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USER MANUAL

OM PROFI

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13

2.

DESCRIPTION

OF COMMUNICATION

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Summary of Contents for OM PROFI

Page 1: ...OM PROFI PROTOCOL DESCRIPTION COMMUNICATIONS PROFIBUS PROFINET USER MANUAL Outstanding Measurement Value ...

Page 2: ...e 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 Thedeviceisnotintendedforinstallationinexplosiveareas Usethedeviceonlyoutsidetheexplosiveareas DANGER WARNING ATT...

Page 3: ...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 wi...

Page 4: ... 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 Requirem...

Page 5: ...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 ...

Page 6: ... 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 n...

Page 7: ...mit 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 2 Byte 1 Identified number of connected OM xxx instruments used only with OMX Profibus...

Page 8: ...dr 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 4 132 TimeOut Profibus 76 aprox 5 s Delay for reporting errors in communication to ProfiBus X 66 ms inaccuracy from X 1 to X 5 133 Transmiss delay 8 aprox 0 6 s Delay used for downloading in cycles or display projection ...

Page 9: ...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 ...

Page 10: ...ssion 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 proje...

Page 11: ...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 Respo...

Page 12: ...rument 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 fun...

Page 13: ...USER MANUAL OM PROFI 13 2 DESCRIPTION OF COMMUNICATION ...

Page 14: ...0 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 repea...

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Page 16: ...ORBIT MERRET spol s r o Vodňanská 675 30 198 00 Praha 9 Czech Republic tel 420 281 040 200 fax 420 281 040 299 orbit merret eu www orbit merret eu TECHDOK OM Profi 2020 3 en ...

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