Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas
Contents
1. 1 3287 3367 2487 ros Burst used 3266 3267 316 Burst used 316 52 0004 0002 Rev C Y Omni Page 12 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Table 9 32 Bit IEEE Floating Points Real Time Data for Meter Run Number for Meter Run Number Maximum flow deviation 17513 17613 17713 17813 Path 2 Velocity of sound 17529 17629 17729 17829 Maximum VOS deviation 17516 17616 17716 17816 Path 3 Velocity of sound 17530 17630 17730 17830 Velocity of sound VOS 17521 17621 17721 17821 Path 4 Velocity of sound 17531 17631 17731 17831 17735 17835 17537 17637 1773 176381773 Table 10 32 Bit IEEE Floating Pints Previous Hour s Average Data Database Address NENNEN REE SW 52 0004 0002 Rev C us Omni Page 13 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Table 11 32 Bit IEEE Floating Points Previous Day s Average Data Database Address for Meter Run Number NENNEN BEEE Notes Tnn Transducer nn Table 12 Flow Computer Configuration Data Miscellaneous Meter Run Configuration BameseAddes Database Address Flowmeter device type 3108 3208 3308 3408 Flow direct O frwd 1 rvrs 3155 3255 3355 3455 Maximum downtime min 3116 3216 3316 3416 Flow pulse freq 1 0 pnt 13001 13014 13027 12. Signal Ground a z NPN Transistor Figure 3 Example of wiring a Kongsberg Metering MPU 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data live forward flow signal and pulse fidelity and integrity checking e 52 0004 0002 Rev C NS Omni Page 8 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Forward amp Reverse Flow with Dual Pulse Fidelity amp Integrity Checking Figure 4 shows a typical wiring installation between the MPU 1200 and an OMNI 6000 of serial data and both forward and reverse flow signals with connections for pulse fidelity and integrity checking In this example the OMNI Flow Computer has E modules in slots TB5 and TB6 and an SV module in slot TB7 KONGSBERG MPU 1200 ULTRASONIC FLOWMETER Terminal Block E Combo Module Power Terminals Terminals TB5 TB11 Pulse Out 1 Pulse Out 1 Pulse Out 2A 4 2 2K to 10K Ohm Pulse Out 2B E Combo Module Terminals TB6 2 2K to 10K Ohm Signal Return SV Combo Module Terminals TB7 Internal Connection 425 TxD RxD 7 Signal Ground a NPN Transistor Figure 4 Example of wiring a Kongsberg Metering MPU 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data live forward and reverse flow signals and pulse fidelity and i
3. Forward Flow Reverse Flow Line Pressure Line Temperature Internal Pipe Diamter Rate Corr Factor A Neg Dir Rate Corr Factor B Neg Dir Rate Corr Factor A Pos Dir Rate Corr Factor B Pos Dir Flow Velocity Cut off Limit Alarm Status FlowV PO m s FlowV P1 m s FlowV P2 m s FlowV P3 m s FlowV P4 m s FlowV P5 m s VOS PO m s VOS P1 m s VOS P2 m s VOS P3 m s VOS P4 m s VOS P5 m s Burst P0 11 XXX XXX Burst P1 10 XXX XXX Burst P2 9 XXX XXX Burst P3 8 XXX XXX Burst P4 7 XXX XXX Burst P5 6 XXX XXX Burst P6 5 XXX XXX Burst P7 4 XXX XXX Burst P8 3 XXX XXX Burst P9 2 XXX XXX Burst P10 1 XXX XXX Burst P11 0 XXX XXX Gain P0 11 XXXX XXXX Gain P1 10 XXXX XXXX Gain P2 9 XXXX XXXX Gain P3 8 XXXX XXXX Gain P4 7 XXXX XXXX Gain P5 6 XXXX XXXX Gain P6 5 XXXX XXXX Gain P7 4 XXXX XXXX Gain P8 3 XXXX XXXX Gain P9 2 XXXX XXXX Gain P10 1 XXXX XXXX Gain P11 0 XXXX XXXX 52 0004 0002 Rev C NS Omni Page 15 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters SV Module Serial Port NOTE SV Port Data Display The SV port data that is displayed on OMNI screens is specific to each SV port only as acquired from the MPU 1200 MPU 1200 Serial Port Settings To communicate with the OMNI 3000 6000 set the MPU 1200 as follows Setting Assign Baud Rate 19 2K bps Data Bits 8 Stop Bits 1 Parity None Modbus ID 1 Units of Measure Displayed on OMNI
4. will cause an alarm e Velocity of Sound VOS in Gas Deviation Percent from Average This entry is the maximum percent that the VOS of any individual path can vary from the average VOS of all the paths An alarm occurs if the percent of deviation of one or more paths exceeds this value e AGA 10 VOS Deviation available with Firmware v23 74 11 and v27 74 11 The maximum percent that the VOS of any individual path can vary from the AGA 10 calculated VOS of all the paths An alarm occurs if the percent of deviation of one or more paths exceeds this value e Maximum Flow Deviation Percent If there is a valid flow I O point assigned this is the percent of deviation between the calculated flow from the pulse input channel compared to the MPU 1200 flow data received via the OMNI SV serial port The OMNI Flow Computer raises the pulse suspect alarm if the flow deviation percentage exceeds this limit e Maximum Meter Downtime Enter the maximum allowable MPU downtime in minutes If communication downtime between the OMNI Flow Computer and the MPU is less than this value the OMNI Flow Computer will adjust its internal totalizers to match the most recent MPU 1200 totalizer value 52 0004 0002 Rev C Omni Page 11 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters OMNI 3000 6000 Database Addresses amp Index Numbers Tables 7 thru 13 list the Modbus database addresses assigned wi
5. 1200 ULTRASONIC FLOWMETER Terminal Block A Combo Module Power Terminals Terminals TB5 TB11 Pulse Out 1A Pulse Out 1A Pulse Out 2A Pulse Out 2A 2 2K to 10K Ohm Bille e So o Return 4 Terminal Block SV Combo Module X5 Terminals TB6 7 12 Internal 712 Connection 3 TxD RxD 4 TxD RxD 426 27 NPN Transistor Signal Ground Figure 2 Example of wiring a Kongsberg Metering MPU 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data and live forward and reverse flow signals without pulse fidelity and integrity checking e 52 0004 0002 Rev C NS Omni Page 7 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Forward Flow Only with Dual Pulse Fidelity amp Integrity Checking Figure 3 shows a typical wiring installation between the MPU 1200 and an OMNI 6000 of serial data and forward flow signal with connections for pulse fidelity and integrity checking In this example assume that the OMNI Flow Computer has an E module plugged into slot TB5 and an SV module in slot TB6 KONGSBERG MPU 1200 ULTRASONIC FLOWMETER Terminal Block E Combo Module Power Terminals Terminals TB5 TB11 Pulse Out 1 Pulse Out 1B 2 2K to 10K Ohm Terminal Block SV Combo Module X5 Terminals TB6 r 123 TxD RxD Internal 124 Connection 125 TxD RxD
6. OMNI User Manual and the Technicla Bulletin 960701 52 0000 0001 Overview of OMMICOM Configuration PC Software Use either the flow computer s front panel keypad or OMNICOMQ configuration PC software to enter configuration settings The configuration settings specific to the MPU 1200 flowmeter are under the Miscellaneous Configuration Meter Run menu and the Meter Run Setup menu Enter the miscellaneous meter run settings first and then proceed to the meter run setup entries Miscellaneous Meter Run Configuration Settings The following miscellaneous configuration meter run settings correspond to the MPU 1200 ultrasonic gas flowmeter e Flowmeter Device Type For each meter run enter 6 to select the Kongsberg Metering MPU 1200 flowmeter as the device type e Flow I O Point Enter the input channel number that is used to input the ultrasonic flowmeter pulse signal Assign flowmeter pulse signals only to Input Channels 3 and 4 of A and E combo modules and input channel 3 of a B combo module e Dual Pulse Fidelity amp Integrity Checking Enter Y to enable pulse fidelity and security checking for each meter run Enter N to disable dual pulse fidelity checking e SV Module Port The OMNI Flow Computer can accept two SV combo modules With one SV module two SV ports are available and with two SV modules four ports are available For each ultrasonic meter run enter the SV port number 1 to 4 to which the SV
7. Path 4 m s Velocity of Sound Path 5 m s Burst T00 gt T11 XXX XXX Burst T01 gt T10 XXX XXX Burst T02 gt T09 XXX XXX Burst T03 gt T08 XXX XXX Burst T04 T07 XXX XXX Burst T05 gt T06 XXX XXX Burst T06 gt T05 XXX XXX Burst T07 gt T04 XXX XXX Burst T08 gt T03 XXX XXX Burst T09 gt T02 XXX XXX Burst T10 gt T01 XXX XXX Burst T11 gt T00 XXX XXX Gain TOO gt T11 XXXX XXXX Gain TO12T10 XXXX XXXX Gain 0 2 gt 09 XXXX XXXX Gain T03 gt T08 XXXX XXXX Gain T04T07 XXXX XXXX Gain T05 gt T06 XXXX XXXX Gain T06 gt T05 XXXX XXXX Gain T0O7 gt T04 XXXX XXXX Gain T08 gt T03 XXXX XXXX Gain TO9 gt T02 XXXX XXXX Gain T10 gt T01 XXXX XXXX Gain T11 gt T00 XXXX XXXX e 52 0004 0002 Rev C Omni Page 17 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters DOCUMENT REVISION HISTORY DOCUMENT INITIAL RELEASE DATE 30 January 2002 REVISION DATE PURPOSE CHANGE REQUEST A 30 January 2002 Maintained on the web Initial release B 26 February 2003 Maintained on the web C 10 March 2009 DCR 090080 52 0004 0002 Rev C Y Omni Page 18 of 18
8. 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data and live forward and reverse flow signals without pulse fidelity and integrity 7 Figure 3 Example of wiring a Kongsberg Metering MPU 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data live forward flow signal and pulse fidelity and integrity CHECKING jj eb tele ieu sexa utat tata exta te 8 Figure 4 Example of wiring a Kongsberg Metering MPU 1200 ultrasonic flowmeter to an OMNI 6000 Flow Computer with connections for serial data live forward and reverse flow signals and pulse fidelity and integrity CiecKIrig eire 9 52 0004 0002 Rev C Omni Page 2 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Scope This Technical Bulletin applies to firmware revisions 23 74 and 27 74 of OMNI 3000 6000 Flow Computers for gas flow metering systems Abstract Ultrasonic gas flowmeters determine the linear gas velocity through the meter tube by using multiple acoustic pulse reflection paths These meters analyze the acoustic paths employing an upstream downstream transit time measurement method The OMNI Flow Computer totalizes either the flowmeter pulse input signal or the actual uncorrected volume data received from the MPU 1200 Series A and S
9. 2 0004 0002 Rev C NS Omni Page 4 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters If a pulse signal from the MPU 1200 is not available and the communication link fails the flow computer immediately stops totalizing Once communication is reestablished the OMNI Flow Computer will adjust its internal totalizers to include volume flow indicated by the MPU 1200 totalizer In this case the OMNI Flow Computer may have to add a significant amount of flow to its totalizers depending upon how much time the communication link was inoperative In some instances adjusting the flow computer s totalizers may not be desirable e g if a flowmeter has been disconnected for a long period of time or the MPU 1200 electronics package has been replaced For these cases there are flow computer configuration settings that specify the maximum time that an MPU 1200 serial communication failure can exist and still be compensated by adjusting the flow computer totalizers default maximum time is 15 minutes Wiring Installation NOTE Setting Up and Wiring to OMNI Combo Modules In order to communicate with MPU 1200 ultrasonic flowmeters the OMNI Flow Computer must be equipped with at least one 1 SV combo module Model 68 6203 For instructions on jumper settings and other process I O combination module setup information refer to Volume 1 Chapter 2 of the OMNI User Manual Serial Data Communications The serial inte
10. 3000 6000 must have firmware that supports the same units of measure i e both devices either have metric firmware or U S firmware The types of units are Variable US Metric Temperature F C Presssure abs PSla Bara Totals ft m Flow Rate ft h m h Velocity ft s m s You can view live data received via RS 485 communications on the flow computer front panel LCD display only if a SV port is used to input the RS 485 interface from the MPU 1200 flowmeter To view this raw data press Setup n Display on the OMNI front panel keypad when in the Display Mode n equals the SV port number 1 to 4 The following data displays 9 52 0004 0002 Rev C Omni Page 16 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters SV Port MPU 1200 Software Revision Log Data Count Flow Velocity Actual Volume Flowrate Forward Flow Reverse Flow Line Pressure Absolute Line Temperature Internal Pipe Diamter Rate Corr Factor A Neg Dir Rate Corr Factor B Neg Dir Rate Corr Factor A Pos Dir Rate Corr Factor B Pos Dir Flow Velocity Cutoff Limit Alarm Status Flow Velocity Path 0 Flow Velocity Path 1 m s Flow Velocity Path 2 m s Flow Velocity Path 3 m s Flow Velocity Path 4 m s Flow Velocity Path 5 m s Velocity of Sound Path 0 m s Velocity of Sound Path 1 m s Velocity of Sound Path 2 m s Velocity of Sound Path 3 m s Velocity of Sound
11. 3040 SV module port 3153 3253 3353 3453 MPU 1200 Series A or B 3154 3254 3354 3454 0 Series A 1 Series B Table 13 Flow Computer Configuration Data Meter Run Setup BaaseAddess Database Address Minimum burst used 17715 17616 17716 17816 SW 52 0004 0002 Rev C Omni Page 14 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters OMNI 3000 6000 User Displays NOTE Meter Run Data Display The meter run data that is displayed on OMNI screens corresponds to the SV port number the user assigned to each meter run during OMNI Flow Computer configuration refer to Section OMNI 3000 6000 Configuration Miscellaneous Meter Run Configuration Settings Units of Measure Displayed on OMNI 3000 6000 Screens Both the MPU 1200 and the OMNI 3000 6000 must have firmware that supports the same units of measure i e both devices either have metric firmware or U S firmware The types of unites are Variable US Metric Temperature F C Pressure abs PSla Bara Totals f m Flow Rate f h m h Velocity ft s m s Meter Run Data To view the meter run data on the flow computer LCD display press Meter n Display on the OMNI front panel keypad when in the Display Mode n equals the meter run number 1 to 4 The following data will display METER 7 Log Data Count Software Revision Flow Velocity Actual Volume Flowrate Velocity of Sound
12. Last Updated 10 March 2009 TB 010701C Technical Bulletin Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters OMNI FLOW COMPUTERS INC 2 SW e 12620 West Airport Boulevard Suite 100 US Omni Sugar Land Texas 77478 United States of America Phone 281 240 6161 Fax 281 240 6162 www omniflow com 52 0004 0002 Rev C TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters NOTE User Manual Reference This Technical Bulletin complements the information contained in the User Manual applicable to Revision 23 74 27 74 Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters The Kongsberg Metering MPU 1200 ultrasonic flowmeter measures gas flow by using an upstream downstream transit time method of acoustic pulses This device communicates with OMNI Flow Computers via OMNI s SV process I O combo module using a proprietary Modbus protocol To use the scaled pulse output of the Kongsberg Metering the flow computer must have either an A B or E combo module installed Table of Contents Moos m et He ERR 3 3 MPU 1200 Ultrasonic Flowmeter Theory of Operation 3 OMNI Flow Comite FLO GIG RT 3 Wiring ox du 5 OMNI Combo Module Terminal Assignments sssssssssss
13. MPU 1200 to connect to the OMNI Flow Computer Tables 4 and 5 specify the terminal assignments for each of these terminal blocks This information is necessary when connecting wires to the MPU 1200 Table 4 MPU 1200 Terminal Block X8 Assignments Signal Description Output Channel 1A Frwrd Flow Pulses Open Collector NPN Output Channel 1A Frwrd Flow Pulses Return Output Channel 1B Frwrd Flow Pulses Open Collector NPN Output Channel 1 Frwrd Flow Pulses Return Output Channel 2 Rvrse Flow Pulses Open Collector NPN 6 output Channel 2A Rwse Flow Pulses Output Channel 2 Rvrse Flow Pulses Open Collector NPN s Output Channel 26 Rvrse Flow Pulses o Flow Directions SW 52 0004 0002 Rev C us Omni Page 6 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Table 5 MPU 1200 Terminal Block X5 Assignments Signal Description 23 rransmit Receive Data TxD RxD 24 Termination Negative 25 Transmit Receive Data TxD RxD 26 Termination Positive Signal Ground Forward amp Reverse Flow Signals Figure 2 shows a typical wiring installation between the MPU 1200 and an OMNI 6000 for serial data and both forward and reverse flow signals In this example assume that the OMNI has an A module plugged into slot TB5 and an SV module in slot TB6 KONGSBERG MPU
14. Pulse I O Assigned 2 Clear Pulse Signal Suspect Alarm k Yes Calculate Flowrate Based on Pulses Compare Flowrate Based on Pulses to Serial Data Flowrate Is Flowrate Based on Pulses within Limits No Set Pulse Signal Suspect Alarm Clear Pulse Signal Suspect Alarm Totalize Flow Based on J Transmitted Serial Data Figure 1 Flow Computer Logic Flow Diagram for the MPU 1200 Ultrasonic Gas Flowmeter If there is communication failure between the two 2 devices the OMNI Flow Computer will not receive serial data However the MPU 1200 may be fully operational and continue to accumulate volume In this case if a pulse signal is available from the MPU 1200 the OMNI Flow Computer will automatically continue to accumulate flow based on this flow pulse train When normal communications resume the flow computer will validate and adjust its internal totalizers if necessary to match the volume indicated by the MPU 1200 internal totalizer The flow computer automatically adjusts its totalizers to account for the small amount of flow that takes place before it detects that a communication failure has occurred i e when the serial link fails the OMNI Flow Computer does not immediately start totalizing using the MPU 1200 pulse train because it takes several seconds to determine if a failure has occurred e 5
15. eeeeeeeeneneennen nnn 5 MPU 1200 Terminal Assignments ss cesse eee ema Rede 6 Forward amp Reverse Flow Signals edi b i e red usine 7 Forward Flow Only with Dual Pulse Fidelity amp Integrity Checking 8 Forward amp Reverse Flow with Dual Pulse Fidelity amp Integrity Checking 9 MPU 1200 Configuration ort Free Ska eae eene ade teta uU ee tube based tees 10 Miscellaneous Configuration Settings 10 Serial Port sells eet t ond qux deu Ur 10 OMNI 3000 6000 petet ser as ode todas nette he Raten n 10 Miscellaneous Meter Run Configuration Settings 10 Meter Ruin Setup Enll 8S 525 cep oou beg deal Dre idees Mode dea 11 OMNI 3000 6000 Database Addresses amp Index Numbers 12 OMNI 3000 6000 lJs r DISplaysS dns Soars rer tabe hep dens dett esp been den eus eam fede 15 Meter Hur Bald e pero pra Eust ete ete ur ence beet E e hdd i 15 SV Module Seral POL o o Ete HP beatae doshas Eu RR RR Meo edere ter eT aed 16 Figures Figure 1 Flow Computer Logic Flow Diagram for the MPU 1200 Ultrasonic Gas Flowmeter 4 Figure 2 Example of wiring a Kongsberg Metering MPU
16. eries B MPU 1200 Ultrasonic Flowmeter Theory of Operation Kongsberg s Ultrasonic Gas Flow metering Technology incorporates multiple pairs of transducers into a smart digital inferential instrumentation device This device is installed into a gas pipeline system to measure gas flow Each pair of transducers emits ultrasonic acoustic pulses that travel bi directionally to and from each transducer in the pair The MPU 1200 has six 6 pairs of transducers positioned across it so that the path between each transducer has an axial component i e one transducer is upstream relative to the other When the downstream transducer emits an ultrasonic pulse that is slowed down by the velocity of the fluid the pulse takes longer to travel to the upstream transducer than with no flow When the upstream transducer emits a pulse that is aided by the velocity of the fluid the pulse takes less time to travel to the downstream transducer Ultrasonic flowmeters that apply transit time methodology such as the MPU 1200 measure these two 2 transit times to determine both the velocity and the speed of sound of the fluid The flowmeter can measure gas velocity for bi directional forward reverse fluid flow OMNI Flow Computer Logic The OMNI Flow Computer can determine the actual flow rate from data received either serially from the MPU 1200 flowmeter or from a live pulse frequency signal input if it has been connected assigned and configured In this applica
17. hich the module is plugged Table 1 OMNI SV Combo Module Back Panel Terminal Assignments TBn jrerce2 a 85 485 A Wire O O s Return for 4 20mA Analog Outputs analog Outputs 6r 4 20m amp L s analog Note Numbers in parenthesis referto SV modue 2 52 0004 0002 Rev C Y Omni Page 5 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Table 2 OMNI E Combo Module Back Panel Terminal Assignments TBn 4 Input Channel 2 Isolated Signa Return 6 Channel 4 Flowmeter Pulses s RTD Excitation Current Source Output 2 9 RTD Excitation Current Source Output 1 La RI Return for Terminals 5 6 7 8 9 11 amp 12 Internally connected to DC power return Table 3 OMNI A Combo Module Back Panel Terminal Assignments TBn 4 channel 2 Isolated Signal Return s input channel 3 Isolated Signal Return s channel 4 Isolated Signal Return s RID Excitation Current Source Output 1 Signal Return for Terminals 9 11 amp 12 Internally connected to DC power return 11 Analog Output 1 4 20mA 12 Analog Output 2 4 20mA or RTD Excitation Current Source Output 2 See JP12 Setting MPU 1200 Terminal Assignments Use the X8 and X5 terminal blocks in the
18. module s RS 485 serial interface input from the MPU 1200 flowmeter is wired to the OMNI Flow Computer 52 0004 0002 Rev C Y Omni Page 10 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters e MPU Series Y N The OMNI Flow Computer can communicate with the Series A flowmeter and beginning with v23 74 30 and v27 74 20 firmware can also communicate with the Series B flowmeter Specify N for Series A or Y for Series B e Flow Direction MPU 1200 flowmeters allow for bi directional fluid flow measurement For pulse frequency signals setup the flow computer to totalize either forward or reverse flow on any meter run with an ultrasonic flowmeter Meter Run Setup Entries NOTE Velocity of Sound The velocity of sound VOS refers to the amount of time it takes an acoustic pulse to travel along the gas ultrasonic paths The VOS will vary depending upon gas type and line conditions The following meter run setup entries are available for the MPU 1200 ultrasonic flowmeter when using pulse frequency signals e Maximum Required Gain Value The flow computer monitors the maximum gain value for each ultrasonic path in both directions An alarm occurs if the gain of any path rises above this value e Minimum Burst Percent Used This entry checks the ratio of valid ultrasonic pulses received versus total pulses transmitted for each ultrasonic path in both directions A ratio below this setting
19. ntegrity checking e 52 0004 0002 Rev C NS Omni Page 9 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters MPU 1200 Configuration NOTE MPU 1200 Documentation Always refer to the official documentation supplied by FMC Kongsberg when installing configuring and operating the MPU 1200 ultrasonic flowmeter The following MPU 1200 miscellaneous configuration and serial port settings are critical in communicating with the OMNI Flow Computer Miscellaneous Configuration Settings Following are the corresponding MPU 1200 database object settings e Database Type Object Number 788 For Series A flowmeters always set to 1 where 0 32 bit single precision and 1 64 bit double precision floating point database The Series B flowmeter database is fixed at 32 bit single precision e Units of Measure Object Number 798 Set to the same units of measure as OMNI 3000 6000 firmware where 0 metric and 1 Imperial US units Serial Port Settings The MPU 1200 connects to an external system using the Modbus protocol via a serial line This connection is a 2 wire RS 485 serial link You must also configure the MPU 1200 serial port Table 6 Table 6 MPU 1200 Serial Port Settings 19 2K bps OMNI 3000 6000 Configuration NOTE OMNI 3000 6000 Documentation Reference For instructions on configuring the OMNI Flow Computer refer to Chapter 2 Flow Computer Configuration in Volume 3 of the
20. rface between these devices and 2 wire RS 485 mode utilizing a modified Modbus protocol There are several options for wiring an MPU 1200 ultrasonic meter to an OMNI Flow Computer The option to implement depends upon requirements of the flow metering system Connect these devices via the 2 wire RS 485 serial interface from the MPU 1200 to an OMNI SV combo module serial port This connection uses the Modbus protocol to transmit the volumetric flow data that the MPU 1200 accumulates to the OMNI Flow Computer In addition to serial data the OMNI Flow Computer can also receive live forward and or reverse flow pulse signals from the MPU 1200 The MPU 1200 transmits pulse frequencies through wires typically connected to an OMNI E combo module Connecting two 2 MPU 1200 pulse output channels to the OMNI Flow Computer can provide pulse fidelity and integrity checking To perform pulse fidelity checking the OMNI Flow Computer must have one 1 E combo module for each flowmeter and flow direction forward reverse requiring totalizing OMNI Combo Module Terminal Assignments Depending upon the implemented wiring option the OMNI Flow Computer requires SV E and or A combo modules Tables 1 thru 3 specify the terminal assignments for each module type This information is necessary when connecting wires to the OMNI Flow Computer The terminal block number TBn on the OMNI back panel for each combo module corresponds to the slot on the motherboard into w
21. thin OMNI Flow Computer firmware to the MPU 1200 ultrasonic metering feature These tables categorize data types Table 7 Meter Run Alarm Status Points Real Time Data BameseAddes Database Address p s s5 1l2 5 2377 2477 2179 2279 2379 2280 238 2483 01 Burst alarm 2170 2270 2370 2470 Notes vos gt Velocity of Sound T02 Burst alarm 2171 2271 2371 2471 C Tnn gt Transducer nn 1 This status alarm is active and logged in the OMNI 3000 6000 when Object No 5 of the MPU 1200 Modbus database is a non zero value 2 This configuration alarm is active when Object No 788 of the MPU 1200 Series Modbus database is set to 0 zero enabling the 32 bit single precision floating point database For the Series A flowmeter to communicate with the OMNI 3000 6000 this object must always be set to 1 enabling the 64 bit double precision floating point database The Series B flowmeter is fixed at 32 bit single precision floating point database see MPU 1200 Configuration Miscellaneous Configuration Settings in this Technical Bulletin Table 8 16 Bit Integer Registers Real Time Data BameseAddess Database Address Oo BEEE EBEE 01 Burst used TO2 Burst used TO3 Burst used TOS Burst used ros iss 3285 3385 3485 ros Burst used 3364 3464 Gain 3166 3286 336 2486 107 Burst used 3365 3465
22. tion Modbus serial communication is the primary measurement source The pulse frequency signal serves as a backup flow measurement should the Modbus serial communication link fail or be disconnected Figure 1 The MPU 1200 serially transmits the accumulated volume to the OMNI The flow computer obtains a calculated volume increment by subtracting the new accumulated volume from the last accumulated volume it received The MPU 1200 flowmeter updates its totalizers on a regular interval depending upon flowing conditions and configuration settings Updating the OMNI totalizers on this same interval would result in somewhat erratic totalizers and sampler pulse outputs which could upset other equipment connected to the flow computer The OMNI therefore provides a smooth totalizer update by monitoring the time interval between MPU 1200 totalizer updates and distributing the volume increment over a matching time interval 52 0004 0002 Rev C Omni Page 3 of 18 TB 010701C Communicating with Kongsberg Metering MPU 1200 Ultrasonic Gas Flowmeters Are MPU No Set MPU Communications Communication OK Failed Alarm Clear MPU E Qc RM Pulse Clear Pulse Signal Assigned Suspect Alarm Failed Alarm E No Transmitter No Flowrate in Correct gt Disable Totalizing TS Direction P 9 y Set Meter Run Not Active Is
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