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1. 1 Ease of Use The Teridian 71M6513 Power Metering chip and demonstration board is simple to use With the correct equipment and knowledge this demo board can be converted into a working multi use meter 2 Development Tool Qualit With the debugging board required to send commands and the download board required to load and change code this can be troublesome to use for developing a power energy meter The parts required to develop and build this power meter were not very flexible There was only one company Signum Systems which sold either the Flash Download Board or the ADM 51 ICE The Keil Compiler was the most complete set of software for this Microprocessor derivative and was the most recommended 3 Code Efficiency The code was efficient in the demo code applications When trying to change the code from what the demo program did to what was needed there were many problems in setting up the modes and counters When altering the contents of a function by perhaps adding a for loop or while loop the timing of the outputs was also altered There were few comments in the demo code to explain what might be happening in any of the functions so when there was strange behavior there was no way to tell what a function was supposed to do 4 Benefits to the Student Faculty and the Hosting Company This research project and the internship experience have greatly benefited the senior undergraduate student by exposing her to real world applic2. Bhool ce_totals_rdy void i CE a Common Bbool done U08d c S308 get_num void Convert ascii decimal or hex short to binary number 308 get_num decimal void f f Convert ascii decimal byte to binary number U08 get_char_d U08d dj Get next character from CLI buffer and allow unget void divide U08x u UO08x v U08 m U08 n void multiply 4 U08x w UO8x u UO8x v void multiply 8 4 U08x w UO8x u UO8x v uosr Help_M10 7 Calendar Date Uor Help _M1l1 Mll phase V I angle at phase degrees M12 angle V angle between phase degrees MR RMS Values mma O Morente mie B Files le 3 3 3 TET Build Command A FindinFiles 7 lls gt L 644 C 40 NUM RW Figure 2 The Keil Software Environment vezr L abed 2 Provided Demo Code The provided demo code performs some of the specified requirements The demo code executes commands in two ways both of which require the use of the debugging and demo board simultaneously First there is a push button on the debugging board labeled DISPLAY_SEL With the demo code loaded into the demo board providing that both the target and the debugging board are powered this button scrolls through the following values 1 Temperature in Delta 2 Frequency 3 W h Total Consumption in Watt Hr 4 W h Total Inverse Consumption in Watt Hr 5 VAR h Total Consumption in Volt Ampere Reactive Hr 6 VAR h Total In
3. flash download board from the Teridian Semiconductor Company 1 The Keil Software Environment The Keil Software Company has a whole range of development tools for the Intel 8051 processor family The kit that was used to develop codes for this project comes with a compiler linker and assembler The development environment is the uVision2 IDE or Integrated Development Environment version 2 40 for Windows This IDE combines project management source code editing and program debugging With the tools provided one can compile C code assemble files link and locate modules and libraries create HEX files and debug code This software can be used with almost any derivative of the 8051 Microprocessor including the embedded 8051 in the Teridian 71M6513 Figure 2 below gives and example of what the uVision2 IDE looks like during development 6513_demo pVision2 Eile Edit View Project Debug Flash Peripherals Tools SV CS Window Help asago halo c Eg 26 4 S Q z oar amp Li j A A Taget1 i Project Workspace x 5 j Documents and Settings Bobbie jocuments Senior _Demo display c Sy Target 1 ERA t d Settings BobbieWy D ts S 2 651016513_D Adisplay arge pn 0g Library e e External functions used within this module Q Source 3 r E A defaults c void background void 2 Ta lemigce void LCD_CE_0ff void void LCD_Hello void display c Home Bbool ce_outputs_rdy void a Pte t
4. the onboard display is a seven segment LCD display Therefore only numerical characters can be displayed with some reference to alpha characters i e P or E can be represented properly with the seven segments In future work on this project it is hoped that a character display will be added so that one can display Energy W h xxx xxx and so on 3 Digital I O Pins With the energy pulse input requirements it is necessary to have 4 digital inputs to bring pulses into the board The 71M6513 Power Metering chip has 22 digital I O pins which can be configured for either I O or LCD control Depending on the type of LCD used a different number of I O can be required to run it With the seven segment LCD display provided there were 15 I O pins being used by the display The first I O pin was labeled DIO21 then DIO20 and down to DIOO This meant that DIO21 through DIO7 were being used on this demo board for LCD control leaving only DIO6 through DIOO for digital inputs and outputs The only DIO that can be connected to the board for use are DIO21 through DIO16 However these were used by the LCD and so cannot be used for the digital inputs as desired There are ways to work g ezy abed around this problem with more time including multiplexing the inputs to these pins or speaking with a Teridian representative about other options for DIO V Conclusions and Discussions From the above research the following conclusions can be drawn
5. 2006 2307 DESIGNING BUILDING AND TESTING AN ADVANCED INDUSTRIAL GRADE THREE PHASE DIGITAL POWER METER Bobbie Meredith Middle Tennessee State University BOBBIE JO MEREDITH Mrs Meredith is currently a graduate student Computer Engineering Technology major in the Department of Engineering Technology and Industrial Studies at Middle Tennessee State University She earned her BS degree in Computer Engineering Technology with minor in Computer Science from MTSU in 2005 She is currently working as an Electronics Test Engineer for Schneider Electric Power Monitoring and Control Division Her interests include the design building programming and testing of microprocessor and microcontroller based systems Saleh Sbenaty Middle Tennessee State University SALEH M SBENATY Dr Sbenaty is currently a Professor of Engineering Technology at Middle Tennessee State University He received the BS degree in EE from Damascus University and the MS and Ph D degrees in EE from Tennessee Technological University He is actively engaged in curriculum development for technology education He has written and co authored several industry based case studies He is also conducting research in the area of mass spectrometry power electronics lasers and instrumentation Jason Thurmond Schneider Electric Power Monitoring and Control JASON THURMOND With more than a decade of engineering and management experience Jason Thurmond has developed a key sense of what it t
6. INE SEG 24 27 ate Teridian s Single Converter posni SEG 32 41 ae Technology with a 21bit 2nd x ASH Soia gt Purses X order delta sigma ADC 6 analog el ae ee P inputs digital temperature power gt RTC r m FAULT gt j v2 TIMERS compensation precision voltage Ec vs ME 22 kHz ICE eee a Zezry L abed reference and 32 bit computation engine supports a wide range of polyphase metering applications with very few low cost external components A 32 kHz crystal time base for the entire system and internal battery backup support for RAM and RTC further reduce system cost The Teridian 71M6513 is mounted on a TDK Semiconductor Corporation TSC 71M6513 71M6513H Demo Board that is used for evaluating the 71M6513 71M6513H device for 3 phase electronic power metering applications It incorporates a 71M6513 or 71M6513H integrated circuit peripheral circuitry such as a serial EEPROM emulator port and on board power supply as well as a companion Debugging Board that allows a connection to a PC through a RS232 port The demo board allows the evaluation of the 71M6513 or 71M6513H power meter controller chip for measurement accuracy and overall system use The demo board is pre loaded with codes containing a low level API library exerciser LAPIE 6513_demo hex in the FLASH memory of the 71M6513 71M6513H IC This embedded application is developed to exercise all low level API library calls to directly manage the pe
7. Ohms TTL Logic Voltage Regulator 18 39V Energy Pulse 4750 Ohms Figure 4 Energy Pulse Circuit In this circuit the 39 V Transient Voltage Suppressor or TVS chops the incoming voltage at 39 volts so that the circuit does not become overloaded The LM317 and resistors bring the current down to 2mA so that it can trigger the opto coupler without burning it When a high signal is read in on the left side of the opto coupler light is emitted and then received by the diode in the right side of the opto coupler The single line TTL signal is then received from the right side This opto coupler is necessary to prevent damage to the demo board in the event that another component is damaged or faulty IV Results The Teridian 71M6513 Power Metering chip along with the demonstration board worked very well for this research project However when it came to actually changing the coding of the board and adding external inputs the demo system was hard to change These can be highlighted by the following L amp 2v tt obed 1 Necessary Additions Most of the set backs and roadblocks in this project came in gathering the necessary tools and components to create original code The Keil Programming Kit was obtained from MTSU This provided the necessary software tool however the 71M6513 Power Metering chip must have either a download board or an emulator to accept new codes The data sheets for the 71M6513 Power Metering chip st
8. Rh 9 input Wh 10 Operating Hours 11 RTC 12 Calendar Values from 1 to 8 where values that could have associated phase values i e 1 for phase A Value 9 was designated for the energy pulse input so 9 0 would display the information for input 9 ezry L abed 1 and so on to input 4 The display used was only a seven segment LCD display and prevented the display of actual words and letters to describe the values For voltage values a display of V was used U on the seven segment display for current I was displayed and for Power and Energy P and E were displayed These indicator letters were placed before the whole number values on 1 through 8 The phases or total were shown after the whole number by either a t A B or C For the inputs 1 was displayed and the operating hours and time are designated by OPH and t 4 Energy Pulse Input A major objective in this project was creating an energy pulse input to be read calculated and displayed by the metering chip The energy pulse was to be brought in from a Square D power meter in the PM7 family This family of power meters sends out an 18 39 V energy pulse signal with programmable pulse weights The required rate of scan was to be 25 Hz In order to read this value from the 71M6513 the voltage and current of the pulse had to be stepped down to a TTL level This was accomplished using the circuit shown in Figure 4 ENERGY PULSE UNIT SCHEMATIC OPTO COUPLER 100
9. Square D Flash Download Board From TDK Tech Support Keil Compiler Kit from MTSU Future Expenses ADM51 ICE 500 00 200 00 900 00 50 00 30 00 1 680 00 500 00 200 00 3 000 00 3 700 00 1 200 00 OL EZY LL abed
10. akes to develop Power Quality Analyzers and Power Metering equipment Jason presently serves as Engineering Manager for Schneider Electric s Power Monitoring and Control organization He holds a Bachelors of Science in Computer Engineering from Middle Tennessee State University He has been involved in evaluation and implementation studies for several IEC Power Quality and Safety standards and has multiple patents related to Power Monitoring devices He is an official member of IEC TC85 American Society for Engineering Education 2006 Leap ebeg Designing Building and Testing an Advanced Industrial Grade Three Phase Digital Power Meter I Abstract The current paper describes the design construction and testing of an advanced digital three phase power meter for industrial applications The project is the result of a very close collaboration between the author a senior Computer Engineering Technology major her faculty advisor at Middle Tennessee State University MTSU and the design engineers at the Power Logic Group of Square D a Division of Schneider Electric in LaVergne Tennessee At the time of writing this paper the author was completing her Internship at Square D where she was gaining the hands on experience necessary for a successful employment after graduation and learning state of the art and real world applications The meter initial requirements include the measurements of AC voltages in the range from 0 to 55 Vrms and c
11. ate that the flash download board for the meter can only install updates to the code on the board or load code to an empty board The ADMS1 is an In Circuit Emulator or ICE which was designed to program and debug the 71M6513 Power Metering chip This emulator is much more expensive and time was spent trying to find an ADMS1 at a better price Nearly 3 weeks into researching the prices and necessity of this emulator Teridian Tech Support indicated that the Flash Download board at a more economical price could program the 71M6513 This download board does not provide any debugging capabilities but simply loads the code into the flash memory After receiving this Flash Download Board the demo code was altered and downloaded back to the board 2 Code Problems The demo code that was provided with the board was not very susceptible to small changes Most of the display functions and display mode setups had to be rewritten in order for the meter to function as desired It is desired that the meter display the values in a cycle continuously The way that the code is written there are two modes CLI and IDLE The code bounces back and forth between these two modes checking to see if one is active The code will not go into the display portion unless the meter receives the CLI command or the scroll command from the push button This inhibited me from getting the meter to display what I wanted it to Another problem that arose in the display was that
12. ations to what she studied in the classroom Working with various engineers at Square D and communicating with the technical support staff from TDK and Teridian have increased her knowledgebase communication skills and hands on experience The faculty advisor also benefited from this joint project by collaborating with Square D staff a leader company in power control and measurement Square D also benefited at the end by evaluating this new board for their use preparing students for the work place and finally by actually hiring the intern who worked on this project and who graduated last December and started a full time job there as an electronic test engineer V References 1 71M6511 71M6511H and 75M6513 75M6513H Power Meter IC Family Software User s Guide Teridian Semiconductor Corporation 25 October 2005 2 75M6513 75M6513H 3 Phase Energy Meter IC Data Sheet Teridian Semiconductor Corporation September 2005 75m65 13 75m6513H Demo Board User s Manual Teridian Semiconductor Corporation October 2005 4 Meters Teridian Semiconductor Corporation Updated 2005 http www tdksemiconductor com products product_category_detail cfm category_key 27 A 6 Szr tL ebed Appendix A Project Budget Project Budget Expenses TDK 71M6513 Demo Board with Debugging Board and Software Flash Download Board Keil Compiler Kit Presentation Materials Digital Input Parts Credits Demo Board From
13. ripherals flash programming and CPU management clock timing power savings etc Below are the main components of this project Figure 1 shows from right the demo board and the debugging board Figure 1 TDK Demo and Debugging Boards HI Methodology Work on this project began by reading and understanding the literature provided along with the TDK development board This included valuable information on the 71M6513 chip the demo board and on the software From reviewing the functionality of the board and its components it was found that the pre loaded demo code performed some of the specified requirements while code for the remaining requirements would have to be developed using the Keil Software Environment There were four major areas of work and study These included Ser t ebed Familiarization with the Keil Software Environment Familiarization with the original demo code 3 Obtaining a flash download board and altering the original demo code to fit the specific requirements 4 Energy Pulse Input specifications and requirements a With the debugging board a computer with a hyper terminal and the demo code pre loaded on the board one could look at a number of values including energy per phase and total RMS voltages and currents date and time and operating hours In order to alter this code and add the remaining functions it was necessary to obtain the Keil Compiler and uVision2 environment as well as a
14. splay update UOsr Help M1 Ml Temperature degrees delta UOsr Help M2 M2 Frequency degrees U08r Help M3 M3 phase Wh Total Consumption UOsr Help M4 M4 phase Wh Total Inverse Consumption U0sr Help MS M5 phase VARh Total Consumption Udsr Help M6 M6 phase VARh Total Inverse Consumption UOsr Help M7 M phase VAh Total UOsr Help _ M6 M8 Operating Hours Uor Help M9 M9 Real Time Clock UOsr Help M1O M10 Calendar Date Ur Help Mll J Mll phase V I angle at phase degrees gt Uor Help _Ml2 Ml2 angle angle between phase degrees Uds6r Help _M13 MR RMS Values Udsr Help Ml4 J MO Outputs Uosr Help M15 Ur Help Ml6 Phase Sum Ur Help M17 J Angle A B i se U0sr code MHelp Help M Help MO Help Ml Help M2 Help M3 Help M4 Help M5 Help M6 Help M7 Help M6 Help M9 Help_M10 Help Mll Help M12 Help_M13 Help M14 Help M15 Help M16 NULL Figure 3 Print Code 3 Code Changes While the demo code was used as a base for this meter project it did not satisfy all requirements The code was altered so that the values began at the whole number 1 with Volts RMS and ended with the Calendar date at whole number 12 The complete list is as follows 1 Phase VRMS 2 Phase IRMS 3 Phase W 4 Phase VAR 5 Phase VA 6 Phase Wh 7 Phase VARh 8 Phase VA
15. urrents in the range from 0 tol0 A per phase In addition the meter should be capable of measuring power real reactive and apparent and energy consumption per phase and total The meter should also have an output pulse at the TTL level with a set pulse weight The output is for the total kW hr and kVAR hr The meter also takes four pulse inputs from devices developed by Square D the result of converting 18 36 V to the TTL level and display the four inputs on the onboard display The above mentioned data should be displayed on a seven segment LCD display The design building and testing of the above specified power meter is presented The research also reports on the ease of use development tool quality code efficiency and other significant characteristics of the TDK development board Discussions of the results and the benefits of this collaborative project are also presented 71M6513 71M6513H Block Diagram II Introduction The research project is built around the Teridian 71M6513 Power Metering chip The project involved working with a POWER SUPPLY TDK Semiconductor Corporation V3 3A V3 20 GNDAGNOD TSC 71M6513 71M6513H Demo Board i 71M6513 REGULATOR vi E The Teridian 71M6513 is a v25 x p highly integrated System On a REFERENCE SENSOR pe lt VREF See Chip SOC with an MCU core valas RAM como NEE RTC FLASH and LCD driver AS COMPUTE ee Oe Ia K r Les ENG
16. verse Consumption in Volt Ampere Reactive Hr 7 VA h Total Consumption in Volt Ampere Hr 8 Operating Hours 9 Time 10 Date The second way that the debugging board executes commands from the demo code is through a Command Line Interface or CLI The commands are sent using a hyper terminal setup to communicate through the serial port of the CPU and the debugging board The demo code then executes these commands One of the commands in the demo code is to display different metered values depending on the designated value and phase selected The value types are selected by a whole number For example to view Total W h Consumption one would select M3 M is the display command At this point the screen displays the total W h Consumption until another command is issued To read different phases the user would enter the desired value and then a decimal and then the desired phase For example M3 0 would be for sum M3 1 would be for phase A M3 2 would be for phase B and M3 3 would be for phase C For example the display below shows the number and then the value in 6 digits with 3 of those at the right the decimal point The above indicates W h Consumption on Phase B is 28 053 W h Figure 3 is the section of code that prints the help menu in the hyper terminal It shows which whole numbers are aligned with the indicated value types Gezr 11 abed Meter Controls UOsr Help M M Meter Totals Display UOsr Help _MO M0 No di
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