Metro DataVac MB-RS User manual

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MB-RS
Master module for M-Bus network
User’s manual

Version 1.0
1. TABLE OF CONTENTS
1.TABLE OF CONTENTS ___________________________________________ 2
2.FOREWORDS __________________________________________________ 3
3.INTRODUCTION ________________________________________________ 5
3.1.PRODUCT PRESENTATION ........................................................................ 5
3.2.CARACTERISTICS ........................................................................................ 5
3.2.1.MAIN TECHNICAL CHARACTERISTICS ............................................... 5
3.2.2.DIMENSIONS AND INSTALLATION ...................................................... 6
3.2.1.CONTAINS OF THE PACKAGING ......................................................... 7
4.CONNECTORS _________________________________________________ 8
4.1.1.THE RS232 COMMUNICATION PORT .................................................. 8
4.1.2.THE USB FULL-SPEED CONNECTOR ................................................. 9
5.COMMUNICATION - ASCII PROTOCOL ____________________________ 10
5.1.1.IDENTIFICATION OF THE MBUS MODULES ..................................... 10
5.1.2.COMMANDS FOR READING THE PROBES ....................................... 13
5.1.3.MB-RS VERSION ................................................................................. 14
5.1.4.INPUTS/ OUTPUTS (MB-IO MODULES) ............................................. 14
5.1.5.RESOLUTION OF A MODULE FOR TTL PROBES ............................. 17
5.1.6.RESET THE COUNTER OF THE MODULES FOR TTL, 1VPP OR 11µA
PROBES ........................................................................................................... 17
5.1.7.STEP AND INTERPOLATION OF AN INCREMENTAL PROBES 11µA
OR 1VSS .......................................................................................................... 17
6.MODBUS RTU COMMUNICATION PROTOCOL ______________________ 18

2. FOREWORDS
ONE YEAR LIMITED GUARANTEE FOR THE MB-RS
MANUFACTURER'S RESPONSIBILITY
SPARE PARTS AND LABOUR.
The manufacturer commits himself to pay for repair or replacement costs (labour
costs included) during a period of one year as from the date the guarantee came into
force. The spare parts can be new or renovated and are guaranteed until the end of
the initial guarantee period.
FIRST END-USER COVERAGE.
This guarantee applies only to the first end-user of the product and is not assignable
to any other subsequent purchaser or user.
RESTRICTIONS.
Any accessory or expansion item not included in the original factory packaging is not
guaranteed.
The present guarantee does not cover: installation or repair costs, damages resulting
from circumstances beyond the manufacturer's control like damages following acts of
God, misuse, or careless mistake from the user, damages during the transport or due
to a wrong installation, use or application, such as any material damage caused by
the use of non supplied products, components or accessories. It also does not cover
products modified without any written approval from the manufacturer, including
electrical or mechanical modification, removal of serial numbers or of the
manufacturer's trademarks or of any other identification.
THE SOLE RECOURSE UNDER THIS GUARANTEE SHALL BE THE REPAIR OR
THE REPLACEMENT OF DEFECTIVE PARTS AS INDICATED ABOVE. UNDER
NO CIRCUMSTANCES THE MANUFACTURER CAN BE HELD LIABLE FOR
INDIRECT OR SPECIAL DAMAGES OR FOR DAMAGES RESULTING FROM THE
USE OF THE PRODUCT, INCLUDING ANY LOSS OF DATA, BUSINESS OR
PROFIT, AND WHETHER THESE DAMAGES CAN BE FORESEEN OR NOT AND
WHETER THEY ARE BASED ON A GUARANTEE VIOLATION OR NOT.
THE PRESENT GUARANTEE REPLACES ANY OTHER EXPRESSED OR IMPLIED
GUARANTEE INCLUDING BUT NOT LIMITED TO ANY GUARANTEE OF
MARKETING OR ADEQUACY FOR A PARTICULAR USE; AND ALL THESE
GUARANTEES ARE EXPRESSLY EXCLUDED AND CANCELLED.
WARNING
The information contained in this booklet can be changed without notice.
The manufacturer makes no warranty whatsoever with respect to the warranties of
commercial quality of this product or its suitability to a particular use.

Version 1.0
The manufacturer is not responsible for mistakes that could be found in this handbook
and also for direct or indirect damage resulting from the equipment, its performances
and the use of this product.
CLEANING
Use a soft cotton cloth slightly soaked with an ethyl alcohol based product.
DO NOT USE the following products: acetone, benzene, toluene and halogens
hydrocarbons.
TECHNICAL SERVICE. No element of the product can be replaced by the user. If the
product is defective, please send it back to Metro or to one of its distributor. The list is
available from the Metro website.

3. INTRODUCTION
3.1. PRODUCT PRESENTATION
The MB-RS module allows to connect the entire range of M-Bus modules (except the
MB-BT – Bluetooth) on a PC or a PLC with USB or RS232 through and ASCII
protocol or with MODBUS-RTU.
Up to 254 inputs can be connected.
A footswitch ref 18020 can be also connected on the MB-RS.
The power supply is done through an external power transformer
3.2. CARACTERISTICS
3.2.1. Main technical characteristics
 Up to 254 inputs
 RS232 com port for computer or PLC
 M-Bus port for connecting the M-Bus multiplexers (except the MB-BT – Bluetooth
module)
 USB full speed port with ASCII protocol
 Reset button
 Data transfert trhough footswitch pulse or through a command on the RS232 or
USB port
 Operating Temperature : +15°C à +30°C
 Relative humidity : maximum 80%
 Dimensions : width 83 mm, height 39 mm, depth 74 mm
 Weight : 165 grammes
 Standard 7.5*35 DIN Rail mounting

Version 1.0
3.2.2. Dimensions and installation
The M-Bus modules are made on a robust aluminium profile.
All the M-Bus modules are designed and must be installed on a standard DIN rail
(7.5*35) in order to ensure a correct fixation.

3.2.1. Contains of the packaging
The MB-RS package contains :
- 1 MB-RS module
- 1 RS232 cable RJ45SUB-D9
- 1 USB cable
- 1 transformer + 1 power supply cable
- 1 Mini-CD including USB driver and this user manual

Version 1.0
4. CONNECTORS
4.1.1. THE RS232 COMMUNICATION PORT
The MB-RS module is fitted with a RS232 port to be connected to a PLC or a
computer.
The RS232 COM port configuration is the following
115200 bauds, 8 bits, 1 stop bit, no parity
RJ45 CONNECTOR PINOUT
Pin Signal
Direction Description
1 N.C.
2 N.C.
3 Gnd - Ground
4 TX Output Transfer of data
5 RX Input Reception of data
6 N.C.
7 N.C.
8 N.C.
USB Full-Speed with
ASCII protocol
(Creates a virtual
COM PORT)
RS232 with ASCII or
modbus RTU.
RJ45 connector.
Footswitch input
Power supply
connector
12-30 VDC
Reset button

4.1.2. THE USB FULL-Speed CONNECTOR
Connecting the MB-RS on the computer with USB will create a virtual COM Port.
Follow the following instructions before using the MB-RS :
1- Launch the file « driver USB.exe » located in the directory « Driver USB » on the mini-
cd.
2- Connect the MB-RS to your computer through the USB cable, a with the power
supply. The following message appears few seconds after:
3- A COM PORT (USB SERIAL PORT) appears in the device manager menu.
(Configuration panel  Device manager  Ports (COM & LPT)
You can then note the COM port number. It can be usefull later for the configuration of
your acquisition software.

Version 1.0
5. COMMUNICATION - ASCII PROTOCOL
The ASCII protocol allows to identify the modules on the bus, to read individually the
probes, to read the inputs status of an I/O module, to write on a output of an I/O
module etc…
All the commands ends by <CR> (Ascii $0D)
5.1.1. Identification of the MBus modules
Before reading the probes, it is necessary to identify the connected modules on the
MB-RS. This has to be done only the first time.
Up to 254 input can be connected. The adress of the input will thus be from 00 to FE.
 Identify a module:
o Command : @NY=XX<$0D> with XX = adress of the first channel in
hexadecimal
o Move the first probe of the module or press the ID button depending on
the module you use.
o Answer : XXXXXXXXXX<$0D> when the module has been correctly
identied (example : 9#I816102422<CR>). The value corresponds to
the unique identification number of the module.
Example : identify a MB-8I (8 inductive probes), a MB-4C module (4 Sylvac capacitive
probes), and a MB-IO module (8 inputs/outputs) :
00 to 07 08 to 0B 0C
STEP 1 – Identify the MB-8I module
Command : @NY=00<$0D>
Move the first probe of the module or press the ID button depending on the module
you use.
Answer (example) : 9#I816102422<$0D>
 The channels from 00 to 07 will be attributed to the MB-8I
STEP 2 – Identify the MB-4C module
Command : @NY=08<$0D>
Answer (example) : 9#C416102465<$0D>
 The channels from 08 to 0B will be attributed to the MB-4C

STEP 3 – Identify the MB-IO module
Command : @NY=0C<$0D>
Answer (example) : 9#E816133461<$0D>
 The MB-IO is now identifed at the address 0C
 Note : the MB-IO takes only 1 adress in the BUS.
 List of identified modules :
o Command : @ID? <$0D>
o Answer : @NN=XXXXXXXXXX<$0D>
@NN=XXXXXXXXXX<$0D>
@NN=XXXXXXXXXX<$0D><$0A>
Where NN=adress of the first channel of the module
Where XXXXXXXXXX = ID number of the module
If no module is identifed, the answer will be : <$0D><$0A>
Example : make the list of the modules identified on the last example :
00 to 07 08 to 0B 0C
o Command : @ID? <$0D>
o Answer : @00=9#I816102422<$0D>
@08=9#C416102465<$0D>
@0C=9#E816133461<$0D><$0A>

Version 1.0
 Erase 1 module :
o Command : @CL=XX<$D>
Where XX = adress of the first channel of the module to be removed.
Example : erase the MB-4C module identified on the last example :
00 to 07 08 to 0B 0C
o Command : @CL=08<$D>
 Erase all the modules :
o Command : @RAZ<$0D>
o Answer :
RAZ IDs… DONE <$0D>
RAZ Config… DONE<$0D>

5.1.2. Commands for reading the probes
For asking the value of a probe, the computer or PLC must send a 3 characters
string : o Command : NN<$0D> with NN = adress of the probe
o Answer : +/-000.0000 <$0D> (position in mm)
 The first character is the ASCII code of the Hexadecimal value for the bits 4 to 7
(Example : 0  30h ; F  46h)
 The 2nd character is the ASCII code of the Hexadecimal value for the bits 0 to
3
 The 3rd character is the « carriage return » (ASCII 0Dh)
 0000 0000 = probe 1
 1111 1110 = probe 255
Example : read the probes n°3 connected on the MB-8I (8 inductive probes)
and the probe n°1 on the module MB-4C (4 Sylvac capacitive probes),
previously identified on the last example :
The probe°3 of the first module is at the adress 02
Command : 02<$0D>
Answer (example) : 001.4554<$0D >
 The probe n°3 of the first module (adress 02) indicates 1.4554mm
The probe°1 of the second module is at the adress 08
Command : 08<$0D>
Answer (example) : 023.9874<$0D >
 The probe n°1 of the second module (adress 08) indicates 23.9874mm
If no probe is connected, the value –999.9999<$0D> is sent.
7 6 5 4 3 2 1 0
1st character
2
nd
character

Version 1.0
5.1.3. MB-RS version
It could be asked by the technical support.
It could be useful to send this command first to see if the communication works
correctly.
o Command : @SN?<$0D>
o Answer : XXX<$0D>
5.1.4. Inputs/ Outputs (MB-IO modules)
It is possible to connect MB-IO modules on the MB-RS.
MB-IO modules are fitted with 8 optocoupled inputs/outputs.
The 8 outputs are similar to the « open collector PNP » type. They can be used with
an external power supply 12 to 30 VDC maximum. The maximal output current
drained by each output is 50mA
The 8 inputs represent a 2.2kOhms load connected to the 0 volt.
The inputs and outputs are isolated by optocoupler.

Examples of connection between a PLC and a MB-RS
Output to PLC
0V of the PLC
I1
0 V
MB-IO module PLC
+ 24V
Output
+ 24 V from the PLC
0 V
MB-IO module PLC
0 V 0 V
0V of the PLC
PLC output
+ 24V
E1
Input
+ 24 V from the PLC
+ 24V
+ 24V

Version 1.0
Outputs
Activate 1 or several outputs :
o Command : OXX=YY<$0D>
Where XX = adress of the MB-IO module and YY the status of the
outputs in Hexadecimal
Example : Activate the output 8, 7 and 2 of the MB-IO module, previsouly
identified at the adress 0C
Pin
number
8 7 6 5 4 3 2 1
BIN 1 1 0 0 0 0 1 0
HEX C 2
Command : O0C=C2<$0D>
Inputs
Read the inputs status of a MB-IO module :
o Command : IXX<$0D>
Where XX = adress of the MB-IO module
o Answer : YY<$0D>
Where YY = status of the inputs in Hexadecimal
Example : Read the input of the MB-IO module, previsouly identified at the
adress 0C. (For the example we define that the inputs 4 and 2 have been
activated by the external system).
HEX 0 A
BIN 0 0 0 0 1 0 1 0
Pin
number
8 7 6 5 4 3 2 1
Command : I0C<$0D>
Answer : 0A<$0D>

5.1.5. Resolution of a module for TTL probes
If you use the MB-2T module for TTL probes, you will need to send a command for
setting the resolution of each input of the module, depending on the probe you have
connected.
o Command @RESxx=YY<$OD>
Where xx = adress of the channel to configure
Where YY = resolution in 0.1µm  05 for 0.5µm or 10 for 1µm
5.1.6. Reset the counter of the modules for TTL, 1Vpp or 11µA probes
o Command Cxx<$0D>
Where xx = adress of the channel to configure
5.1.7. Step and Interpolation of an incremental probes 11µA or 1Vss
o Command @STPxx=II,PP<$0D>
Where xx = adress of the channel to configure
Where II = interpolation from 20 to 200 with II=real step/10
example 02 for 20 and 20 for 200
Where PP = STEP en µm (example 0.2 for the Heidenhain MT12XX,
MT25XX, 10 for Heidenhain MT101, 20 for Heidenhain ST12xx or ST30XX)

Version 1.0
6. MODBUS RTU COMMUNICATION PROTOCOL
This protocol allows to connect the MB-RS on a PLC compatible with the MODBUS
RTU.
This protocol allows to control all the functionalities of the MB-RS through several
registers.
Up to 256 registers can be read by data frame.
Adress : always = 1
Code : The MB-RS supports the code « 3 » in reading
Data : 1 to 256 registers
CRC16 : verification code on 2 bytes
It is possible to read the probes by 2 ways :
 With a real 32 bits
 With a signed integer 16bits (value in µm)
For getting the real values, you must read the registers 7000 to 7506
Probe 1 : register 7000
Probe 2 : register 7002
Probe 3 : register 7004
...
Probe 254 : register 7506
For getting the 16 bits integer value, you must read the registers 8000 to 8253
Probe 1 : register 8000
Probe 2 : register 8001
Probe 3 : register 8002
...
Probe 254 : register 8253