Orbit Merret OM PROFI User manual

OM PROFI
PROTOCOL
DESCRIPTION/COMMUNICATIONS
PROFIBUS
PROFINET
USER MANUAL
Outstanding Measurement Value

2| USER MANUAL OM PROFI
SAFETY INSTRUCTIONS
Please read and observe the enclosed safety instructions carefully!
Installation, all operations, maintenance and service must be carried out by qualified personnel only
and in accordance with the enclosed information and safety regulations.
The manufacturer is not responsible for any damage caused by improper installation, configuration,
maintenance and service of the device.
The device must be installed correctly according to the actual application. Improper installation maycause
malfunction, which may result in damage to the unit or an accident.
The device uses dangerous voltage that can cause a fatal accident. The unit must be disconnected from
the power supply before starting troubleshooting (in case of malfunction) or before dismantling the unit.
For safety information, EN  - + A must be observed.
Whenremovingorinserting anelectronicscard,observethesafetyinstructionsand followtherecommended
procedures. Disconnect the unit from power supply before inserting / extracting any electronics cards.
Do not attempt to repair or modify the device yourself. In case of malfunction the device must be dis-
mounted and submitted to the manufacturer for repair.
These devices should be protected by either individual or shared fuses (circuit breakers)!
Thedevice isnotintendedforinstallationin explosiveareas.Use the device onlyoutside the explosive areas.
DANGER WARNING ATTENTION
RISK OF ELECTRIC SHOCK
- Disconnect all power supply and live
wires before servicing.
RISKS ASSOCIATED WITH USE
- Do not use this product in a safety
critical system.
- Do not disassemble, repair or modify
the product.
- Do not use the product outside the
recommended operating conditions.
RISKS ASSOCIATED WITH USE
- Install a 100 mA fuse
Failure to follow this instruction will
result in death or serious injury.
Failure to follow these instructions
may result in death, serious injury, or
damage to the equipment
Failure to observe this precaution
could result in personal injury or
equipment damage.
This electrical equipment may be installed, operated and maintained only by qualified personnel.
ORBIT MERRET assumes no responsibility for any consequences arising from the use of this equipment.

USER MANUAL OM PROFI | 3
INSTRUMENT
CONNECTION .
1.1 CONNECTION OF THE INSTRUMENT
The connection of ORBIT MERRET devices to the Profibus data link is implemented by an internal card with
the SPC 3 control circuit.
Connector arrangement
B - Positive (original Cannon - pin 3)
A - Negative (original Cannon - pin 8)
GND (original Cannon - pin 5)
Connector arrangement
GND (original Cannon - pin 5)
A - Negative (original Cannon - pin 8)
B - Positive (original Cannon - pin 3)
Line termination
Signalling LEDs
Profibus card in instruments of these models: OM 402, 502 and 602
Data card in OMU 408
Ends of the Profibus line (bus segment) need to be equipped with terminal
resistors, please see the diagram. Terminal resistors may either be part of
the connectors or wired to the data card. Termination in the Profibus card
is performed by plugging in all three jumpers next to the connector X3

4| USER MANUAL OM PROFI
.
DESCRIPTION
OF COMMUNICATION
The connection of ORBIT MERRET devices to the ProfiNet data line is implemented by an internal card with
the TPS-1 control circuit.
The order of connected lines does not matter
2.1 LED SIGNALISATION
STATUS - Profibus
„D 1“
LED green
OM communicat.
„D 2“
LED gelb
ProfiBus line
„D 3“
LED red
Error
Start – initial delay and initialisation flashing flashing flashing
Start – identification of OM instruments light on light on light on
Communication with OM instruments light on (flashing) light off light off
Communication via Profibus line light off light on (flashing) light off
The set function is unknown light off light on light off
Error in communication with OM instruments light on light off light on
Error in communication via Profibus line light off light on light on
Error of OM instrument
(communication speed is out of range) light off light off light on
STATUS - Profinet „D 1“
LED gelb
„D 2“
LED green
„D 3“
LED red
„D 4“
LED red
„D 5“
LED green
Setup Requirement flashing
Profinet driver error light off
No communication with the processor flashing
Everything is ok light on
System error light on
OM device is not on line light on
OM on the line but the controlleris not activated flashing
OM device connected and communicating light off
Error light on
Bootloader flashing - fast
Everything is ok flashing - slow
Port 1
Port 2
D1
Signalling LEDs
D1 D2 D3 D4 D5

USER MANUAL OM PROFI | 5
DESCRIPTION
OF COMMUNICATION .
2.1.1 PROFIBUS ANDOM LINE INTERFACE STATUS
After a switch-on the Profibus card initialises, tests itself and then connects to the ProfiBus interface.
Initially during the testing and connection all LEDs are on. Red LEDs flash. The display reads: „PB“. In instru-
ments with 6 digit display it reads
„99“ (instrument with internal ProfiBus card) and the address of OM instrument divided by space. In instruments
with 4 or 3 digit displays only the ProfiBus address is shown. Profibuss address is entered directly into the
instrument’s menu. If the instrument is set for a mode, which cyclically reads or sets an OM xxx device, LEDs
„D1“ a „D2“ start flashing alternatively.
In a mode in which the OM xxx is set in a single step, or when information is read out from the OM ProfiBus
card only LED „D2“ flashes, signalling that the ProfiBus communication line is on.
In the event of an error LED „D3“ lights up, indicating an error as per table.

6| USER MANUAL OM PROFI
2.2 DESCRIPTION OF COMMUNICATION ON THE LINE
2.2.1 CONNECTION OF OM XXX INSTRUMENTS TO OM PROFIBUS CARD
OM ProfiBus card supports the following interprocessor communication speeds: 600, 1 200, 2 400, 4 800, 9
600, 19 200, 38 400, 57 600, 115 200 Baud.
When initialised, the card reads out identification of the device (i.e. “OM 402UNI”), also the information about
the number of measuring channels, mathematical channel and integral and the number of relay outputs.
2.2.2 OM PROFIBUS CARD MODES ANDDATA STRUCTURE OF RECEIVED AND TRANSMITTED TELEGRAM  IN
Telegram transmitted into OM instrument
Addr. Data type Function Note
0 Byte „Function“ Defines „Function“ (the Profibus card‘s behaviour mode)
- downloading values + setting limits
- displaying values Float (Real)/Signed Long
- displaying texts
- sending OM ASCII commands
1 Byte Adress = 00 00 (used only with OMX Profibus)
2 Byte Function + Address
EEPROM
Downloading /recoding Profibus card paramters stored in its
EEPROM
(< 128 = downloading, >127 = recording + downloading)
3 Byte Value to EEPROM Value to which Profibus card parameter is to be set in EEPROM
4…7 Float Display value Decimal number, which is displayed through functions 10 to 15, 20
4…7 signed long Display value Integer number with 4 byte sign, which is displayed through function
30
8…15 8x Char Display text Text displayed on OM instrument through function 100
The following values are valid only when selecting GSD file types in the instrument (MENU/OUTPUT/DATA/GSD) - „Channel + limits“
16…47 8x Float Value of limits 1…8 Values to which limits are set in current instrument by means of confi-
guration byte „Relay Mask“
16…47 32x Char OM Command Text of command for OM instruments sent by functions 129, 130, 229
and230
48 Byte Relay mask Permission to change limit values 1 to 8 as per significance of bits 0 to 7
.
DESCRIPTION
OF COMMUNICATION

USER MANUAL OM PROFI | 7
DESCRIPTION
OF COMMUNICATION .
Telegram transmitted into OM instrument (older version or selection of GSD file in menu - OLD)
Addr. Data type Function Note
0 Byte „Function“ Defines „Function“ (the Profibus card‘s behaviour mode)
- downloading values + setting limits
- displaying values Float (Real)/Signed Long
- displaying texts
- sending OM ASCII commands
1 Byte Adress = 00 00 (used only with OMX Profibus)
2…5 Float Display value Decimal number, which is displayed through functions 10 to 15, 20
2…5 signed long Display value Integer number with 4 byte sign, which is displayed through function 30
6…37 8x Float Value of limits 1…8 Values to which limits are set in current instrument by means of confi-
guration byte „Relay Mask“
6…37 32x Char OM Command Text of command for OM instruments sent by functions 129, 130, 229
and230
38…45 8x Char Display text Text displayed on OM instrument through function 100
46…49 Float Rezerva
50 Byte Function + Address
EEPROM
Downloading / recoding Profibus card paramters stored in its EEPROM
(< 128 = downloading, >127 = recording + downloading)
51 Byte Value to EEPROM Value to which Profibus card parameter is to be set in EEPROM
52 Byte Relay mask Permission to change limit values 1 to 8 as per significance of bits 0 to 7
53 Byte Reserve
2.2.3 OM PROFIBUS MODES AND DATA STRUCTURE OF RECEIVED AND TRANSMITTED TELEGRAM  OUT
Telegram transmitted from OM apparatus
Addr. Data type Function Note
0 Byte „Function“ Mirrorred value of set “Function”
1 Byte „Adress“ Mirrorred value of set Address
2Byte 1 Identified number of connected OM xxx instruments (used only with
OMX Profibus)
3 Byte Flag Valid data market
4 Byte Number of channels Number of measuring channels of current instrument
5 Byte Number of relays Number of relays of current instrument
6 Byte Value fromEEPROM Value of Profibus card parameters stored in its EEPROM
7 Byte Index Value increasing upon every data transmission
The following values are valid only when selecting GSD file types in the instrument (MENU/OUTPUT/DATA/GSD) )
8…11*
8…27**
8…43***
1x Float*
5x Float**
9x Float***
Value of channels 1…9 Value of measuring channels of OM xxx instrument in 0 mode
8…11*
8…27**
8…43***
4x Char*
5x Char**
9x Char***
Response OM xxx
Data
Response to command sent to OM xxx instrument through functions
129, 130 returned data through functions 128, 131 až 134
* when selecting the GSD file setting in the instrument menu to “1 Channel” or “1 Channel + Limit”
** when selecting the GSD file setting in the instrument menu to “5 Channels” or “5 Channels + Limit”
*** when selecting the GSD file setting in the instrument menu to “9 Channels” or “9 Channels + Limit”

8| USER MANUAL OM PROFI
DESCRIPTION
OF COMMUNICATION.
Telegram transmitted from OM apparatus (older version or selection of GSD file in menu - OLD)
Addr. Data type Function Note
0 Byte „Function“ Mirrorred value of set “Function”
1 Byte „Adress“ Mirrorred value of set Address
2…37 9x Float Value of channels 1…9 Value of measuring channels of OM xxx instrument in 0 mode
2…37 36x Char Response OM xxx
Data
Response to command sent to OM xxx instrument through functions
129, 130 returned data through functions 128, 131 až 134
38 Byte 1 Identified number of connected OM xxx instruments (used only with
OMX Profibus)
39 Byte Flag Valid data market
40 Byte Number of channels Number of measuring channels of current instrument
41 Byte Number of relays Number of relays of current instrument
42 Byte Value fromEEPROM Value of Profibus card parameters stored in its EEPROM
43 Byte Index Value increasing upon every data transmission
OM Profibus card parameters stored inEEPROM
Addr. Record
value
Function Manufact.
value
Note
3 131 TimeOut -
OM xxx
4
197…260 ms
Delay for reporting errors in communication with OM xxx instruments
X * 66 ms (inaccuracy from X – 1 to X)
4132 TimeOut -
Profibus
76
aprox. 5 s
Delay for reporting errors in communication to ProfiBus
X * 66 ms (inaccuracy from X – 1 to X)
5133 Transmiss.
delay
8
aprox. 0,6 s
Delay used for downloading in cycles or display projection
(66…131 ms) + X * 66 ms
6 134 Unused (Only for OMX ProfiBus)
7 135 Unused (Only for OMX ProfiBus)
8 136 Error display
“PB OFF” 0
0 - in the event of an error on the PROFIBUS line, the „PB OFF“ message
is permanently displayed on the instrument display
1 - If an error occurs on the PROFIBUS line, the „PB OFF“ message
appears once on the instrument display
2 - the error on the PROFIBUS line is indicated only by the LED
9 139
Setting the
length of the
receivedand
transmitted
telegram
1
0 - NoLim_1xvalue input 16B output 12B
1 - NoLim_5xvalue input 16B output 28B
2 - NoLim_9xvalue input 16B output 44B
3 - Limits_1xvalue input 16B output 12B
4 - Limits_5xvalue input 16B output 12B
5 - Limits_9xvalue input 16B output 12B
10…29 138…147 Reserve May be used to record values
(Max. 100 000 records (100k Write Cycles))

USER MANUAL OM PROFI | 9
.
DESCRIPTION
OF COMMUNICATION
OM Profibus card parameters stored inEEPROM (older version or selection of GSD file in menu - OLD)
Addr. Record
value
Function Manufact.
value
Note
3 131 TimeOut -
OM xxx
4
197…260 ms
Delay for reporting errors in communication with OM xxx instruments
X * 66 ms (inaccuracy from X – 1 to X)
4132 TimeOut -
Profibus
76
aprox. 5 s
Delay for reporting errors in communication to ProfiBus
X * 66 ms (inaccuracy from X – 1 to X)
5133 Transmiss.
delay
8
aprox. 0,6 s
Delay used for downloading in cycles or display projection
(66…131 ms) + X * 66 ms
6 134 Unused (Only for OMX ProfiBus)
7 135 Unused (Only for OMX ProfiBus)
10…29 138…147 Reserve May be used to record values
(Max. 100 000 records (100k Write Cycles))
List of modes („Functions“)
„Function“ Function Note
0 Downloading
values fromOM
xxx instruments
Channel values are downloaded in cycles from theOM xxx instrument with set Address.
Betweendownloadingsthereis a delayinserted,which is setin„Transmission delay“inEEPROM
of the OM Profibus card.
10…15 Displaying
numbersonOM
xxx instrument
Setting display onto decimal number value is repeated in cycles
(function 10 = w/o d.p., 5 = 5 decimal places)
Afterfunction termination (interrupted communication, change of address) the numberstops
displaying itself after approx. 2,5 s
20 Inserting and
projectingdeci-
mal number in
OM xxx instru-
ment
Functions are designed for OM xxxRS instruments, which are able to receive and
process the value (re-calculate, evaluate limit statuses, set the analog output, dis-
play the value in relevant format, change the display colour as per value size).
The value stays projected in the instrument until another value is recorded or the instrument
switches off.
30 Inserting and
projecting inte-
ger number in
OM xxx instru-
ment
Functions are designed for OM xxxRS instruments, which are able to receive and
process the value (re-calculate, evaluate limit statuses, set the analog output, dis-
play the value in relevant format, change the display colour as per value size).
The value stays projected in the instrument until another value is recorded or the instrument
switches off.
100 Projection of
text on display Projection of text on OM xxx instrument display is repeated in cycles.
128 Projection of
OMxxx instrum.
identification
Projection of current OM xxx instrument identification ascertained after the Profibus card
is switched on.
129…130
229…230 Sending
OM command
Upon the change of function OM command is sent to RS 485 line. Functions 129 and130
are waiting for response from OM xxx instrument. Received answer is stored in transmitted
telegramu.
131 Bulk parameter
downloading
The telegram area designed for data is completed with the EEPROM content of OM Profibus
card, in which the card‘s parameters are stored
132 Downloading
SW version
Thetelegramareadesigned fordatais completedwithSWidentificationof the OM Profibuscard
e.g.: „V.1.1.2 - 11/16/07 16:47:20(B737)“, the brackets give a check sum of the card‘s program
memory
133 EEPROM
check sum
The telegram area designed for data is completedwith a check sum of the EEPROM memory
in which the OM Profibus card parameters are stored. E.g..: „1327“
134 Downloading
counters
The telegram area designed for data is completed with service counters readings
(card‘s number of switch-on cycles and total running time) E.g.: „000012;000006“
No data is downloaded unless the „Flag“ value is set to  and the „Function“ and„Address“ values are not identical in both telegrams (the received and
the transmitted).
Similar rule applies to an executed command: unless the „Function“ and „Address“ values are not identical in both telegrams (the received and the
transmitted), the function is not performed

10 | USER MANUAL OM PROFI
DESCRIPTION
OF COMMUNICATION.
2.2.4 CONNECTION OF OM XXX DEVICES TO THE INTERNAL OM PROFIBUS DATA CARD
Downloading fromOM instruments is performed through the „0“ function. If the function is active, downloading
channel values from OM xxx instrument with set address is performed in cycles. Between downloadings there
is a delay inserted, which is set in„Transmission delay„ in EEPROM of the OM Profibus card.
No data is downloaded unless the „Flag“ value is set to 1 and the „Function“ and„Address“ values are identical
in both telegrams (the received and the transmitted).
The values are in Float (4 byte) format.
2.2.5 CHANGE OF RELAY OUTPUTS LIMIT MARGINS
Under item „Number of relays“ you learn how many and which relay outputs does the current instrument
contain. The value is determined according to the significance of individual bits from 0 to 7 if the instrument
contains relays 1 to 8.
In case there are relay outputs in the instrument, the limit margins may be readjusted. For values of the limits 1
to 8 the required values are entered in the Float (4 byte) format. The value is sent to the instrument after setting
the relevant relay bit in „Relay mask“. After recording the mask shoud restore the 0 value..
2.2.6a PROJECTION OFTEXT IN OM XXX INSTRUMENTS
Every OM xxx instrument supporting Profibus includes the option of text projection on display. Projection is
performed in cycles with delay „Transmission delay“ by means of command „100“. Displayed are the characters
stored under „Display text“. Projection is performed for characters with code > 31. First character < 31 terminates
the text processing and thetext is sent to display. The stop character is tagged on to the previous character.
For projection of a 6 character text the text is displayed for approx. 2,5 sunless another command arrrives.
For projection of a text exceeding 6 character the text gets displayed for approx. 1minute.
For instruments with fewer than 6 characters the texts need to be completed from the front with gaps up to
6 characters.
2.2.6b PROJECTION OF NUMBERS IN OM XXX INSTRUMENTS
There are three options for projection of numbers in OM xxx instruments. Two apply solely for OM xxxRS instruments
(monitors andRS communication display devices).
1. Number projection (Float 4 byte) to set number of decimal places for a period of approx. 2,5 s.
Projection is performed through functions „10“ to „15“ (function „10“ = w/o d.p., „15“ = 5 decimal places).
Profibus card displays this data in cycles with inserted „Transmission delay“
2. Inserting and projecting decimal number (Float 4 byte) to OM xxx instrument through function „20“.
Number is sent to OM xxxRS instrument where the value is received and processesed:
Recalculates with the set minimum andmaximum,
May be recalculated with linearisation table, Mathematic function
evaluates limit statuses, sets the analog output,
projects the value in relevant format,
allows for changing the display colour in relation to value significance
The value stays projected in the instrument until another value is recorded or the instrument switches off.

USER MANUAL OM PROFI | 11
DESCRIPTION
OF COMMUNICATION .
. Inserting and projecting integer number (signed long  byte) to OM xxx instrument through function „“.
Number is sent to OM xxxRS instrument where the value is received and processed:
Recalculates with the set minimum andmaximum,
May be recalculated with linearisation table, Mathematic function
evaluates limit statuses, sets the analog output,
projects the value in relevant format,
allows for changing the display colour in relation to value significance
The value stays projected in the instrument until another value is recorded or the instrument switches off.
2.2.6c DOWNLOADING OF OM XXX INSTRUMENT IDENTIFICATION
Function „128“ enables to find out the identification of a connected OM xxx instrument with currently set
address. Identification is filled in under „Response OM xxx/Data“. Identification is obtained upon initialisation
after supply switch-on.
2.2.6d DOWNLOADING OF SW IDENTIFICATIONS OF OM PROFIBUS CARD
Function „132“ enables to find out the SW identification of OM Profibus card
e.g.: „V.1.1.2 - 11/16/07 16:47:20(B737)“ In brackets there is the check sum of the OM Profibus card program
memory
Identification is filled in under „Response OM xxx/Data“.
2.2.6e DOWNLOADING OF CHECK SUM OF THE EEPROM, STORED PARAMETERS OF OM PROFIBUS CARD
Function „133“ enables to find out the check sum of EEPROM memory, in which the OM Profibus card param-
eters are stored.
This function together with function „132“ always has to return the same information. In case the information
value changes, it is not certain the the OM Profibus card will function properly.
Check sum shall be filled in under „Response OM xxx/Data“.
2.2.6f DOWNLOADING OF COUNTER STATUS
Function „134“ enables finding out the service counters‘ statuses (number of switch-ons and total running time)
The counters status is filled in under „Response OM xxx/Data“. E.g.: „000012;000006“
2.2.7 WORKING WITH OM PROFIBUS CARD PARAMTERS INEEPROM
The card retains several parameters affecting communication via RS 485. These parameters are listed in the
table abpve.
The parameters may be changed, however, from manufacture they are set for optimum values for communica-
tion withOM xxx instruments. Parameters may be downloaded by entering address under „Function + EEPROM
Address“ and downloading from „Value fromEEPROM“ or by using function „131“.
The change is porformed by recording the new value under „Value to EEPROM“ and by storing an addressby128
higher to „Function + EEPROM address“. After the completion of recording the value into the EEPROM please
check that the value has been recorded correctly by reading out the „Value to EEPROM“. If all is correct, the
„Function + EEPROM address“ needs to be set to a number <128

12 | USER MANUAL OM PROFI
.
DESCRIPTION
OF COMMUNICATION
2.2.7 SENDING OM COMMANDS
For the sake of use of older types of OM instruments and use of further functions of the instruments the OM
Profibus card allows also for sending commands of a standard OM ASCII protocol. Functions „129“/„130“
and„229“/„230“ serve this purpose. The first two wait for response from OM xxx instrument and the others
do not wait.
Functions send out command recorded character by character under „OM Command“.Only characters with
code > 31 are sent out.
First character < 32 terminates the OM command processing and sends it out to the RS 485 line.
OM command is sent out after a change of function to one of the listed. The response will be stored under
„Response OM xxx/ Data“.
The lists of OM Instrument functions may be obtained from the OM Link program, which is available on the web
site of the company ORBIT MERRET, s.r.o...
http://www.merret.cz/en/home/search/om-link/podpora

USER MANUAL OM PROFI | 13
.
DESCRIPTION
OF COMMUNICATION

14 | USER MANUAL OM PROFI
TECHNICAL DATA.
PROFIBUS INTERFACE
Připojení: screw-in terminals
Standard interface EIA RS-485
Interface protocol ProfiBus-DP
Recommend. cable shielded twisted double-line
characteristic resistance: 135...165 Ω
cable capacity: < 30 pF/m
conductor cross section: > 0,32 mm2
loop resistance (2 wires): < 110 Ω/km
Transmission rate 9.6 kBit/s až 12000 kBit/s
Max. cable length 1200 m at baud rate 9.6 / 19.2 / 93.75 kBit/s
1000 m at baud rate 187.5 kBit/s
400 m at baud rate 500 kBit/s
200 m at baud rate 1500 kBit/s
100 m at baud rate 3000/6 000/12 000 kBit/s
Flexible connection permitted up to transmission rate of max. 1500
kBit/s, for security purposes should not be used
for transmission rates higher than 500 kBit/s
Insulation resistance for pollution degree II, meas.category III.
> 300 V(ZI), 150 V(DI)
Status projection 3 LED (on the communication card)
No. of participants in one network segment (master/slave): max. 32
No. of participants when repeaters used: max. 126
INTERNAL COMMUNICATION
Baud rate 600 Bit/s to 115 200 Bit/s (default 9600)
How often 0,1sto 17s + communication time according to Baud
rate (default 0,6s)
PROFINET INTERFACE
Connection 2x RJ45, isolated
Interface protocol ProfiNet
Transmission rate 100 MBit / s
Insulation resistance for pollution degree II, meas.category III.
> 300 V(ZI), 150 V(DI)

ORBIT MERRET, spol. s r. o.
Vodňanská 675/30
198 00 Praha 9
Czech Republic
tel.: [phone]
fax.: [phone]
[e-mail]
www.orbit.merret.eu
TECHDOK - OM Pro - . - en