Relay MR005DL User manual

M-Bus Display / Datalogger
MR005FA / MR005DL
MR006FA / MR006DL
M-Bus Remote Displays and Datalogger
for 3 or 20 Slaves
User Manual

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Table of content
1 Functional description...............................................................................................................3
2 Installation and startup..............................................................................................................4
3 Description of the Level Converter............................................................................................7
4 Description of the M-Bus Display..............................................................................................9
5 Keyboard operation.................................................................................................................10
6 Remote control with commands..............................................................................................15
7 Additional functions of the Datalogger.....................................................................................15
8 PC-Software FService.............................................................................................................16
9 Addendum...............................................................................................................................17
9.1 Error Codes...................................................................................................................17
9.2 Modem Configuration ....................................................................................................17
10 CE Declaration......................................................................................................................18
© Relay GmbH 2018
www.relay.de

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1 Functional description
•M- Bus data collecting station*
•Intervals: 1 minute to 1 year*
•Stores due-date values*
•Generates reading profiles*
•1, 2 or 4MByte FLASH memory *
•Remote display with filtering
•Remote access via 10-bit modem
•Software can be updated
•Level converter for 3 or 20 unit loads
•300..9600 baud
•Suppression of echo
•Short circuit protection
•Overcurrent protection
•Mountable on DIN rail
•External, flexible power supply
* only with MR00xDL
Ordering information and accessories:
Article. No.
MR005FA
Display and level converter for 3 meters
MR005DL
Display, datalogger and level converter for 3 meters
MR006FA
Display and level converter for 20 meters
MR006DL
Display, datalogger and level converter for 20 meters
Accessories
NT003
Plug-in power supply 12 VDC 500mA
NT013
Power supply 24 VDC regulated 15W for rail mounting (low profile)
KV002
USB 2.0 to RS232C Converter with drivers on CD
MOD001-DL20
Analogue10-Bit Modem configured for MR005(6)FA/DL
The standard memory size of the devices is 1 MByte. You can order more data memory by
adding the suffix –2M (for 2MByte) or –4M (for 4MByte).
This manual describes the M-Bus Display (MR005FA and MR006FA) and the M-Bus
Datalogger (MR005DL and MR006DL). All devices can be operated as transparent level
converters or as a remote displays with keyboard operation or remote control. The datalogger
models also offers the possibility to time-read the bus network and to collect the data in the
internal flash memory.
M-Bus
RS232C MODEM RS232C PC
Power
T1:001 12345678
A0: 4076.5 kWh

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2 Installation and startup
Connection plan:
RS232 PC: PC interface for service and level converter operation
RS232 MODEM: Modem interface for service and level converter operation
M-Bus: M+, M- M-Bus terminals (3 pairs). M-Bus devices are wired polarity independent in
parallel to the same line. The characters +, - mark only the different bus
lines.
Earth for symmetry of M-Bus
Power: V+ Power supply: positive terminal for DC (10..28VDC)
V- Power supply: negative terminal for DC
•Polarity independent for AC, 13..27VAC
•Please do not connect mains supply !!
LED lamp: The green LED is on if the power supply is connected and the
microcontroller is ready for operation.
M-Bus
RS232C MODEM RS232C PC
Power
T1:001 12345678
A0: 4076.5 kWh

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RS232 interface:
The M-Bus can be accessed by an RS232C interface. A PC should be connected to the right
DB9 socket or a modem to the left DB9 plug. Only one of these connectors can be used
simultaneously. You can attach a 1:1 serial cable to PC or the cable which was delivered with
your modem to the modem. The modem must be configured before it is connected (see
addendum: “Modem configuration”).
Pinning of DB9 connectors:
Pin
Socket
Plug
Usage socket
Usage plug
2
RXD
TXD
Transmit to PC
Receive from modem
3
TXD
RXD
Receive from PC
Transmit to modem
4
-
DTR
Unused
Always active
5
GND
GND
Ground potential
Ground potential
7
RTS
CTS
Handshake unused
Always active
8
CTS
RTS
Always active
Handshake unused
Pin 1, 6 and 9 are not connected
Simultaneous use of interfaces:
In case of a local readout using the keyboard of the remote display or during an automatic
readout the RS232 interfaces do not have access to the M-Bus. These functions can produce
temporary disturbances in communication. You should also know that the datalogger performs
no automatic readout of meter data during the operation by keyboard or serial interface.
Hints for installation:
•Write down the individual ID no. of the meters in the flats / real estates
•Configure the meters or pulse adaptors
•Configure the M-Bus Display / Datalogger (using keyboard or with the service software
FService on a Laptop or by Modem)
•Log in with the PasscodeB (predefined to: 00001767)
•Setup baud rates, search mode .. in the menu „Display config.“
•Start search for installed meters with „List of slaves - AutomaticSearch“
•Check the list of slaves for missing meters, you can add missing slaves manually if it is
necessary
•Change the predefined passcodes (at least passcode B)

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Trouble shooting:
•No LED is on:
Check power supply and fuse.
•Display shows “Status: overload”:
Check the M-Bus wiring for short circuits and ground loops. Defective slaves can also
produce an overcurrent. The source for the short circuit can be found easier by removing
some bus segments from the M-Bus terminals.
•One or more meters are not detected in automatic search procedure:
Retry automatic search. Check baud rate and address of this meter. You can manually add
the meter to the list of slaves and then perform a single readout of this meter.
•No reply from meter:
Check baudrate and address of this meter. Check the bus extension: The bus voltage must
be >24V at any slave. Temporarily remove other bus segment.
•„Status: Error“:
MR00xDL/FA in waiting status (inactive): Press and C keys simultaneously to view the list
of errors. Please note the error codes and then delete the error codes by pressing the key.
The most important error codes can be decoded using the table in the addendum.
•Wrong Passcode
Please do the following steps, if you have forgotten the passcode:
Do the actions which are described in “Status: Error” and then press the key again.
Please write down the 16 digit string (display config) and send it together with the firmware
version no. and serial no. to [e-mail] by email. We will send you a working
passcode.

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3 Description of the Level Converter
Function:
The RS232C interface signals are directly connected to the M-Bus all the time except during the
operation by keyboard, the remote access using the command menu and the automatic readout.
External connected controllers (laptop, building control systems etc.) can use the device during
the inactivity as a level converter for the physical layer of the M-Bus. The software of the
controller must provide the communication protocols of the connected meters. The members of
the MR005 family are able to supply up to 3, the members of the MR006 family up to 20 slaves
(unit loads) with power.
Technical Data
Supply: Voltage: 10..28VDC, 5W
13..28VAC, 9W
Environment: Operating temperature: 0..+45°C
Storage temperature: -10..+60°C
Humidity: 10..70% (non condensing)
Housing: Dimensions: W x H x L = 105 x 94 x 58 (mm)
Protective class: IP20
Material / colour: Noryl / light-grey (similar to RAL 7035)
Weight: 0,23kg
M-Bus specifications
Parameter
min.
Typ.
max.
Einheit
Max. no of unit loads (slaves): MR005FA/DL
3
Max. no of unit loads (slaves): MR006FA/DL
20
Internal resistance
100

Bus voltage mark (@ 0mA)
29.0
30.5
32.0
V
Voltage drop for space = log. 0
12
12,5
13
V
Level for overcurrent interruption
50
60
70
mA
Level for bit detection from slave
7
mA
1 unit load = 1,5mA

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Planning M-Bus networks:
Two effects must be considered before projecting M-Bus networks:
1. The signals must not be distorted to much by the influence of the capacitance of the
cable. The capacitance of the network depends on the length of the network, this means
the total sum of cable length. Lower baudrates allow a higher bus capacity.
2. Each meter must be supplied by the M-Bus with a minimum voltage of 24V. The voltage
drop on the bus line is caused by the transmit current of the communicating slave of up
to 20mA, the supply current of the slaves in the respective bus segment, the internal
resistance of the M-Bus master, the resistance of the cable and the connection
resistances of the joints. The distance between a slave and the master is inverse
dependent on the number of slaves in this segment and on the cable diameter.
The maximum allowed resistance of the cable can be estimated:
The calculation for a standard phone cable JYSTY nx2x0.8 (75/km, 150nF/km) presents the
following values:
Baudrate
9600 Baud
2400 Baud
300 Baud
Max. total cable length (@150nF/km):
1 km
4 km
12 km
No. of unit loads in the
respective segment
Max. distance to the meter (@75/km)
Equally distributed
slaves at end of cable
3
4.0 km
4.0 km
20
2.5 km
1.5 km
There are remote repeaters (our art.no. DR007 or PW250) available for extending the network
length and the number of connected slaves. Cascading these remote repeaters allows a nearly
unlimited bus extension. The place in which a remote repeater is placed must provide a mains
supply.
Shielding
Tests showed the result that a shielding of the M-Bus cable is not necessary. Please avoid a
connection between any of the bus lines to the shielding or protective ground.

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4 Description of the M-Bus Display
Function
The M-Bus Display allows reading the meters using the keyboard and viewing the consumption
values on the LCD. The meter reader is then able to get the data of many meters from one
central location without the need to enter all the flats and without further technical equipment
(laptop). Additionally the device offers a so-called command mode for remote readout of meters
using a standard modem (10-bit). The M-Bus software DokomCS and FService support this
command mode.
Installation
After login with a passcode (predefined as 00001767) the operator gets access to the menu
system, which is described later. It is important to generate the list of meters for readout of data.
The automatic search for installed meters will be much faster, if the user reduces the search
options in search mode or search baudrates (e.g. searching with 300 baud is very slow). These
options can be selected in the menu „Display config.“ You should also change passcode B to
prevent other persons from changing the setup and passcodes.
Error messages
An exceed of the maximum allowed current and short circuit are signalled with LEDs under the
terminal lid compartment and also on the LCD. If there are problems with interpretation of the
M-Bus data the display shows „Status: Error“. The “list of errors“ is shown on the LCD after
simultaneously pressing the and C keys in the inactive state. Please note the error codes and
then delete the error codes by pressing the key. The most important error codes can be
decoded using the table in the addendum. On restart after power fail the error list is also deleted.
Passcode protection
The M-Bus Display distinguishes between 3 passcode modes and 2 passcode levels:
The operator is requested to enter a passcode after pressing any key in the standard mode
(mode A). In this mode the passcode A (reader´s passcode) gives only low level access
limited to readout functions. The caretaker or tenant can read single meters by selection from
the list of slaves or all meters from the network. It is not possible to change the list of slaves or
other options of the M-Bus Display here.
The login with the passcode B instead of passcode A gives access to the complete menu. On
delivery the predefined value for passcode A is 00000000 and for passcode B is 00001767.
This allows a simple login to level A by just pressing the E-key. We strongly recommend to
change passcode B to avoid manipulation by unauthorized persons. You can setup the
passcode from the menus „Display config. – New passcode A” and “Display config. – New
passcode B”.

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Access by ID: The M-Bus Display supports a different setup of the passcode mode from the
menu „Display config. – Passcode mode“. If this mode is activated, the user (tenant) can make
a readout limited to his own meter(s). After first key-press the tenant is requested to type in the
ID (identification no.) of the required slave. Afterwards this single meter is read and its data
displayed. Please note that only meters which support secondary addressing are readable in
this mode. The access to the menu is possible in this mode after input of the ID 00000000 and
login with the described passcodes.
Access by Adr: This mode allows a direct readout of meters using their primary addresses
without any login procedure. This mode is similar to “Access by ID”. The primary address for
global readout 254 is used by default. So by just pressing the E key you can read a meter if
there is only one meter connected. The cursor keys allow editing the address. You can leave
the input mask and step to the passcode request by pressing the key three times.
5 Keyboard operation
Basics:
Besides the control using FService the device includes 4 keys and a backlighted display for
comfortable, local access to all functions. The buttons give a very precise, mechanical feedback
and each input is acknowledged by an acoustic signal (beep). Execution of menu entries and
input of numbers are described later. The device automatically returns to inactive state after
some minutes without input.
Selection of a menu entry:
An arrow marks the active menu entry on the LCD. The arrow is moved down with the key
(black) and up with the key (grey). Pressing the E button (blue) executes the currently
selected menu entry. The C button (red) cancels the input and exits from the menu.
key
Input of numbers:
The button increments the number of the active position by one. After the 0 it restarts with the
9 again. The key moves the cursor to the next position on the right. The active position is
blinking. After pressing at the most right digit the cursor moves to the most left digit. The E
button ends and acknowledges the input regardless of the current position. You can cancel the
input with the C key.
After input of passcode and confirming with the E key the main
menu is activated. You can always see two entries of this
menu. The first displayed lines are “Readout of all” and “Single
readout”. By pushing the button the LCD scrolls to the next
part of the menu. In this example the line “Single readout” will
then be marked with the arrow. This submenu would be entered
by pressing the E key.

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Displayed data:
The device only displays the most important data for reasons of easy interpretation and not to
confuse the reading staff. Some meters offer actual and historical values, different tariffs and
additional devices like pulse counters in a heat meter. The first row always shows the primary
address and ID for a clear association of the data to the respective meter. The first two
characters in this row give information about the tariff.
The second row displays the due-date or the data with physical unit. The first two characters
show information which distinguishes between the different values:
The character “A” marks current values which are characterized by storage no. 0. The character
“B” appears with due-date values (storage no. 1). If the respond frame of the slave contains
activated temporary or permanent error bits in the Status byte, an “E” will be shown. The first
character follows one digit for the device (0 = main device).
Filtering data:
To make the readout of data easy the device only displays the most important values of the
meters. Only the first respond telegram after initialization with SND_NKE is supported. The data
is limited to tariff 0 to 3, device 0 to 7, storage no. 0 and 1 and function “instantaneous”. The
marking of these values is described above.
The energy, volumes, temperatures (flow, return, differential), volume flow and power are
displayed if they are included with the respond frame. The limitation is derived from accepting
only the VIF´s $00 ..$1F, $58..$63 and $6E. These are the following basic units and additional
power of tens: Wh, J, l, kg, W, l/h °C and HCA. Also available points of time are supported. A
maximum number of 30 entries can be viewed from one meter.
A: current value (storage no. 0)
B: due-date value (storage no. 1)
E: value with error flag
digit: no. of device
counter reading with unit
primary address meter ID tariff no.

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Menu structure:
Page 2
Page 2
Status report:
OK: Device ready for work
overload: Nominal bus current exceeded
max.load: Bus off while over current
error: Error occured in data interpretation
Show/edit list
AutomaticSearch
Add slave
Remove slaves
Sort slave list
Readout of all
Single readout
List of slaves
MB Display V1.9
Status: OK
Passcode request *
Passcode B allows access to all functions
Passcode A allows access limited to these functions:
Shows the list of slaves. Allows editing of:
Primary address, ID and baudrate
The meter data of all devices are read and displayed
on the LCD based on the list of slaves.
After selecting a meter from the list of slaves this slave
will be read and the consumption values will be displayed.
Automatic generation of the list of slaves by a search
for ID / primary address with several baudrates
Append a meter to the list of slaves
Remove a meter from the list of slaves
Selectable option for sorting the list of slaves:
primary address, ID, no sorting
* The tenant has no access to the menus in the modes "Access via
ID" / "Access via Adr". He is requested to input a meter ID / Adr
instead of a passcode.

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Page 1
Page 1
Lowest baudrate
Data collector
Highest baudr.
Passcode mode
New passcode B
Clock&Calendar
New passcode A
Display config.
These menus are only available with MR00xDL:
Read and store
Search mode
Modem mode
Testfunctions
ID of location
Data exchange
SND_NKE mode
MWh_cbm mode
Display and edit date + time. Press E-key for editing.
Format: DD.MM.YYYY
Setting up readout interval and start time.
Format: DD.MM.YYYY
Shows the ID of location (description)
Change of passcode B (global access)
Selects passcode mode:
Standard: requests passcode on startup
Access by ID/Adr: requests ID/address for single read
Manually starts a readout and storage of all meters
according to the list of slaves
Highest baudrate for automatic search
Lowest baudrate for automatic search
Change of passcode A (reader)
Selects search mode: Adr+ID,only Adr, only ID
Setup of modem mode
Testfunctions for production (passcode protected)
Display of stored data:
First select a timepoint from the list. Then all data of
this point of time are shown on the LCD.
Activate / deactivate initialize with SND_NKE
Activate / deacivate preferred display in MWh / cbm

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Description of the most important menus
Readout of all:
This entry reads all meters according to the list of slaves and displays their data. For each
meter its baud rate and primary or secondary address is used for communication.
Single readout:
The readout of single meters also uses information from the list of slaves. The submenu shows
the list with the information of position, primary address and ID. The meter will be read after
moving the cursor to the desired position and pressing the E button.
Automatic generation of the list of slaves:
The automatic search for installed meters with generation of the list of slaves is started from the
menu entry “List of slaves – AutomaticSearch” with the E key. The C button cancels the current
part of search and jumps to the next search step. Especially searching with 300 baud takes
much time. You should select just the needed baudrates from the menu “Display config. –
Highest baudrate / Lowest baudrate” to avoid unnecessary long search times. It is also possible
to limit the search to primary or secondary address using the menu “Display config. – Search
mode”. At the end of the search the display shows the number of detected meters. You should
check the entries of the list of slaves from the menu “List of slaves- Show/edit list”.
Editing the list of slaves:
The entries in the list of slaves can also be edited by the user using the menu “List of slaves –
Show/edit list”. Move the cursor to the desired position and start the edit mode with the E key.
You can change the chars with the button and step to the next position with the button. The
E key confirms and the C key cancels editing. The changes affect only the list of slaves, but not
the meter options itself. Editing entries is useful if a meter has been exchanged. It is also
possible to add new meters from the meu “List of slaves – Add slave” or to delete single meters
from the submenu “– Remove slaves”.
Setup of baud rates:
On delivery the M-Bus Display / Datalogger is configured to search with all supported
baudrates: 300 and 2400 bd. You can accelerate the search procedure by limiting the search
baudrates with “Display config. – Highest baudrate” and “Lowest baudrate” .
Implemented elements of protocol and data types:
The device includes no meter-specific interpretation, but accepts all meters with a M-Bus
telegram according to the documentation of the M-Bus Usergroup and the European standard
EN1434-3, which meets the following demands:
•Variable data structure (mode 1) or fixed data structure (mode 1 or mode 2)
•Number formats: Integer (8bit, 16bit, 24bit, 32bit, 48bit, 64bit)
Real (32bit)
BCD (2digit, 4 digit, 6digit, 8digit, 12 digit, 16digit)

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6 Remote control with commands
Function
In the inactive state the MR00xFA and MR00xDL work like simple level converter. The signals
of the RS232C and RS485 interfaces are converted to M-Bus signals and vice versa. The CPU
watches the data transmission and reacts on certain control frames. Following a successful
login command the device switches itself from level converter mode to command mode. Then
the device can directly be controlled with a PC or via modem using the RS232C interface. This
command mode includes reading single meters, downloading all stored data, configuration and
even an update of the software. The document “W60CMxxE.PDF” (xx = version) describes all
commands for development of adapted readout software. The following documentation
describes our software FService for configuration and remote control of MR00xDL and
MR00xFA.
Operation with modem
The M-Bus protocol uses an 11-bit format with very critical timing requirements. The modems
which are nowadays available on the market don´t support this format. Therefore we offer a
special solution called “M-Bus modem” for use with any level converter and also with
MR00xDL/FA in level converter mode.
In spite of this the command mode makes use of standard modems with 10-bit format. There
are two programs which support communication to MR00xDL/FA using commands: FService
and DokomCS (under preparation).
7 Additional functions of the Datalogger
Functionality
The Datalogger MR00xDL software offers a scheduler for time-triggered readout and storage of
M-Bus data. The scheduler distinguishes between two modes:
a) Readout in fixed periods from one minute to one week
b) Readout at fixed points of time (e.g. at end of each month)
On automatic readout the Datalogger reads all meters which are included in the list of slaves.
The first respond telegram after a SND_NKE + REQ_UD2 is stored together with the readout
time into the FLASH memory.
Selecting readout time
The readout time can be selected using the keyboard and LCD or by remote access with a PC
or via a modem. The following selections are possible via keyboard:
•1, 2, 3, 5, 10, 15, 20, 30 minutes interval
•1, 2, 3, 4, 6, 12 hours interval
•once per day, once per week, twice per week, once per month
•4 times per year, 2 times per year and once per year
•0 times per year = logging function deactivated

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Calculation of storage capacity
The size of the data memory is 1MByte, but optionally 2MByte or 4Mbyte are possible. In the
worst case the M-Bus frame can be 261 bytes long, but mostly the telegrams are much shorter.
A typical heat meter for example transmits 79 bytes. Water meters and pulse adaptors often use
even shorter frames. Additionally a length field and a point of time is stored with the M-Bus
frame. This adds 12 Bytes. In our example 20 heat meters with 79 bytes M-Bus frame + 12
bytes occupy 1820 bytes inside the FLASH for every readout. The FLASH is organized as a ring
memory with 16 blocks of 64kB (65536 bytes) or in total 1MB. If the current block is full, the next
block will be erased completely. So it could happen that only 15 block are full with data. In this
example there is enough memory to store minimum 15 x 65536 / 1820 = 540 readouts. The
practice shows that usually there are often installations with less meters and shorter M-Bus
telegrams.
Download of stored data
The contents of the data memory can be downloaded in command mode using a direct or a
modem connection with FService or DokomCS.
The most current readouts are also available via keyboard and LCD. The menu “Data exchange”
shows a list with the last 25 readout times. You can scroll through the different points of time
and select one with the E button. Then the data of all meters for this readout is displayed in the
same manner as with “Readout of all”.
8 PC-Software FService
The devices can be operated via keyboard without software or as simple level converters with
any M-Bus software. The software FService offers a comfortable access to and control of the
Datalogger and M-Bus Display. The software can work locally with a PC or remotely via a
modem.
The software FService is described in a separate manual, which is delivered with FService. You
will find this free software on the CD "Tools & Docs" and on our homepage www.relay.de.

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9 Addendum
9.1 Error Codes
The following table shows the error codes. See “Error fixing – Status: Error”:
Code
Error
$00
No error
$01
RAM error (please send the device to us for repair)
$11
EEPROM write problem
$18, $19, $1C
EEPROM read problem
$20
Problem with communication to real time clock
$30, $31, $32, $33
Problem with FLASH memory
$51,$52
Problem with data in real time clock
$61, $62
Problem with YModem transmit , Xmodem reception
9.2 Modem Configuration
You must configure the modem before it is connected to MR00xFA or MR00xDL. Please use a
terminal software of your choice, e.g. the Windows HyperTerminal and connect the PC to the
modem. Choose 9600 baud, 8 data bits, no parity and one stopbit. Then input the following
commands and activate each with the “Enter” key:
Command
Function
AT
for baudrate detection
AT&F
load factory settings
AT&D3
resets modem after DTR signal off
ATS0=1
modem answers a call after one ring
AT\Q0 or AT&K0
deactivate hardware and software handshake
AT\J0
no adaption of the serial baudrate to line speed
AT&W0
stores the settings into profile 0
AT&W1
stores the settings into profile 1
These commands are examples, which will work with several, but not all modems on the market.
Please study the manual of your individual modem to find out whether you need to use modified
commands.
After configuration please connect the modem to the MR00xFA/DL using the cable delivered
with the modem and plug it into the DSUB labelled with “MODEM”.

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MR005FA+DL / MR006FA+DL
10 CE Declaration

User Manual MR005FA+DL / MR006FA+DL ·04/2018 · VERSION 1.4
19
MR005FA+DL / MR006FA+DL
Notes: