Technical Description
Wired M-Bus
Water Meters
flowIQ® 2101/3100
TECHNICAL DESCRIPTION Wired M-Bus
Water Meters flowIQ® 2101/3100
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Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
Contents
1 Introduction........................................................................................................................................................... 4
2 M-Bus water meter flowIQ® 2101/3100 ................................................................................................................ 4
3 Design .................................................................................................................................................................... 5
4 Installation ............................................................................................................................................................. 5
5 Data communication ............................................................................................................................................. 6
6 Reading loggers from flowIQ® 2101/3100 wired M-Bus....................................................................................... 17
7 Configuration of meter via the M-Bus network .................................................................................................... 17
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1.1 M-Bus ............................................................................................................................................................ 4
1.2 M-Bus communication .................................................................................................................................. 4
2.1 Physical properties ........................................................................................................................................ 5
3.1 Applications................................................................................................................................................... 5
5.1 Bus communication ...................................................................................................................................... 6
3.1.1 Analysis ................................................................................................................................................. 5
3.1.2 Billing ..................................................................................................................................................... 5
3.1.3 Emulation .............................................................................................................................................. 5
3.1.4 Controlling and regulating ..................................................................................................................... 5
5.2 Communication interval ................................................................................................................................ 6
5.3 Addressing forms .......................................................................................................................................... 6
5.3.1 Primary addressing ................................................................................................................................ 7
5.3.2 Secondary addressing ........................................................................................................................... 8
5.3.3 Enhanced secondary addressing ........................................................................................................... 9
5.3.4 Wildcard search with break detection ................................................................................................ 10
5.4 M-Bus formats ............................................................................................................................................ 10
5.5 M-Bus master to M-Bus water meter ......................................................................................................... 12
5.6 M-Bus slave to M-Bus master ..................................................................................................................... 13
5.6.1 REQ_UD2 -> RSP_UD ........................................................................................................................... 13
5.6.2 REQ_UD1 -> ACK ................................................................................................................................. 14
5.6.3 REQ_SKE -> RSP_SKE .......................................................................................................................... 14
5.7 Information codes ....................................................................................................................................... 14
5.7.1 Status field .......................................................................................................................................... 15
5.7.2 Temporary error.................................................................................................................................. 15
5.8 Datagram .................................................................................................................................................... 16
7.1 Setting Primary M-Bus address ................................................................................................................... 18
7.2 Setting Date and time ................................................................................................................................. 19
Wired M-Bus
Water Meters flowIQ® 2101/3100 TECHNICAL DESCRIPTION
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
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8 Protocol ............................................................................................................................................................... 20
7.3 Application select/reset .............................................................................................................................. 19
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8.1 RSP_UD data flowIQ® 2101/3100 data using Kamstrup specified VIFE....................................................... 20
8.2 RSP_SKE response from flowIQ® 2101/3100 .............................................................................................. 25
8.3 Data header in RSP_UD ............................................................................................................................... 26
8.4 DIF (Data Information Field) ........................................................................................................................ 27
8.5 Primary VIF (Value Information Field) ......................................................................................................... 28
8.6 Special purpose VIF ..................................................................................................................................... 29
8.7 Main VIFE-code extension ........................................................................................................................... 29
TECHNICAL DESCRIPTION Wired M-Bus
Water Meters flowIQ® 2101/3100
4
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
1
Introduction
1.1 M-Bus
1.2 M-Bus communication
2
M-Bus water meter flowIQ® 2101/3100
This technical description describes the wired M-Bus interface of water meters flowIQ 2101 and flowIQ 3100.
For further technical information about these water meters, please refer to their respective Technical Description.
•
M-Bus is a bus system especially suited for communication with consumption meters. The system consists of an
M-Bus Master and one or more meters with M-Bus interface.
M-Bus is standardized in the European standard EN 13757, as well as in the OMS TR02.
Communication on the M-Bus is an asynchronous serial bit transmission in half duplex mode, which means that it is
possible only to transmit one way at a time on the M-Bus.
The framing of the communication is 1 start bit, 8 data bits, 1 parity bit (even) and 1 stop bit.
The M-Bus is communicating via voltage modulation from the M-Bus Master to the M-Bus water meter and current
modulation from the M-Bus water meter to the M-Bus Master. Communication media is via an ordinary two-wire
cable. A twisted pair, non-shielded cable is recommended.
The M-Bus water meter supports primary, secondary and enhanced secondary addressing as well as 300, 2400 and
9600 baud communication speed.
The M-Bus water meter flowIQ® 2101/3100 are designed with manufacturer specified VIF extensions, so called
VIFE codes.
These VIFE codes are formatting the data, whereby decoding of the content is much easier, as when using
manufacturer specified data.
The connection of the M-Bus water meter and the M-Bus network is realized with a fixed two wire cable.
Wired M-Bus
Water Meters flowIQ® 2101/3100 TECHNICAL DESCRIPTION
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
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2.1 Physical properties
3
Design
3.1 Applications
3.1.1 Analysis
3.1.2 Billing
3.1.3 Emulation
3.1.4 Controlling and regulating
4
Installation
•
The M-Bus interface is integrated in the flowIQ® 2101/3100.
The bus is polarity independent.
The M-Bus water meter have a max power consumption of 1 unit load (1.5 mA) drawn from the M-Bus Master.
Rin: 440 Ohm
Cin: 0.5nF
Bus current and voltages according to EN 13757-2.
The M-Bus water meters fulfil the requirements in the M-Bus standard EN 13757:2013 as well as the
OMS TR02:2015 and can be used in a wide variety of applications using M-Bus protocol.
The M-Bus water meters are designed with focus on high flexibility to fulfill a wide pallet of existing and future
applications.
The flowIQ® 2101/3100 support high quantities of data and all relevant data for analysis can be read out.
This is valid for both actual meter data as well as for target data.
All relevant data for billing purposes can be read out from the flowIQ® 2101/3100.
The wired M-Bus datagram in flowIQ® 2101/3100 is fixed and cannot be altered
The water meter can deliver online data in intervals down to 15 seconds (however at reduced battery lifetime) for
controlling and regulating purposes with a high communication speed.
As M-Bus is polarity independent there is no + and ÷ to care about.
Configuring the primary address can be done with METERTOOL HCW using an optical readout head or via the
M-Bus network. It is recommended that the entire M-Bus system is not powered up during installation of new MBus water meters.
TECHNICAL DESCRIPTION Wired M-Bus
Water Meters flowIQ® 2101/3100
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Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
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Data communication
5.1 Bus communication
5.2 Communication interval
5.3 Addressing forms
•
The M-Bus water meter design is based on the newest technology, offering high-speed communication as well as
very frequent reading interval.
The transmission speed is automatically detected by the M-Bus water meter. When the M-Bus water meter
receives a message from the M-Bus Master on a certain speed, it will reply with the same speed.
The M-Bus water meters flowIQ® 2101/3100 supports 300, 2400 and 9600 baud communication speed.
In order to maintain the full 16 years battery lifetime of the water meter, the read out interval shall be longer than
1 minute. Since the most frequent integration interval in the flowIQ® 2101/3100 is 32 seconds, a more frequent
reading is not recommended. A more frequent reading interval than 32 seconds will provide redundant
information.
To make the M-Bus system operate with more M-Bus water meters connected, it is necessary to distinguish
between the individual M-Bus water meter. This is done by means of following M-Bus ID numbers in each M-Bus
meter:
• Primary address: 001...250, and the special addresses 0, 253, 254 and 255
• M-Bus ID number: 8 digits 00000000… 99999999
• Manufacturer ID: Always 2D2Ch for ’KAM‘ for Kamstrup M-Bus water meter
• Version ID flowIQ® 2101 1Fh
• Version ID flowIQ® 3100 1Dh
• Device type ID: 06h = Volume warm, 16h = Volume cold
• Fabrication number: Serial number, 8 digits 0000000… 99999999
When the M-Bus Master sends a message on the M-Bus, some or all of the above ID numbers on the M-Bus water
meters are encoded in the message. Thus, only the M-Bus water meter with the addressed ID numbers will reply.
Manufacturer ID, Version ID and Fabrication number are permanently encoded into the M-Bus water meter and
cannot be changed.
Wired M-Bus
Water Meters flowIQ® 2101/3100 TECHNICAL DESCRIPTION
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
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5.3.1 Primary addressing
A valid primary M-Bus address has a value between 000 and 250.
The primary M-Bus address is either configured specific in the flowIQ® 2101/3100 or the last digits of the meter
number are used.
As factory default, the primary address in flowIQ® 2101/3100 equals to the last 3 digits of the meter number. If the
last 3 digits are larger than 250 (e.g. 345) the first digit is ignored and the M-Bus water meter address is only
determined by the last 2 digits (e.g. 45).
During the ordering process specific primary addresses can be specified.
Changing the primary address can be performed in following ways:
• Programming with METERTOOL HCW, via Optical Readout Head
• Remotely, via M-Bus master
In connection with primary addressing of the M-Bus, two or more M-Bus water meters on the same M-Bus system
cannot have the same primary address. However, in connection with secondary addressing or enhanced secondary
addressing it is possible to distinguish M-Bus water meters with the same primary address on the same M-Bus.
•
Standard address range for an M-Bus water meter is 001... 250.
In addition to this, there are 4 special addresses that work as follows:
Adr. 000: Ordinary primary address reserved for non-configured M-Bus water meter.
Adr. 253: Used for secondary addressing.
Only M-Bus water meters selected by (enhanced) secondary addressing will reply.
Adr. 254: All M-Bus meters will reply to this address. The address can only be used in systems where only 1 M-Bus
water meter is connected.
Adr. 255: No M-Bus meter will reply to this address, but all will receive the message. This address makes it
possible e.g. to change the baud rate, on an entire system at the same time, by sending only one
telegram.
TECHNICAL DESCRIPTION Wired M-Bus
Water Meters flowIQ® 2101/3100
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Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
5.3.2 Secondary addressing
Start character
68h L-field
0Bh L-field
0Bh Start character
68h C-field
53h or 73h
A-field
FDh CI-field
52h
ID No. LSB
37 or FF BCD
E.g. M-Bus ID number = 4118737
ID No.
87 or FF BCD
ID No.
11 or FF BCD
ID No. MSB
04 or FF BCD
Man. ID LSB
2Dh or FFh
KAM encoded to 2D2Ch
Man. ID MSB
2Ch or FFh
Version ID
flowIQ 2101
1Dh
Version ID
flowIQ 2101
1Fh
Device ID
04h, 07h, 0Ah, 0Bh, 0Ch, or 0Dh (see also ID numbers) or FFh
Checksum
Xxh Stop character
16h
A valid secondary M-Bus address has a value between 00000000 and 99999999 and is in the flowIQ® 2101/3100
identical to the unique serial number.
In connection with secondary addressing, the M-Bus water meters are selected via the primary address 253 with its
8 byte long complete M-Bus ID consisting of:
• M-Bus ID number. Default from Kamstrup: The last 8 digits in the meter number / customer number (4 bytes)
• Manufacturer ID = ASCII characters ‘KAM’ for Kamstrup encoded to the value 2D2Ch (2 bytes)
• Version/generation ID number for MULTICAL® 21 = 34h (1 byte)
• Device type ID (1 byte)
These 8 bytes make up the secondary address of the M-Bus water meter. It is possible to replace the individual
bytes with wildcard characters. See chapter 5.3.4 for further information.
Selection of M-Bus water meter via secondary address
(and deselecting other M-Bus water meter):
•
As long as the M-Bus water meter is selected, it will reply to primary address 253, which is dedicated to secondary
addressing. The M-Bus water meter is deselected either by
• sending a new selection via primary address 253 with a secondary address – different from the one of the
M-Bus water meter (by means of which another M-Bus meter may be selected, if necessary)
or
• sending normalization (SND_NKE) to primary address 253.
Wired M-Bus
Water Meters flowIQ® 2101/3100 TECHNICAL DESCRIPTION
Kamstrup A/S · Technical Description · 55121944_A1_GB_08.2016
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5.3.3 Enhanced secondary addressing
Start character
68h
L-field
11h L-field
11h Start character
68h C-field
53h or 73h
A-field
FDh CI-field
52h ID No. LSB
37 or FF BCD
E.g. M-Bus ID number = 4118737
ID No.
87 or FF BCD
ID No.
11 or FF BCD
ID No. MSB
04 or FF BCD
Man. ID LSB
2Dh or FFh
KAM encoded to 2D2Ch
Man. ID MSB
2Ch or FFh
Version ID
flowIQ2101
1Fh Version ID
1Dh
Device ID
16 (cold water), 06 (warm water)
Record
0Ch DIF:
4 bytes, 8 digit BCD
Fabrication. no.
78h VIF:
Fabrication no. (serial no.),
e.g.: 2500176
Fabr. no. LSB
76 or FF BCD
Fabr. no.
01 or FF BCD
Fabr. no.
50 or FF BCD
Fabr. no. MSB
02 or FF BCD
Checksum
Xxh Stop character
16h
A valid secondary M-Bus address has a value between (M-Bus ID No. 00000000-99999999) / (M-Bus fabrication No.
00000000-99999999) and is, in the flowIQ® 2101/3100, identical to the unique serial number.
The M-Bus water meter secondary address can therefore be extended in order to comprise the 8 digit BCD
‘fabrication number’ (4 bytes) – identical with the serial number of the meter. This number is unique for each
flowIQ® 2101/3100 and cannot be changed after the meter has been produced.
In connection with enhanced secondary addressing, the M-Bus water meter is selected by adding ‘fabrication
number’ as an ordinary data record with DIF = 0Ch (for 4 bytes, 8 digit BCD) and VIF = 78h (for fabrication number)
in the selection telegram after the secondary address.
When a M-Bus water meter is selected via enhanced secondary address, it will reply to primary address 253, as it is
with the ordinary secondary addressing. The M-Bus water meter is deselected either by
• sending a new selection via primary address 253 with an enhanced or ordinary secondary address – different
from the one from the M-Bus water meter (by means of which another M-Bus meter may be selected, if
necessary)
or
• sending a normalization (SND_NKE) to primary address 253.
•
Selection of M-Bus water meter via enhanced secondary address (and deselecting other M-Bus water meter):
flowIQ 3100
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