.10.

5.4 Value group D

The result of processing a Quantity according to a specific algorithm for energy related values ora further subdivision for general values

Value group D

electrical energy related objects, val.A=1, val. C <> 0, 96,97,98,99

1 Cumulative minimum 1

2 Cumulative maximum 1

3 Minimum 1

4 Current average 1

5 Last average 1

6 Maximum demand 1

8 Time integral 1

9 Time integral 210 Time integral 3



13 Minimum 2

14 Current average 2

15 Last average 2

16 Maximum 2



23 Minimum 3

24 Current average 3

25 Last average 326 Maximum 3

55 Test average

58 Test time integral 4


For definitions of the listed items please refer to [1].






5.5 Value group E

Coding of different rates within a specific tariff structure.

Value group Eelectrical energy related objects

(val.A=1)0 Total

1 Rate 1

2 Rate 2

3 Rate 3

4 Rate 4...

9 Rate 9

5.6 Value group F

This value group further subdivides results which are partly defined by value groups A to E. Atypical usage is the allocation to different time periods (reset periods).


Assigning of historical values to various time periods/points.

Value group FVZ Period 1

VZ-1 Period 2

VZ-2 Period 3

VZ-3 Period 4

VZ-4 ...

etc.

101 .. most recent value

102 .. 2 most recent values

….

1xx .. all available values

The most recent (youngest) historical value is identified using the ID-code VZ (state of the histori-cal value counter), and the second youngest is identified by the code VZ-1 etc. The operatingmode of the historical value counter can differ, e.g. modulo-12 or modulo-100, depending on thehighest number of available historical values. The historical value that is represented after reach-ing the limit of the historical value counter, contains the historical value code 0 for modulo-100,and 1 for other (e.g. modulo-12).Values above 100 allow to address profiles which contain more than one historical value. Themaximum number 1xx is device dependent and specifies the full set of available historical values.The maximum allowed value for this is 125.






5.7 Abstract objects

Abstract objects OBIS code

A B C D E F

Objects of class "Clock" 0 x 1 0 x

Objects of class "Script Table" 0 x 10 x x

Object "Special Days Table" 0 x 11 0 x

Object "Schedule" 0 x 12 0 x

Object "Activity Calendar" 0 x 13 0 x

Object "IEC 1107 Setup" 0 x 20 0 x

Object of class “Association (LN or SN)” 0 0 100 0 x

Object of class “Profile” for standard readout 0 0 103 0 x

Device ID numbers (non energy/channel related)

Device ID1 (manufacturing number)............Device ID10

0

0

0

0

96.......96

1.......1

0.......9

Parameter changes:

Number of parameterisationsDate of last parameterisation changeDate of last time switch programme changeDate of last ripple control receiver program change

0000

xxxx

96969696

2222

0123

input/output control signals:

State of the input/output control signals: 0 x 96 3 0

Output pulse duration 0 x 0 9 5

State of the internal control signals: 0 0 96 4 0

Internal operating status 0 x 96 5 0

Battery entries

Battery hour counter (h)

Battery charge display (%)

0

0

0

0

96

96

6

6

0

1Number of power failures

Total failure of all 3 phasesPhase L1Phase L2Phase L3

0000

0000

96969696

7777

0123

Manufacturer specific

.....................

Manufacturer specific

0

0

0

0

96

96

50

96

x

x

Error object 0 0 97 97 x

Tab. 1 ID-codes for abstract components.

Remark: If the value field F is shaded, then value group F is not used.

The undefined value groups B,D and E for the objects of class “Script table” allow to addressseveral instances of this object.

The value group F is not used for those objects.,

In the manufacturer specific objects only those values shall be placed, which are not representedby another defined code, but need representation on the display as well. If this is not required, thecode shall use the possibilities of a value group above 127.






5.8 Electricity related general purpose objects

electricity related general purpose objects OBIS-code

A B C D E F

Free ID-numbers for utilities:Electricity ID 1...Electricity ID 10

1

1

x

x

0

0

0

0

0

9

Historical value/reset counter entriesStatus (VZ) of the historical value counterNumber of available historical valuesTime stamp of the historical value VZ (last reset)Time stamp of the historical value VZ-1

.........................................................Time stamp of the historical value VZ-n

1111

1

xxxx

x

0000.....0

1111......1

0122......2

VZVZ-1

.......VZ-n

Program entries

Program version no.Parameter record no.Time switch program no.RCR program no.

1111

xxxx

0000

2222

0123

Output pulse constantsRLW [Imp/kWh] (Active energy, metrological LED )RLB [Imp/kvarh] (Reactive energy, metrological LED)RLS [Imp/kVAh)] (Apparent energy, metrological LED)RAW [Imp/kWh] (Active energy, output contact)RAB [Imp/kvarh] (Reactive energy, output contact)RAS [Imp/kVAh)] (Apparent energy, output contact)

111111

xxxxxx

000000

333333

012345

RatiosReading factor for powerReading factor for energy

Transformer ratio – currentTransformer ratio – voltage

11

11

xx

xxx

00

00

44

44

01

23

Threshold valuesThreshold power for over-consumption [kW]

limit 1.......................................limit 4limit for rate 1............................limit for rate 9

1

11

1

x

xx

x

0......00....0

5...55...5

1...12...2

1...41...9

Nominal values

Voltage [V]Base/nominal current [A]

Frequency [Hz)Maximum current [A]

11

11

xx

xx

00

00

66

66

01

23

Input pulse constants

REW [Imp/kWh] (active energy)REB [Imp/kvarh] (reactive energy)RES [Imp/kVAh] (apparent energy)

111

xxx

000

777

012

Measurement-/registration-period durationMeasurement period 1 (min), for average value 1Measurement period 2 (min), for average value 2Measurement period 3 (sec), for instantaneous valueMeasurement period 4(sec), , for test valueRecording period 1 (min), for load profileRecording period 2 (min), for load profile

111111

xxxxxx

000000

888888

012345

Time entries

Number of days since last reset 1 x 0 9 0





electricity related general purpose objects OBIS-codeA B C D E F

All entries defined in abstract objects (val A=0) as service

entries (val C=96) and error codes (val C=97) can be repre-sented here as well for electricity related values

Remark: If the value field F is shaded, then value group F is not used.

It has to be observed, that some of the codes above are normally not used, as the related dataitems are covered by attributes of already defined objects (application dependent)

5.9 Electricity list objects

Lists - identified with one OBIS code - are defined as a series of any kind of data (e.g. measure-ment value, constants, status, events).

5.10 Electricity data profile objects

Data profiles - identified with one OBIS code - are defined as a series of measurement values ofthe same type or of groups of the same kind consisting of a number of different measurementvalues.

electricity data profile objects OBIS-codeA B C D E F

Load profile with recording period 1 1 x 99 1 0

Load profile with recording period 2 1 x 99 2 0

Event log 1 x 99 98 0certification data log 1 x 99 99 0

Value group F is not used for those data items.

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