Kamstrup M-Bus Parts list manual

Technical Description
Kamstrup A/S
Industrivej 28, Stilling
DK-8660 Skanderborg
TEL: [phone]
FAX: [phone]
E-MAIL: [email protected]
WEB: www.kamstrup.com
M-Bus

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Contents
1. Technical description M-Bus 5
Introduction 5
2. M-Bus System 7
M-Bus system components 7
Communication 7
Addresses of M-Bus Slave units 7
Operation 7
3. M-Bus Master 9
4. M-Bus Slave to MULTICAL®11
5. M-Bus Slave for MULTICAL®Compact 13
6. M-Bus Slave for Kamstrup 182/382/351 15
7. M-Bus Cascade module 17
8. M-Bus Modem 19
Test 19
9. Installation of M-Bus 21
Cable length 21
Mounting 21
10.Data reading of M-Bus 23
Data reading of heat meters 23
M-Bus Slave for MULTICAL®III/MULTICAL®23
M-Bus Slave for MULTICAL®Compact 23
Data reading of Kamstrup 182/382/351 24
M-Bus Slave for Kamstrup 182/382/351 24
Reading equipment 24
11.Protocol 25
Commands 25
The individual commands in detail 25
M-Bus Master to M-Bus Slave 25
M-Bus Slave to M-Bus Master 26
Communication process 28
Reading of fresh data through e.g. data logging 29
M-Bus Slave and foreign masters 29
Appendix 29
Physical properties 35

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1. Technical description M-Bus
Introduction
This document describes the use of Kamstrup’s
M-Bus system.
M-Bus is used for electronic reading of district heat
meters.
As the data route from meter to accounting pro-
gram is electronic, the data is secured against er-
rors. It is easy and simple to equip Kamstrup en-
ergy meters with an M-Bus Slave, which is inserted
at the modular space in the energy meter. It is un-
necessary to program the integrating energy meter
or the M-Bus Slave as the system is self-configur-
ing.
Computer placed at the utility
M-Bus Master
Heat meters with
M-Bus Slave

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2. M-Bus System
M-Bus system components
The M-Bus system consists of the following ele-
ments:
nM-Bus Slave
nM-Bus Master
nM-Bus Cascade module
nM-Bus Modem
nCommunication software PcM-Bus
nCommunication software PcModem
nCommunication software PcLink
nIR head for reading
nCabel for reading
The M-Bus Master is built-up as a repeater, which
converts signals from e.g. RS232 to M-Bus format
(18-30 V/0-20 mA). The M-Bus Master has been
constructed to function together with Kamstrup’s
M-Bus Slaves and Kamstrup’s reading software.
The M-Bus Master can supply up to 40 M-Bus
Slaves at the power consumption of 1.5 mA
(1 Unit Load) per M-Bus Slave.
One or more M-Bus Cascade modules can be in-
stalled, and can comprise up to 250 M-Bus Slaves.
Communication
The communication on the M-Bus consists of volt-
age modulation from M-Bus Master to M-Bus Slave
(30 - 18 V) as well as current modulation from
M-Bus Slave to M-Bus Master (0 - 20 mA) through
an ordinary two-wire cable.
The M-Bus system has been constructed to ob-
serve the regulations of the EN 1434-3.
The communication on the M-Bus system is asyn-
chronous serial bit transmission (EN 60870-5-1) in
half duplex mode, i.e. the communication consists
of 1 start bit, 8 data bits, 1 parity bit (even), 1 stop
bit.
The transmission speeds are 300 baud or 2400
baud.
Addresses of M-Bus Slave units
If the M-Bus system is to function with a number of
connected M-Bus Slaves, each M-Bus Slave must
be given an identification number (address). This
is done via MULTICAL®, which contains a unique
customer number to the M-Bus Slave. The unique
address of the M-Bus Slave is equal to the last 3
digits of the customer number. The address can be
re-programmed either by means of the hand-held
terminal, MULTITERM, or the verification program
of METERTOOL.
The M-Bus Slave automatically reads MULTICAL®’s
number in connection with start or initialisation.
The address must lie between 1 and 250.
If the last three digits of the customer number ex-
ceed 250 (e.g. 345) the first digit will be ignored
and the ID number of the M-Bus Slave will only be
determined by the two last digits (e.g. 45).
Each M-Bus Slave must have its own address.
The M-Bus Master always sends a message on the
bus to a given address, which is encoded in the
message (the format). Only the M-Bus Slave in
question will reply.
If several M-Bus Slaves have the same address a
collision will arise, when the M-Bus Slaves reply to
the M-Bus Master.
However, there are two special addresses, which
function as follows:
Address 254:
All M-Bus Slaves will answer to this address. The
address must solely be used in systems with only
one M-Bus Slave connected, e.g. for test.
Address 255:
No M-Bus Slave will answer to this address, but all
M-Bus Slaves will receive the message. This mes-
sage makes it possible e.g. to change the baud
rate of a whole system at a time, only by sending a
format from the M-Bus Master.
If 3 systems are available each with 250 M-Bus
Slave modules, the number system is build up as
follows:
1st. system:
The energy meters are programmed with customer
numbers from 1001 to 1250.
2nd. system:
The energy meters are programmed with customer
numbers from 2001 to 2250.
3rd. system:
The energy meters are programmed with customer
numbers from 3001 to 3250.
Operation
It is optional whether the M-Bus Master is to be
permanently switched on, or the bus system is to
be switched off when not in operation (reading).
The M-Bus system cannot supply the MULTICAL®
integrating units. Only the M-Bus Slaves are supp-
lied from the M-Bus Master.
In connection with start-up the M-Bus Master will
have an initialization time of approx. 5 sec., and
the overload diode will light. After the 5 sec., the
diode will switch off and the M-Bus Master is
ready. In addition, the initialization time of M-Bus
Slaves is approx. 9 sec., before data can be ac-
quired, and if mounted in MULTICAL®III. However,
if the M-Bus Slaves are installed in MULTICAL®the
initialization time is approx. 12 sec.
The initiation time for Kamstrup 182/382/351 is
typically 7 seconds.
Rarely, a longer initiation time might be necessary -
see Appendix.
In case the bus system is turned on constantly,
these initialization times will only appear in con-
nection with installation.

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3. M-Bus Master
Two versions of the M-Bus Master are available.
One with a display and one without, however, they
function in the same way.
The M-Bus Master is built-up with supply print,
connection print and main print.
Furthermore the bracket has room for an extra
module - see paragraph 7 and 8.
The main print is placed at the top of the case, and
except from transformator, bridge connection and
connection terminals everything is mounted on
this print.
The front plate has four light emitting diodes with
the following indications:
Power:
Indicates that the M-Bus Master is supplied with
power
Overload:
Indicates that too much power is drawn from the
bus. I.e. either a short-circuit or too many M-Bus
Slaves connected to the M-Bus Master.
Request:
Blinks when data are sent from M-Bus Master to
M-Bus Slave.
Data:
Blinks when the M-Bus Master receives data from a
M-Bus Slave.
The M-Bus Master is no intelligent unit, but a re-
peater, which converts a RS232 or an optical for-
mat to the M-Bus format.
M-Bus format means:
From M-Bus Master to M-Bus Slave is:
mark »30 V
space »18 V
There has to be at least 12 VDC between mark and
space.
From M-Bus Slave to M-Bus Master is:
mark = closed current
space = closed current + approx. 17 mA.
The M-Bus Master can send and receive at 300 or
2400 baud both over the optical connection possi-
bility and over the data output in the bracket which
can be connected direct to RS232 by means of an
adapter cable.
The only difference between the two M-Bus Mas-
ters is that M-Bus Master with a display makes it
possible to read data from all heat meters con-
nected, and a computer for reading of data is not
necessary.
Following heat meter data can be read on the dis-
play:
1. For all heat meters
- Info code
- Energy
- Volumen
-InA
-InB
- Target date
2. For each individual heat meter
- Target energy
- Target volume
- Flow temperature
- Return temperature
-Dt, power and flow
For further information - see the M-Bus Master
manual.
M-Bus Master without display
M-Bus Master with display
Order numbers:
M-Bus Master without display 66-98-11x-xxx
M-Bus Master with display 66-98-A1x-xxx
M-Bus Master manual 5511-185
x= module options (see paragraph 7 and 8)
xxx = Country code - is filled in by Kamstrup A/S

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4. M-Bus Slave to MULTICAL®
The M-Bus Slave is built-up as a module, which fits
directly into the integrator bracket of MULTICAL®.
The M-Bus Slave has been specially constructed
for MULTICAL®.
The M-Bus Slave is supplied via the M-Bus Master,
and there is a galvanic decoupling to MULTICAL®,
which cannot be supplied over the M-Bus Master.
The M-Bus Slave is equipped with either two extra
in/- or outputs, to facilitate remote data acquisi-
tion from other meters, e.g. water meter or to read
out the energy and volumes pulses from the meter
itself.
The M-Bus Slave is an intelligent unit with its own
processor and RAM.
The M-Bus Slave automatically collects data from
the heat meter every 12 hours. Furthermore, data
is collected from the heat meter at reset/start and
when data has been sent from the M-Bus Slave to
the M-Bus Master.
The M-Bus Slave is reset by decoupling the M-Bus
system for some time (minimum 1 min.).
The M-Bus Slave can also be initiated from the
M-Bus Master by sending the format SND_NKE. Ini-
tialization means that the internal counters are re-
set and data are collected from MULTICAL®.
For the creation of M-Bus data packs the M-Bus
Slave uses the codings of MULTICAL®(A-B-CCC).
If the coding cannot be found in the M-Bus Slave
an error message appears which means that the
decimal point will not be correctly placed in the
M-Bus data pack.
Each M-Bus Slave has a maximum current con-
sumption of 1 Unit Load (1.5 mA).
Rin = 410 W, Cin = 1 nF.
Pulse inputs Pulse outputs
Terminal 24-25 (M-Bus) M-Bus connection
Terminal 65-66 (input A) Pulse input A
Terminal 67-68 (Input B) Pulse input B
Terminal 24-25 (M-Bus) M-Bus connection
Terminal 16-17 (CE) Energy pulse
Terminal 67-68 (CV) Volumen pulse
Order numbers:
M-Bus Slave for MULTICAL®III with pulse inputs 66-04-000-100
M-Bus Slave for MULTICAL®III with pulse outputs 66-07-000-100
M-Bus Slave for MULTICAL®with pulse inputs 66-08-000-100
M-Bus Slave for MULTICAL®with pulse outputs 66-09-000-100
There is a difference between the M-Bus Slaves for MULTICAL®III and MULTICAL®.
MULTICAL®transmits a larger amount of data. Please refer to paragraph 10: Data acquisition of M-Bus.

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5. M-Bus Slave for MULTICAL®Compact
Terminal 24-25 (M-Bus) Connections
Terminal 65-66 (Pulse) Not in used
The M-Bus Slave is a module especially developed
for MULTICAL®Compact, and is easily installed in
the modular space of the MULTICAL®Compact.
The M-Bus Slave is an intelligent unit with a pro-
cessor and RAM of its own.
The M-Bus Slave for MULTICAL®Compact is identi-
cal with the one for MULTICAL®III, except from the
physical dimensions. However, the M-Bus Slave for
MULTICAL®Compact is not equipped with pulse in-
puts or outputs.
Each M-Bus Slave has a max. power consumption
of 1 Unit Load (1.5 mA).
Rin = 410 W, Cin = 1 nF.
Data is automatically read every 12 hour
- see paragraph 10. Data reading of M-Bus for
further information.
Module area in MULTICAL®Compact
Display
Module area
Battery
Order numbers:
M-Bus Slave for MULTICAL®Compact 66-0S-000-100

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6. M-Bus Slave for Kamstrup 182/382/351
Terminal 24-25 (M-Bus) Connections
Terminal 65-66 (Pulse) Pulse input
M-Bus Slave
mounted in an electricity meter
The M-Bus Slave is especially developed for
Kamstrup 182/382/351, and is easily installed in
the modular space of the electricity meter.
The M-Bus Slave for electricity meters is equipped
with a pulse input.
The physical dimensions are identical with those
of the M-Bus Slave for MULTICAL®Compact, how-
ever, it cannot be used for a MULTICAL®Compact.
The M-Bus Slave is an intelligent unit with a pro-
cessor and RAM of its own, and it automatically
finds out in which meter type it is placed.
Data is automatically entered every hour -
see paragraph 10. Data reading of M-Bus for
further information.
Rin = 410 W, Cin = 1 nF.
The power consumption of each M-Bus Slave is
1 Unit Load (1.5 mA).
Order numbers:
M-Bus Slave for Kamstrup 182/382/351 6850-005

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7. M-Bus Cascade module
The Cascade module can be used to increase the
number of M-Bus Slaves in an M-Bus network from
40 to max. 250 M-Bus Slaves. Furthermore, the ca-
ble length can be multiplied by six by using six
Cascade modules mounted in M-Bus Master units.
The Cascade module is mounted in an M-Bus Mas-
ter and needs neither set-up nor address.
The function of the Cascade module is to repeat
communication to and from the M-Bus Master.
M-Bus is a local network which makes it possible
to communicate with and read energy meters from
a centrally placed M-Bus Master. A network can in-
clude from one to 250 M-Bus Slaves as required.
A new M-Bus Master with Cascade module is to be
connected to an already existing network parallel
to one of the connected MULTICAL®energy meters
with M-Bus Slave. From the new M-Bus Master a
new network with 38 energy meters and 1 Cascade
module or 40 M-Bus Slaves can be established.
It is possible to connect up to 6 M-Bus Masters
and thereby increase the number of energy meters
in the network to a total of 250 meters (primarily
addressing).
Each Cascade module has a power consumption of
2 Unit Loads (3 mA).
Rin = 410 W, Cin = 1 nF.
Extra cable length per unit:
- Max. 1.800 m to the most remote M-Bus
Slave/0.8 mm2.
M-Bus interface
(53, 54).
To this the M-Bus
Slaves are con-
nected.
Input A (65, 66),
Input B (67, 68).
- Are not in use.

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The number of M-Bus Slave modules/cable length as a function of the number of Cascade units in a
Kamstrup M-Bus system.
M-Bus
Master
Cascade unit =
1 Cascade module +
1 M-Bus Master
Total numbers of M-Bus Slaves Total cable length
0.5/0.8 mm2
10
40 1000/1800 m
138+40=78 2000/3600 m
238+38+40=116 3000/5400 m
338+38+38+40=154 4000/7200 m
438+38+38+38+40=192 5000/9000 m
538+38+38+38+38+40=230 6000/10800 m
638+38+38+38+38+38+22=250 7000/12600 m
Tabel 1
Order numbers:
M-Bus Cascade module 66-98-001-100
1= module number

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8. M-Bus Modem
An M-Bus system of up to 40 meters can be read
via the M-Bus Modem.
The M-Bus Modem can be mounted in both M-Bus
Master without a display and M-Bus Master with a
display.
Test
1. When the modem has been installed, the line
voltage must be measured on clamps 70 and
71. It must be min. 24 VDC.
2. Remount the top of the M-Bus Master.
3. Make a manual call.
M-Bus Master without a display
Keep pressing the key for min. 10 seconds. The
modem module calls the utility at the entered
number.
M-Bus Master with display
Keep pressing both keys for min. 10 seconds,
until a “Call” appears in the display. The mo-
dem module calls the utility at the entered
number.
The M-Bus Modem is read via the receiver software
of PcModem, but uses the same database as the
PcM-Bus.
When the call has been made we recommended
you to call the utility to ensure that the call has
been registered by the system software.
Two telephone numbers can be entered into the
M-Bus Modem:
nTelephone number 1:
The data number for remote reading.
nTelephone number 2:
An alternative data number for remote reading.
Each number can contain 24 digits.
The M-Bus Modem can be programmed to make
calls directly and not via a PABX switchboard ac-
cording to the “0 - Pause - dialling tone” method.
For further information please refer to:
nThe M-Bus Master manual
nThe M-Bus Modem installation guide
nThe PcModem manual
Order numbers:
M-Bus Modem module 66-98-002-319
2= module number
The line voltage is measured
here.

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