Recalculating a Previous Batch within the Flow Computer
Contents
1. 141 5 SG60 131 5 e SG60 141 5 API60 131 5 Modbus Communication Summary NOTE Setting these registers via Variable Statements is not allowed and will not produce the expected results The flow computer retains data for the last four 4 completed batches Only one 1 set of this data can be accessed ata time Pointer registers 3134 Meter Run 1 3234 Meter Run 2 3334 Meter Run 3 3434 Meter Run 4n and 3879 for Meter Station are used to determine what set of batch data will be accessed API60 SG60 and S amp W data can be adjusted and the batch recalculated by writing a 1 to points 1756 for Meter Run 1 1757 for Meter Run 2 1758 for Meter Run 3 1759 for Meter Run 4 and 1798 for Meter Station D Omni 52 0000 0009 Rev C w Page 7 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer DOCUMENT REVISION HISTORY DOCUMENT INITIAL RELEASE DATE 0 cccceeceeceeeceeceeeceeceeeeeeeeees 23 Feb 1998 REVISION DATE PURPOSE CHANGE REQUEST A 23 Feb 1998 Maintained on the Web Initial release B No Record Maintained on the Web C 03 June 2009 DCR 090040 52 0000 0009 Rev C Y Omni Page 8 of 82. Batch Recalculation Applies to Versions 22 74 and 26 74 Tables 5 and 6 NOTE Always write to 3n51 or 3879 to specify the number of retroactive bbls m3 to recalculate before writing to any of the above Modbus Points Table 5 Meter Registers METER 1 METER 2 METER 3 METER 4 REGISTERS REGISTERS REGISTERS REGISTERS Previous 4 Batches 3134 Previous 3234 Previous 3334 Previous 3434 Previous per meter run are 4 batches 4 batches 4 batches 4 batches held in each of the 1 last batch 1 last batch 1 last batch 1 last batch 3n51 registers 4 oldest 4 oldest 4 oldest 4 oldest oan Density Re 8508 8608 8708 8808 emp API60 8515 8615 8715 8815 BS amp W 8514 8614 8714 8814 Recalculate amp Print Edge Tiggered 1756 1757 1758 1759 52 0000 0009 Rev C Omni Page 6 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer Table 6 Station Registers Previous 4 Batches for Station are in 3879 Version 22 74 1 last batch 4 oldest 99 3 SG60 Density Ref Temp N A API60 N A BS amp W N A Recalculate amp Print edge Tiggered 1798 NOTE When recalculating a previous batch and adjusting the gravity of the product using Modbus transactions you must write both updated SG60 and equivalent API60 gravity values before sending the Recalculate and Print command API SG conversion equations as follows e API60
3. First batch ended 23450 12340 0 0 0 3 Second batch ended 34560 23450 12340 0 0 4 Third batch ended 45670 34560 23450 12340 0 5 Fourth batch ended 56780 45670 34560 23450 12340 6 Fifth batch ended with 6123 56780 45670 34560 23450 sixth batch running Previous Batch Data that Is Read Writable All data points shown in Table 2 for previous batch transactions are read write Table 2 Previous Batch Transactions D METER 1 METER 2 METER 3 METER 4 STATION SG 60 or Reference Density Rev 24 71 8508 8608 8708 8808 8908 API 60 Gravity 8519 8619 8719 8819 8919 Sediment and Water Percentage BS amp W 8517 8617 8717 8817 8917 Command Boolean which 5756 2757 2758 2759 1798 triggers the recalculation Batch Recalculation Modbus Registers Meter n Batch Recalculation Versions 20 74 and 24 74 Tables 3 and 4 Table 3 Meter Registers METER 1 METER 2 METER 3 METER 4 REGISTERS REGISTERS REGISTERS REGISTERS Previous 4 Batches 3151 Previous 3251 Previous 3351 Previous 3451 Previous per meter run are 4 batches 4 batches 4 batches 4 batches held in each of the 1 last batch 1 last batch 1 last batch 1 last batch 3n51 registers 4 oldest 4 oldest 4 oldest 4 oldest SG60 Density Ref Temp 8508 8608 8708 8808 API60 8519 8619 8719 8819 BS amp W 8517 8617 8717 8817 Recalculate amp Print Edge Tiggered 2758 2757 2758 2759 NJ 52 0000 0009 Rev C w O
4. Last Updated 03 June 2009 TB 980202C Technical Bulletin Recalculating a Previous Batch within the Flow Computer OMNI FLOW COMPUTERS INC js 1 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 0000 0009 Rev C TB 980202C Recalculating a Previous Batch within the Flow Computer NOTE User Manual Reference This Technical Bulletin complements the information contained in Volume 2 Chapter3 Computer Batching Operations applicable to Revision 20 24 74 and 22 26 74 The symbol following the firmware revision numbers indicates that all future revisions beyond the stated revision are covered by this bulletin Batch Recalculation The batch recalculation feature allows you to adjust quantities of the previous four 4 batches at measurement locations where SG60 API60 and S amp W values only become available after the batch has been delivered Table of Contents DSCOPCS a A E EE E a hid hates dene dcedennetednencereuwenrtyensdendbentatian cata tenalonet ADSU ACE E E EEE E EE E tes Cais dei ta deavaeiehdacanity chu Skaevacatvevevevucds Calculations Performed isinai paa EE EEREN EEEE KEE AEREA RE a aeb aai Using the Flow Computer Keypad to Recalculate a Previous Batch Ticket sssssssenrrrrrrrreen USP ee Sateen fe readies olettan rte EA aa te namac sane inate E tat Aosta toh cata toda aha ee nla b
5. acement Coriolis Liquid Flow Metering Systems with K Factor Linearization Firmware Revisions 22 74 and 26 74 have a similar feature However the Modbus Data Points used to access data are different from those in Revisions 20 2 74 Abstract The purpose of recalculating a previous batch is to make batch quantity corrections based on SG60 API60 and Sediment and Water data becoming available via sample analysis performed after a batch delivery is complete At measurement locations where SG60 API60 and S amp W values are not available online sampler devices continuously extract a representative sample of fluid during a batch At the end of the batch the sample container is sent for lab analysis The data obtained from the analysis report can then be used to recalculate the batch correction factors and therefore batch quantities Historical data from these analysis reports is also used to determine what values of SG60 API60 should be used for real time calculation of future batches that are known to have similar characteristic These batches ultimately can also be recalculated when their actual analysis is determined Calculations Performed The liquid correction factors Ctl and Cpl are first recalculated using the sample analysis SG60 API60 and the batch flow weighted average temperature and pressure calculated during the batch Gross Standard Volume GSV is recalculated using the newly calculated Ctl and Cpl The Sediment and Water correction fac
6. e DUS Pe Zire sirein Rete toed ec Peden ddr Bornean e ean a dena ened E A eee DISD Iei ohne acter ane e a aa a bene eee ae aed cae aa a a a a E a e de aea 4 Step 4 aate e a r E a E R 4 SIG OA AE A E S E E A E E T 4 How the Flow Computer Manages the Modbus Database ceseeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenaaas 4 Previous Batch Data that Is Read Writable cccccccccccccccceecceeeeeeeceeeeeeeeceeeceeeeeseeeeeeeeeeeeeeetess Batch Recalculation Modbus Registers Meter n Batch Recalculation cccecceeeceeeeeeeeeees Versions 20 74 and 24 74 Tables 3 and 4 cccecceseccceeeeeeeeeeeceseeeeeeeeneeneseesececeneeeteseeneenes Modbus Communication SUMMANyY ssssssssssseeeessssseittrtettttttttittttttttttttttttttteetttttinnnnnssstnnnnnnnnnnnne nenea Meter n Batch Recalculation ccccccccccccceccceeeceeeceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeteeeeneeeens Applies to Versions 22 74 and 26 74 Tables 5 and 6 eeeseeseeeeeesesseerrerrrrsssssrrrrrrrnssssseeee Modbus Communication SUMMANyY stncsaienctare ds tts honal cane beang suite can eres dae ebiatyretanpede than duster egianeeantinty 52 0000 0009 Rev C w A Omni Page 2 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer Scope Firmware Revisions 20 74 and 24 74 of OMNI 6000 OMNI 3000 Flow Computers have the feature of Batch Recalculation This feature applies to Turbine Positive Displ
7. e in a valid value and press Enter Step 5 Scroll to Recalculate amp Print Press Y and then Enter At this time the flow computer will recalculate the batch data and send the report to the printer and the Historical Batch Report Buffer in RAM memory Batch report data can also be captured in Raw Data Archive RAM using the trigger Boolean 1n76 The default batch report shows the batch number as XXXXXXXX where the number ahead of the is the batch number 5n90 and the number after the is the number of times that the batch has been recalculated 3n52 Variable 3n52 is reset to 0 at the end of a batch and increments each time the batch is recalculated How the Flow Computer Manages the Modbus Database NOTE The second digit of the index number indicated as n with i e n 1 2 3 or 4 A pointer mechanism has been utilized which avoids having to have duplicate data points for every batch report variable for each of the four 4 previous batches Only 1 one set of data points for previous batch data are mapped within the Modbus database A pointer register is used to determine which set of previous batch data will be available by accessing the previous batch data points within the Modbus database defines which meter run you are working Using the batch gross totalizer variable as an example we have e Modbus address of Current Batch in Progress Gross Totalizer is 5n01 e Modbus addres
8. mni Page 5 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer Table 4 Station Registers Previous 4 Batches for Station are in 3879 3879 1 last batch 4 oldest SG60 Density Ref Temp 8908 API60 8919 BS amp W 8917 Recalculate amp Print edge Tiggered 1798 NOTE Station registers are available via Modbus Communications Applies to Version 20 24 74 32 Version 20 74 NOTE When recalculating a previous batch and adjusting the gravity of the product using Modbus transactions you must write both updated SG60 and equivalent API60 gravity values before sending the Recalculate and Print command API SG conversion equations as follows e API60 141 5 SG60 131 5 e SG60 141 5 API60 131 5 Modbus Communication Summary NOTE Setting these registers via Variable Statement is not allowed and will not produce the expected results The flow computer retains data for the last four 4 completed batches Only one 1 set of this data can be accessed ata time Pointer registers 3151 Meter Run 1 3251 Meter Run 2 3351 Meter Run 3 3451 Meter Run 4n and 3879 for Meter Station are used to determine what set of batch data will be accessed API60 SG60 and S amp W data can be adjusted and the batch recalculated by writing a 1 to points 2756 for Meter Run 1 2757 for Meter Run 2 2758 for Meter Run 3 2759 for Meter Run 4 and 1798 for Meter Station Meter n
9. s of Previous Batch Gross Totalizer is 5n50 e Modbus address of Pointer register to select which previous batch is mapped is 3n51 As the batch progresses the gross totalizer 5n01 accumulates flow At the end of the batch the flow computer performs the following actions e 3 previous batch data replaces 4 previous batch data e 2 previous batch data replaces 3 previous batch data e 1 previous batch data replaces 2 previous batch data e Current batch data replaces 1 previous batch data e Pointer register 3n51 is set to the value 1 so that the Modbus database addresses for previous batch will access data for the batch just ended This ensures that the batch report which prints immediately at the end of a batch and gets it s data from the Modbus database includes the correct information Table 1 using the batch gross totalizer as an example shows typical data that would be read by accessing Modbus points 5n01 and 5n50 The data read depends upon the value of pointer register 3n51 52 0000 0009 Rev C Omni Page 4 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer TABLE 1 Batch Gross Totalizer STEP DESCRIPTION CURRENT 1 PREV 2 PREV 3 PREV 4 PREV BATCH BATCH BATCH BATCH BATCH 5n01 5n50 5n50 5nBOo 5n50 Value contained in Pointer register 3n51 a 1 3 4 1 First batch running 12340 0 0 0 0 2
10. tor Csw is calculated using the sample analysis S amp W Net Standard Volume NSV is recalculated using the recalculated GSV and Csw factor Using the Flow Computer Keypad to Recalculate a Previous Batch Ticket CAUTION Ato ensure that previous batch data is correctly recalculated to not recalculate a batch close to ending a current batch in progress NOTE Only four 4 lines can be displayed at one time Use the scroll up or down arrows keys to display additional text Step 1 Press Prog Batch Meter n Enter n meter run number The OMNI LCD screen will display METER 1 BATCH Print amp Reset Select Prev Batch Enter API60 Enter SG60 0000 Enter S amp Ww 08 Recalculating amp Print Step 2 Select which previous batch you wish to recalculate The OMNI stores the last four 4 completed batches numbered as 1 last batch completed to 4 oldest batch completed Press to scroll down to Select Prev Batch and enter a number between one 1 and four 4 depending upon which batch is to be recalculated 52 0000 0009 Rev C Omni Page 3 of 8 TB 980202C Recalculating a Previous Batch within the Flow Computer The flow computer moves the selected previous batch data to the previous batch data points within the database see explanation later in this document Step 3 Enter Password when requested Step 4 Scroll to either Enter API60 or Enter SG60 Typ
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