Orbit Merret OMD 202RS User manual

OMD 202RS - MB
/ DIGIT PROGRAMMABLE
LARGE DISPLAY
DATA DISPLAY
RS /
MODBUS
USER MANUAL
WARRANTY
YEARS

2| INSTRUCTIONS FOR USE OMD 202RS
TECHNICAL DATA
Measuring instruments of the OMD  series conform to the European regulation //EU and //EU
The instruments are up to the following European standards:
EN - Electrical safety
EN - Electronic measuring, control and laboratory devices – Requirements for EMC “Industrial use”
The recorders are applicable for unlimited use in agricultural and industrial areas.
ORBIT MERRET, spol. sr.o.
Vodnanska /
 Prague 
Czech Republic
Tel: + -   
Fax: + -   
e-mail: [email protected]
www.orbit.merret.eu
SAFETY INSTRUCTIONS
Please read carefully the enclosed safety instructions and observe them!
Installation,alloperationalinterventions,maintenanceandservicemustbeperformedbyaqualifiedpersonnel
and in accordance with the attached information and safety regulations. The manufacturer is not liable for
damage caused by improper installation, configuration, maintenance, and service.
The recorder must be installed according to the respective application. Incorrect installation can cause a
malfunction, which can result in damage or accident.
The recorder uses dangerous voltages that can cause a fatal accident. Before you start solving problems
(e.g. in case of failure or disassembly), the device must be disconnected from the power supply. For safety
information the EN - + A standard must be observed.
When removing or inserting a card, observe the safety instructions and follow the recommended procedure.
During any intervention the recorder must be disconnected from the power supply.
Do not attempt to repair or modify the device. A defective recorder must be sent for repair to the manufacturer.
These devices should be safeguarded by isolated or common fuses (breakers)!
The recorder is not designed for installation in potentially explosive surroundings (Ex). Use it only outside
potentially explosive surroundings

INSTRUCTIONS FOR USE OMD 202RS | 3
.CONTENTS
. CONTENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
. INSTRUMENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 
. INSTRUMENT CONNECTION . . . . . . . . . . . . . . . . . . . . . 
Instrument connection. . . . . . . . . . . . . . . . . . . . . . . . . . 
. INSTRUMENT SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . 
User data format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Symbols used in the instructions . . . . . . . . . . . . . . . . 
Setting the DP and the (-) sign . . . . . . . . . . . . . . . . . . 
Control keys function .. . . . . . . . . . . . . . . . . . . . . . . . . 
Setting/permitting items into “USER” menu. . . . . . . 
. SETTING “LIGHT” MENU . . . . . . . . . . . . . . . . . . . . . . . . 
. Description “LIGHT” menu . . . . . . . . . . . . . . . . . . . . 
Entering the menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Setting data output. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Setting analog output . . . . . . . . . . . . . . . . . . . . . . . . . 
Setting display colors. . . . . . . . . . . . . . . . . . . . . . . . . . 
Setting the address of IR remote control . . . . . . . . . 
Selection of programming menu „LIGHT“/„PROFI“ 
Restoration of manufacture setting . . . . . . . . . . . . . . 
Selection of instrument menu language version. . . 
Setting new access password . . . . . . . . . . . . . . . . . .
Instrument identification . . . . . . . . . . . . . . . . . . . . . . . 
. SETTING “PROFI” MENU . . . . . . . . . . . . . . . . . . . . . . . . 
. Description of “PROFI” menu. . . . . . . . . . . . . . . . . . 
. “PROFI” menu - INPUT
.. Resetting internal values . . . . . . . . . . . . . . . . 
.. Configuring the instrument.. . . . . . . . . . . . . . . 
.. External input function selection . . . . . . . . . . 
.. Optional accessory functions of the keys. . . 
. “PROFI” menu - CHANNEL
.. Setting measuring parameters . . . . . . . . . . . . 
.. Setting mathematic functions . . . . . . . . . . . . . 
.. Selection of evaluation of min/max. value . . 
. “PROFI” menu - OUTPUT
.. Selection of excitation . . . . . . . . . . . . . . . . . . . 
.. Setting Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . 
.. Setting analog output. . . . . . . . . . . . . . . . . . . . 
.. Selection of display projection . . . . . . . . . . . . 
. “PROFI” menu - SERVICE
.. Setting the address of IR remote control . . . 
.. Selection of programming menu
„LIGHT“/„PROFI“ . . . . . . . . . . . . . . . . . . . . . . . 
.. Restoration manufacture setting . . . . . . . . . . 
.. Selection of instrument menu
language version . . . . . . . . . . . . . . . . . . . . . . . 
.. Setting new access password . . . . . . . . . . . . 
.. Instrument identification . . . . . . . . . . . . . . . . . 
. SETTING ITEMS INTO “USER” MENU . . . . . . . . . . . . . 
. DATA PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
. ERROR STATEMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . 
. TABLE OF SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . 
. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
. INSTRUMENT DIMENSIONS AND INSTALATION . . . 
. CERTIFICATE OF GUARANTEE . . . . . . . . . . . . . . . . . . 

4| INSTRUCTIONS FOR USE OMD 202RS
. INSTRUMENT DESCRIPTION
2.1 DESCRIPTION
The OMD RS model series are / digit large panel programmable displays for the projection of data from data lines RS ,
RS  in protocoles ASCII/MESSBUS/MODBUS/PROFIBUS. The instrument can be supplied with either a -colour LED display
(red/green/orange) or with hight intensity SMD LEDs (red or green with brightness of   mcd).
The instrument is based on an -bit microcontroller, which secures high accuracy, stability and easy operation of the
instrument.
PROGRAMMABLE PROJECTION
Setting: Selection of integer/float input range
Protocol: ASCII/MESSBUS*
MODBUS - RTU
PROFIBUS DP*
Projection: -… (-…)
DIGITAL FILTERS
Floating average: from… measurements
Exponential average: from… measurements
Arithmetic average: from… measurements
Rounding: setting the projection step for display
MATHEMATIC FUCTIONS
Min/max. value: registration of min./max. value reached during measurement
Tare: designed to reset display upon non-zero input signal
Peak value: the display shows only max. or min. value
Mat. operations: polynome, /x, logarithm, exponential, power, root, sin x
EXTERNAL CONTROL
Lock: control keys blocking
Hold: display/instrument blocking
Tare: tare activation/resetting tare to zero
Resetting MM: resetting min/max value
* description is presented in a separate manual

INSTRUCTIONS FOR USE OMD 202RS | 5
.INSTRUMENT DESCRIPTION
2.2 OPERATION
The instrument is set and controlled by IR Remote control. All programmable settings of the instrument are performed in three
adjusting modes::
LIGHT Simple programming menu
- contains solely items necessary for instrument setting and is protected by optional number code
PROFI Complete programming menu
- contains complete instrument menu and is protected by optional number code
USER User programming menu
- may contain arbitrary items selected from the programming menu (LIGHT/PROFI), which determine the right
(see or change)
- acces without password
All programmable parameters are stored in the EEPROM memory (they hold even after the instrument is switched off).
Complete instrument operation and setting may be performed via OM Link communication interface, which is a standard equip-
ment of all instruments.
The operation program is freely accessible (www.orbit.merret.eu) and the only requirement is the purchase of OML
cable to connect the instrument to PC. It is manufactured in version RS 232 andUSB and is compatible with all
ORBIT MERRET instruments. Another option for connection is with the aid of data output RS 232 or RS 485 (without the need
of the OML cable).
The program OM LINK in „Basic“ version will enable you to connect one instrument with the option of visualization and archiving
in PC. The OM Link „Standard“ version has no limitation of the number of instruments connected.
2.3 OPTIONS
Excitation is suitable for supplying power to sensors and transmitters.
Comparators are assigned to monitor one, two, three or four limit values with relay output. The user may select limits regime:
LIMIT/DOSING/FROM-TO. The limits have adjustable hysteresis within the full range of the display as well as selectable delay
of the switch-on in the range of ..., s. Reaching the preset limits is signalled by LED and simultaneously by the switch-on
of the relevant relay.
Analog outputs will find their place in applications where further evaluating or processing of measured data is required in external
devices. We offer universal analog output with the option of selection of the type of output - voltage/current. The value of analog
output corresponds with the displayed data and its type and range are selectable in Menu.

6| INSTRUCTIONS FOR USE OMD 202RS
. INSTRUMENT CONNECTION
The instrument supply leads should not be in proximity of the incoming low-potential signals.
Contactors, motors with larger input power should not be in proximity of the instrument.
The leads into the instrument input (measured quantity) should be in sufficient distance from all power leads andappliances.
Provided this cannot be secured it is necessary to use shielded leads with connection to ground (bracket E).
The instruments are tested in compliance with standards for use in industrial area, yet we recommend to abide by the above
mentioned principles.

INSTRUCTIONS FOR USE OMD 202RS | 7
.INSTRUMENT CONNECTION
YExternal inputs
EXT. 1 EXT. 3 EXT. 2
4
1
*Option
]Input
12
8
]Relays*
[Analogue output*
AO - U GND AO - I
3
1
++
-
\Input - PROFIBUS*
B - Positive GND A - Negatice
3
1
XPower supply
N
E
L
+
-
L+ L- GND
TxD RxD
RS 485
RS 232
L1 L4 L3 L2
FUSE
L N E
X]
[ \
1
3 1 3
–
+
ZExcitation*
7
5
L+ L- NC
Y Z
1
4
5
8
12
7
]
-
+

8| INSTRUCTIONS FOR USE OMD 202RS
. INSTRUMENT SETTING
SETTING
PROFI
For expert users
Complete instrument menu
Access is password protected
Possibility to arrange items of the USER MENU
Tree menu structure
SETTING
LIGHT
For trained users
Only items necessary for instrument setting
Access is password protected
Possibility to arrange items of the USER MENU
Linear menu structure
SETTING
USER
For user operation
Menu items are set by the user (Profi/Light) as per request
Access is not password protected
Optional menu structure either tree (PROFI) or linear (LIGHT)

INSTRUCTIONS FOR USE OMD 202RS | 9
INSTRUMENT SETTING .
4.1 SETTING
The instrument is set and controlled by IR Remote control. All programmable settings of the instrument are performed in three
adjusting modes::
LIGHT Simple programming menu
- contains solely items necessary for instrument setting and is protected by optional number code
PROFI Complete programming menu
- contains complete instrument menu and is protected by optional number code
USER User programming menu
- may contain arbitrary items selected from the programming menu (LIGHT/PROFI), which determine the right
(see or change)
- acces without password
Complete instrument operation and setting may be performed via OM Link communication interface, which is a standard
equipment of all instruments.
The operation program is freely accessible (www.orbit.merret.cz) and the only requirement is the purchase of OML cable to
connect the instrument to PC. It is manufactured in version RS  and USB and is compatible with all ORBIT MERRET instruments.
Another option for connection is with the aid of data output RS  or RS  (without the need of the OML cable).

10 | INSTRUCTIONS FOR USE OMD 202RS
INSTRUMENT SETTING
Setting and controlling the instrument is performed by means of the Remote control. With the aid of the Remote control it is
possible to browse through the operation menu and to select and set the required values.
Symbols used in the instructions
DEF values preset from manufacture
42symbol indicates a flashing light (symbol)
MIN inverted triangle indicates the item that can be placed in USER menu
LI M . L.1 broken line indicates a dynamic item, i.e. it is displayed only in particular selection/version
after pressing the key the set value will not be stored
after pressing the key the set value will be stored

continues on page 
Setting the decimal point and the minus sign
DECIMAL POINT
Its selection in the menu, upon modification of the number to be adjusted it is performed by the control key with transition
beyond the highest decade, when the decimal point starts flashing. Positioning is performed by / .
THE MINUS SIGN
Setting the minus sign is performed by the key on higher decade. When editing the item substraction must be made from the
current number (e.g..: 013 > , on class 100 > -87)
the last two places may display
measuring units
A 1
4
3
2
Data communications (orange LED)
Measured value (red/green/orange LED)
Ralay status (red LED)
ON the digit is lit
OFF the digit is not lit
OFF the digit is flashing
limits withrestriction
(hysteresis, delay)
M Min/max. value
- upper LED
T Tare
- bottom LED
Function (green LED)
IR remote control
.