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DPMS XPQ User Manual

Multi-function power meter
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DPMS XPQ Multi-Function Power Meter
User Manual 1087-332
POWER INSTRUMENTS

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  • Page 1 DPMS XPQ Multi-Function Power Meter User Manual 1087-332 POWER INSTRUMENTS...
  • Page 3 POWER INSTRUMENTS Copyright 2008© V1.0 This manual may not be reproduced in whole or in part by any means, without the expressed written consent of AMETEK. The information contained in this document is believed to be accurate at the time of publication, however, AMETEK assumes no responsibility for any errors which may appear here and reserves the right to make changes without notice.
  • Page 4 DPMS XPQ meter. The following symbols are used in this user’s manual and on the DPMS XPQ meter to alert the danger or to prompt in the operating or setting process. Danger symbol, Failure to observe the information may result in injury or death.

  • Page 5: Table Of Contents

    POWER INSTRUMENTS content Chapter 1 Introduction……………………………………………………………………………6 Purpose........………………………………………………………7 Application Area......………………………………………………………9 Function........………………………..……………………………9 Comparison........………………………………………….………10 Chapter 2 Installation……………………………………………………………………………12 Appearance and Dimensions……………………..……………………………………13 Installation Method…………………………………………………….……….….……14 Wiring.......………………………………………………...……………………17 Chapter 3 Meter Operation and Parameter Setting…………….…………………………36 Display Panel and Key………………………………….………………………………37 Metering Data Reading…………………………………...……………….……………39 Statistics Display……………………...…………………………………………………43 Meter Parameter Setting…………….………………….…..…………………………44 Energy Parameter Setting……………………………….………………………..……51 Voltage Eligibility Parameter Setting…………….……….……………………………53 Chapter 4 Function and Software…………………………….………………………..……56 Basic Analog Measurements……………………………..…………………….………57...
  • Page 6 DPMS XPQ User Manual Getting Started! Congratulations! You have received an advanced, versatile, multifunction power meter, also known as a Remote terminal unit (RTU), which will greatly benefit your power system. When you open the package, you will find the following items.

  • Page 7: Chapter 1 Introduction

    Chapter 1 Introduction Purpose Application Area Functions DPMS XPQ Series...

  • Page 8: Purpose

    Powerful Multifunction Power Meter The DPMS XPQ series multifunction power meter is the new generation of the very popular DPMS. It has more functions and higher accuracy. It not only integrates three-phase energy measuring and displaying, energy accumulating, harmonic measuring, malfunction alarm, statistics and records, digital input /...
  • Page 9 THD of voltage and current, harmonics up to the 31st order and an unbalance factor of voltage and current, etc. Main functions of the DPMS XPQ are listed in table 1.1. Metering Energy VLN, VLN average, VLL, VLL average.

  • Page 10: Application Area

    Accuracy of Power and Energy is 0.5%, four quadrants metering. Small Size and Easy Installation With the size of DIN96 ×96 and 55mm depth after mounting, the DPMS XPQ can be installed in a small cabin. The fixing clips are used for easy installation and removal. Easy to Use With a large high density LCD screen, the display of the DPMS XPQ is easy to read and use.

  • Page 11: Comparison

    “on” time is selectable. Multiple Wiring Modes The DPMS XPQ can easily be used in either: high voltage, low voltage, three phase three wires, three phase four wires or a single phase system. High safety, high stability, the DPMS XPQ was designed according to industrial standards.
  • Page 12 DPMS XPQ User Manual Harmonics Phases and all ● ● ● phase ● ● Voltage harmonic analysis ● ● current harmonic analysis ● ● Function Sequence ● ● ● phase angle ● ● ● Energy Real time ● ● ●...

  • Page 13: Chapter 2 Installation

    Chapter 2 Installation Appearance and Dimensions Installation Method Wiring...
  • Page 14 Appearance and Dimensions Fig 2.1 Appearance of the DPMS XPQ PART NAME DESCRIPTION The DPMS XPQ enclosures are made of high strength anti- 1. Enclosure combustible engineered plastic Casing After the installation, this part is before the panel. The color of 2.

  • Page 15: Installation Method

    Fig 2.2 Dimensions Installation Method Environmental Before installation, please check the environment temperature and humidity to ensure the DPMS XPQ meter is being placed where optimum performance will occur. Temperature Operation: -25 - 70 deg. Storage: -40 - 85 deg.

  • Page 16: Installation Steps

    DPMS XPQ User Manual The meter should be installed in a dry and dust free environment and avoid heat, radiation and high electrical noise sources. Maximum Altitude: 2,000m Site Requirement: Indoor Use Installation Steps Normally, meters are installed on the panel of switch gear.
  • Page 17 POWER INSTRUMENTS 3. Finally, install clips back on the meter from the backside and push the clip tightly so that the meter is affixed on the panel. panel Fig 2.5 Use the clips to affix the meter on the panel Space required for Installation The space around the meter should be large enough so that the meter removal, terminal strip wiring and wire arrangement could be done easily.

  • Page 18: Wiring

    There are three terminal strips on the back: Voltage & Current input, Auxiliary and Extend. Only the DPMS XPQ with the PRIO option has the Extend Terminal Strip. The 1, 2 and 3 are used to represent each phase of a three phase system.
  • Page 19 POWER INSTRUMENTS Extend Terminal Strip Fig 2.7 Terminal Strips Safety Earth Connection DANEROUS Before doing the meter wiring connection, please Only qualified personnel make sure that the switch gear has a safety Earth s h o u l d d o t h e w i r e connection work.
  • Page 20 DPMS XPQ User Manual Note 1A FUSE Make sure the power Power Supply supply voltage is the N Acuvim-X same as what the meter needs for its auxiliary power. Ground Fig 2.8 Wiring of Power Supply A fuse (typical 1A/250Vac) should be used in the auxiliary power supply loop.
  • Page 21 Three phase wiring diagram The DPMS XPQ can satisfy most kinds of three phase wiring diagrams. Please read this part carefully before you begin to do the wiring so that you may chose a wiring diagram suitable for your power system.
  • Page 22 2.10a. In the high voltage input system, 3PT Wye mode is often used as in fig 2.10b. The voltage input mode of the DPMS XPQ should be set to 3LN for both voltage input wiring modes.
  • Page 23 3-Phase 3-Line direct connection mode (3LN) In a 3-Phase 3-Line system, power line A, B and C are connected to V1, V2 and V3 directly. Vn is floated. The voltage input mode of the DPMS XPQ should be set to 3LN.
  • Page 24 2.12. It is supposed that the 3 phases of the power system are balanced. The voltage of V2 is calculated according to V1 and V3. The voltage input mode of the DPMS XPQ should be set to 2LN for 2PT voltage input wiring mode. Fig 2.12 2LN with 2PTs 3-Phase 3-Line open Delta Mode (2LL) Open delta wiring mode is often used in high voltage systems.
  • Page 25 All current input of a three phase system can be viewed as 3CT, whether there are 2 CTs or 3 CTs on the input side. The current input mode of the DPMS XPQ should be set to 3CT for this current input wiring mode.
  • Page 26 The difference in fig. 2.16 and fig. 2.15 is that there is not current input in the I21 and I22 terminals. The I2 value is calculated from formula i1+i2+i3=0. The current input mode of the DPMS XPQ should be set to 2CT for this current input wiring mode.
  • Page 27 Frequently used wiring method The voltage and current wiring method are put together in one drawing. The DPMS XPQ meter will display normally only if the setting of the meter is associated with the wiring of the voltage and current input.
  • Page 28 DPMS XPQ User Manual 2. 3LN, 3CT with 2 CTs Fig 2.19 3LN, 3CT with 2 CTs 3. 2LN, 2CT Fig 2.20 2LN, 2CT...
  • Page 29 POWER INSTRUMENTS 4. 2LN, 1CT Acuvim-X Fig 2.21 2LN, 1CT Fig 2.21 2LN, 1CT 5. 2LL, 3CT Fig 2.22 2LN, 3CT...
  • Page 30 DPMS XPQ User Manual 6. 2LL, 2CT Fig 2.23 2LL, 2CT 7. 2LL, 1CT Fig 2.24 2LL, 1CT...
  • Page 31 POWER INSTRUMENTS 8. Single Phase 2 Line (Wiring mode setting 3LN, 3CT) Fig 2.25 Single Phase 2 Lines 9. Single Phase 3 Line (Wiring mode setting 3LN, 3CT) Fig 2.26 Single Phase 3 Line...
  • Page 32 DPMS XPQ User Manual Wiring of Digital Inputs There are two digital inputs of wet contact in the standard DPMS XPQ. The terminals of the two digital inputs are DI1+, DI1- (15, 16) and DI2+, DI2- (17, 18). Additional two digital inputs are optional. The terminals of the two additional digital inputs are DI3+, DI3-(25, 26) and DI4+, DI4-(27, 28).
  • Page 33 Fig 2.28 Digital Input with Auxiliary Power Relay Output (RO) There are two additional relay output options for the DPMS XPQ. The terminals are R11, R12 (31, 32) and R21, R22 (33, 34). These two relay outputs are used for remote control electric switches in the power system.
  • Page 34 DPMS XPQ User Manual There are two mode selections for relay output, one is latching, and the other is momentary. For the latching mode, the relay can be used to output two states, on or off. For the momentary mode, the output of the relay changes from off to on for a period of time Ton and then goes off.
  • Page 35 (1.3mm Communication The communication port and protocol of the DPMS XPQ are RS485 and Modbus-RTU. The communication terminals are A, B, and S (11, 12, 13). A is differential signal +, B is differential signal - and S is connected to the shield of the twisted pair cable.
  • Page 36 DPMS XPQ User Manual overall length of the RS485 cable connecting all devices can not exceed 1200m (4000ft). The DPMS XPQ is used as a slave device of a master like a PC, PLC, data collector or RTU. If the master does not have an RS485 communication port, a converter has to be used.
  • Page 37 POWER INSTRUMENTS 232 /485 Converter Master Acuvim-X Acuvim-X Acuvim-X Acuvim-X Acuvim-X Acuvim-X fig 2.31 Circle Mode Fig 2.33 Circle mode 3. Star The connection for RS485 net is in Wye mode. An anti-signal reflecting resistor may be needed in each line. 232/485 Converter Master...
  • Page 38 DPMS XPQ User Manual Recommendations for high quality communication:   Good quality shielded twisted pair of AWG22 (0.6mm2) or larger is very important.   The shield of each segment of the RS485 cable must be connected to the ground at one end only.

  • Page 39: Chapter 3 Meter Operation And Parameter Setting

    Chapter 3 Meter Operation and Parameter Setting Display Panel and Keys Metering Data Reading Statistics Display Meter Parameter Setting Energy Parameter Setting Voltage Eligibility Parameter Setting...

  • Page 40: Display Panel And Key

    Detailed human-machine interface of the meter will be described in this chapter. It includes how to get the metering data and how to do the parameter setting. This chapter is based on the DPMS XPQ-G, but other patterns can be operated the same way.
  • Page 41 POWER INSTRUMENTS Table 3.1 Display Panel description SN Display Description Display metering data: Voltage, Current, Power, Power Four lines of letter in factor, Frequency, THD, Demand, Unbalance factor, metering area Max/Min Value etc. One line of letter in Energy data display or real time clock the energy display area Load rate Display load current to rating current percentage...

  • Page 42: Metering Data Reading

    DPMS XPQ User Manual There are four keys on the front panel, labeled as H, P, E and V/A from left to right. Use these four keys to read metering data and set the parameters. Metering Data Reading Normally, it displays the metering data, such as voltage, current, power etc.
  • Page 43 POWER INSTRUMENTS Press P, to display power related data. The screen will scroll to the next display as you press P each time. It will go back to the first screen if you press P at the last screen. Three phase power Three phase reactive power...
  • Page 44 DPMS XPQ User Manual Press H, to display power quality data, including THD, unbalance factor and voltage eligibility. The screen will scroll to the next display THD of phase or line power as you press H each time. It will go back to the first screen if you press H at the last screen.
  • Page 45 POWER INSTRUMENTS Consumption energy Meter running time Generation energy Time. Format: hh:mm:ss. Total energy Date.Format: mm:dd:yyyy Net energy Absorption reactive The absorption energy of normal time reactive energy Absorption reactive The generation energy of valley time reactive energy Absorption reactive Total reactive energy energy of peak time Absorption reactive...

  • Page 46: Statistics Display

    DPMS XPQ User Manual Statistics Display Press the P and V/A keys simultaneously, the Max and Min value of metering data will be displayed on the screen. The time stamp can be accessed through the communication port. P is used to change the display between MAX and MIN, V/A is used to scroll the screen.

  • Page 47: Meter Parameter Setting

    POWER INSTRUMENTS Meter Parameter Setting Note Under the metering data display mode, press the The secondary of the PT can not be shorted, H and V/A key simultaneously, to get into the meter otherwise it may cause parameter setting mode. Most of the settings can be severe damage to the instrument.
  • Page 48 DPMS XPQ User Manual 01: It is any digit from 1 - 247. Access code page 02: 1200, 2400, 4800, 9600, 19200, 38400bps are available. 01: Address setting 03: Voltage input could be one of three modes, 3LN, 2LN and 2LL. (Refer to chapter 2) 02: Baud rate setting 04: could be one of the three modes, 3CT, 2CT and 1CT.
  • Page 49 POWER INSTRUMENTS reactive energy and generation of reactive energy respectively. 10: The same as DO1 for setting, and they don’t affect 08: DO mode setting each other. 11: The DO pulse width is an integer from 1 - 50. One digit is 20ms.
  • Page 50 DPMS XPQ User Manual press any key if it is “off”. 18: 0 and 1 stands for current month and current day 15: Relay 2 mode respectively. 19: To clear the Max and Min value does not mean write 16: Relay 2 closing time 0 to all the registers, it will copy the metering value to the statistic registers and start a new statistic period.
  • Page 51 POWER INSTRUMENTS ON to OFF; “3” stands for trigger at any change. 27, 28, and 29: To adjust polarity of the current, the three 23: Clearance of peak demand currents direction can be set as “Negative” which means reversing 180 degrees and “Positive” which means 24: Clearance of peak normal.
  • Page 52 DPMS XPQ User Manual output to DO2. On the panel, it is set as decimal but in the register it is binary, so it needs conversion. 30: Alarming enable 36, 37: The same as DO1 and DO2. 38: Two alarm rules can be logically “and” by controlling the logic switch.
  • Page 53 POWER INSTRUMENTS 44: This is the last screen of the setting page. The access code can be changed on this page. It is important 38: Logical and to remember the new access code. between alarm rules 39: DI triggering waveform mode 40: Manual triggering waveform capture 41: Intervals of trending...

  • Page 54: Energy Parameter Setting

    DPMS XPQ User Manual Energy Parameter setting Pressing H and E simultaneously under the metering data display mode will enter the energy settings page. The key operation is the same as in other setting pages. You need to press H and E simultaneously to exit this mode.
  • Page 55 POWER INSTRUMENTS 07: This screen will display only when you select the “at 07: Freezing at once setting once”. 08: Set your time of freezing on this screen when you 08: Freezing time select the “assign” mode. setting 09: There are two modes of clearance: “assign” means 09: TOU clearance clear at an assigned time, this will skip the 10th screen mode selection...

  • Page 56: Voltage Eligibility Parameter Setting

    DPMS XPQ User Manual Voltage Eligibility Parameter Setting Pressing H and P simultaneously under the metering data display mode will enter the voltage eligibility statistics setting page. The operation of keys is the same as in other setting pages. You need to press H and P simultaneously to exit this mode.
  • Page 57 POWER INSTRUMENTS 03, 04: when the meter is set to “2LL”, it is U23 and 03: High limit of U2 for others. U2 (U23) 04: Low limit of 05, 06: when the meter is set to “2LL”, it is U31 and U2 (U23) U3 for others.
  • Page 58 DPMS XPQ User Manual 09: Voltage Eligibility 09, 10: Set the time for the “assign” mode. clearing date setting 11: It only freezes real time measurement. There are two modes. “Assign” means pointing a time to freeze, 10: Voltage Eligibility clearing time setting “at once”...

  • Page 59: Chapter 4 Function And Software

    Chapter 4 Function and Software Functionality and Utility Software...

  • Page 60: Basic Analog Measurements

    DPMS XPQ User Manual The DPMS XPQ can measure almost all the parameters in the power system. Some of its functions may not be demonstrated by simply pressing the keys, hence, the software to go with it. We’ll introduce functions with the help of the software interface in this chapter.
  • Page 61 POWER INSTRUMENTS Note1: It should be clear that there is a defined correspondence between the real value and communication value. For more detail, please refer to chapter Note 2: Settings related to measurements are in system settings. Harmonics It can measure and analyze THD, Harmonics (2nd to 31st), even HD, odd HD, Crest Factor, THFF, K factor etc.
  • Page 62 DPMS XPQ User Manual A chart in the software is shown below: Fig 4.3 Voltage Spectrum Phase angle Phase angle indicates the angle between U1 and other voltage and current parameters. It ranges from 0 - 360 degrees. This function is to help you find out the relationship between all input signals avoiding incorrect wiring.
  • Page 63 180 degrees and “Positive” which means normal. Sequence component and unbalance analysis The DPMS XPQ will do some sequential analysis for the input signal. it makes out the positive sequence, negative sequence and zero sequence of the fundamentals and will do the unbalance analysis of voltage and current.
  • Page 64 DPMS XPQ User Manual Fig 4.5 Sequence Component Max/Min The meter can record statistics of the maximum and minimum values of phase/line voltages, currents, power, reactive power, apparent power, power factor, frequency, demand, unbalance factor, THD as well as the time they occur.
  • Page 65 POWER INSTRUMENTS The following figure is an example: Fig 4.6 Max and Min Demand Types of demands calculated are: consumption power demand of phases A, B, and C, generation power demand of phases A, B, and C, absorption reactive power demand of phases A, B, and C, generation reactive power demand of phases A, B, and C, consumption power demand of three phase, generation power demand of three phase, absorption reactive power demand of three phase, generation reactive power demand of three phase, apparent...
  • Page 66 DPMS XPQ User Manual power demand, current demand of I1, current demand of I2, current demand of I3, current demand of average current, consumption power predictive demand, generation power predictive demand, absorption reactive power predictive demand, generation reactive power predictive demand, and apparent power predictive demand.
  • Page 67 POWER INSTRUMENTS calculation and the demands update at the end of each period. Synchronization demand When it is set as a fixed window, rolling window or thermal demand, the period can be synchronized via communication port or by changes of DI. DI Synchronization demand Changes to DI can trigger the synchronization of the demand period.
  • Page 68 DPMS XPQ User Manual Here is an example: Fig 4.7 Demand Here is to set demand:...
  • Page 69 POWER INSTRUMENTS Fig 4.8 Demand Setting Energy Various kinds of energy will be accumulated. The settings are explained in other chapters, so please refer to chapter 3 and chapter 5 carefully. Real time energy: the accumulation of energy for the kWh, kVARh and kVAh since cleared last time.
  • Page 70 DPMS XPQ User Manual Fig 4.9 Real-Time Energy You can point some different time block to go with different rates (sharp, peak, valley and normal). The meter will calculate the fee according to its inner clock and the settings. So it charges different fees for different rates.
  • Page 71 POWER INSTRUMENTS The following is an example: Fig 4.10 Current Month TOU Calculating mode 1. You can select calculating mode from a fundamental base or all-wave base by pressing a key or via communication. Fundamental based calculating is to accumulate energy ignoring harmonics while all-wave based calculating is to accumulate energy including fundamental and harmonics.
  • Page 72 DPMS XPQ User Manual Mode 1: The following figure shows how to set it: Fig 4.11 Energy Setting Freezing This is to backup the accumulated TOU, current TOU, and real time energy at some time point without affecting the existing data.
  • Page 73 POWER INSTRUMENTS Fig 4.12 Cumulative TOU TOU calendar: There are four schedules and each schedule has 8 time intervals. Each interval can charge one of the four rates: sharp, peak, valley and normal. Time format for each schedule is: enable | start time mm:dd:hh:mm:ss | end time mm:dd:hh:mm:ss Time format for each interval is: enable | start time hh:mm:ss | end time hh: mm:ss | rate kind...
  • Page 74 DPMS XPQ User Manual You can adjust the calendar to satisfy different uses. To ensure the validity of the calendar setting, the meter will check its rationality strictly. If there is no mistake in the calendar and the TOU function is enabled, TOU accumulation will begin.
  • Page 75 POWER INSTRUMENTS Fig 4.13 TOU Schedules Setting Pulse Energy Output The two digital outputs can be used as energy pulse output and cannot be used as the alarming outputs at the same time. The output energy can be selected among all kinds of energy and reactive energy. Pulse constant and pulse width can be set to meet your requirements.
  • Page 76 DPMS XPQ User Manual Pulse width ranges from 1 - 50 (integer) with a unit of 20ms. The narrowest interval between two pulses is 20ms. In practice the pulse width and the pulse ratio are selected according to system power. The relation of the two parameters should be satisfied by the following expression, In the expression, the Pmax is the maximum power or reactive power.

  • Page 77: Event Alarming

    POWER INSTRUMENTS Event alarming When the metering data is over the pre-setting limit and over pre-setting time interval, the over limit alarming will be picked up. The over limit value and time will be recorded and the maximum number of records is 16. The digital output (DO) and RO1, RO2 can be used as a trigger to light or sound alarming.
  • Page 78 DPMS XPQ User Manual “Delay time” indicates the time period that the event keeps happening after the setting equation or in equation is satisfied, which is used to confirm the event. Its value ranges from 0 - 6000 (integer) with a unit of 10ms. There is no delay when it is set to be 0, so the event triggers alarming at once.
  • Page 79 POWER INSTRUMENTS 2. Global settings The addresses of all global variables are 101dH~1024H and 103dH in system parameters discussed in chapter 5. “Alarming enable” determines whether the alarming function of this meter works. Only when it is set as “1”, the alarming function enables.
  • Page 80 DPMS XPQ User Manual “Alarming output to RO2” decides which alarm will be output to RO2. It is set the same as RO1. “Alarming output to DO1 setting”: When “Digital output mode” is set to “1”, DO1 can be used as an alarming output. Which alarm will be output to RO2 is set here.
  • Page 81 POWER INSTRUMENTS no output. The CT primary value of I1 is 200A. The primary voltage of U1 is 10000V, PT2 is 100V. Then let’s look how all the related registers are set. The first record: According to the table, the serial number of I1 is 9 ((14d8H)= 9); Conditions in equation 1 determine the high limit.
  • Page 82 DPMS XPQ User Manual Fig 4.15 Alarm Setting Event alarming setting There are 16 of records to be stored. But they are not corresponding to setting records, they record in cycle. The latest event will cover the oldest one. It begins from the 1st record when the power is turned on. When over range parameters resume to normal, the time and value will be recorded as an event as well.
  • Page 83 POWER INSTRUMENTS address parameter range 1540H First group: alarming status 0~65536 1541H First group: parameter number 0~246 1542H First group: over range or reset value Related with parameters 1543H~1549H First group: occur time: yyyy mm:dd:hh: time mm:ss:ms Table 4-3 alarming status of the 1st record “alarming status”...
  • Page 84 DPMS XPQ User Manual Fig 4.16 Alarm Log SOE Function There are 4 DI inputs, it can record changing information of DIs. The time resolution is 1ms. It can also determine whether to enable waveform capture and which kind of triggering by setting “DI triggering waveform capture mode” in system parameters.
  • Page 85 POWER INSTRUMENTS on and it works in a cycle. The data won’t lose during power off SOE will set bit0 of “system status” to be 1. At the same time, corresponding flags will be set to 1 to indicate new data. The meter sets flag of SOE but does not clear it. It should be cleared after controller has read the data, then bit0 of system parameters will be set to 0.
  • Page 86 DPMS XPQ User Manual Waveform record The DPMS XPQ can record 5 cycles of waveforms both before and after the trigger point of the entire 6 input channels (U1, U2, U3, I1, I2 and I3). There are 16 points for each cycle and a maximum of 5 waveform records.
  • Page 87 Here is an example: Fig 4.18 Waveform Log Trending records The DPMS XPQ-G takes records of frequency, UA (or UAB), IA, UB (or UBC), IB, UC(or UCA), IC at a fixed interval. So the controller can draw trending charts easily.
  • Page 88 DPMS XPQ User Manual not be changed. “Trending record backup pointer” is used by the controller, it stores the serial number that the controller will read, it can not be changed by the meter either. It is used to compare “trending record pointer” with input data from the controller, when the two are equal, bit4 of “system status”...
  • Page 89 POWER INSTRUMENTS Voltage Eligibility The DPMS XPQ-G can take the statistics of voltage eligibility, then give out a great amount of data. Eligibility = (1-overlimit time/Measuring time)*100% The upper and lower limits of voltage can be set according to the user.
  • Page 90 DPMS XPQ User Manual Fig 4.20 Voltage Eligibility Ratio...

  • Page 91: Chapter 5 Communication

    Chapter 5 Communication Introducing Modbus Protocol Format of Communication Data Address Table Application Details...
  • Page 92 Introducing Modbus Protocol The Modbus RTU protocol is used for communication in the DPMS XPQ. The data format and error check methods are defined in the Modbus protocol. The half duplex query and respond mode is adopted in the Modbus protocol.
  • Page 93 POWER INSTRUMENTS Framing Address Function Data Check 8-Bits 8-Bits N×8-Bits 16-Bits Table5.1 Data Frame Format Address Field The address field of a message frame contains eight bits. Valid slave device addresses are 0~247 decimal. A master addresses a slave by placing the slave address in the address field of the message.
  • Page 94 DPMS XPQ User Manual register addresses, the quantity of items to be handled, and the count of actual data bytes in the field. For example, if the master requests a slave to read a group of holding registers (function code 03), the data field specifies the starting register and how many registers are to be read.
  • Page 95 POWER INSTRUMENTS the CRC. Start and stop bits, and the parity bit, do not apply to the CRC. During generation of the CRC, each 8-bit character is exclusive ORed with the register contents. Then the result is shifted in the direction of the least significant bit (LSB), with a zero filled into the most significant bit (MSB) position.
  • Page 96 Table 5.4 Read the status of Relay1 and Relay2 Query Message Response The DPMS XPQ response includes the meter's address, function code, quantity of data byte, the data, and error checking. An example response to read the status of Relay1 and Relay2 is shown in Table 4.5. The status of Relay1 and Relay2 is responding to the last 2 bits of the data.
  • Page 97 2. Read the Status of DI (Function Code 02) 1=On, 0=Off. There are 4 DIs. The Address of each DI is DI1=0000H, DI2=0001H, DI3=0002H and DI4=0003H. The following query is to read the 4 DI Status of Number 17 DPMS XPQ. Query Addr DI start...
  • Page 98 DPMS XPQ User Manual 3. Read Data (Function Code 03) Query This function allows the master to obtain the measurement results of the meter.Table 5.8 is an example to read the 3 measured data (F, V1 and V2) from slave device number 17, the data address of F is 0130H, V1 is 0131H and V2 is 0132H.
  • Page 99 POWER INSTRUMENTS The example below is a request to meter number 17 to turn on Relay1. Addr DO addr DO addr Value Value CRC 16 CRC 16 Table5.10 Control Relay Query Message Response The normal response to the command request is to retransmit the message as received after the relay status has been altered.

  • Page 100: Data Address Table And Application Details

    DPMS XPQ User Manual Response The normal response to a preset Multi-Register request includes the meter's address, function code, data start register, the number of registers, and error checking. Addr fun Data start Data start Data Data addr hi addr lo...
  • Page 101 POWER INSTRUMENTS parameters relationship unit Format code System parameters Numerical value equals to No unit communication value Run time T=Rx/100 Hour Clock Numerical value equals to Unit of time communication value Energy Ep=Rx/10 Reactive energy Eq=Rx/10 kVARh Apparent energy Es=Rx/10 Voltage U=Rx X (PT1 / PT2) /10 Current demand...
  • Page 102 DPMS XPQ User Manual System Parameter Setting System parameters determine how the meter works. You should understand it clearly by referring to chapters 3 and 4. Function code: 03H for Reading, 10H for Presetting, data type: word. Format code: F1.
  • Page 103 POWER INSTRUMENTS 1011H Relay2 Pulse Width 50~3000 1012H LCD Back light Time 0~120 1013H Demand Slid Window Time 1~60 1014H Max/Min Clean Only 0ah works 1015H Max/min statistics time 0:month,1:day 1016H Clear demand memory Only 1 works 1017H Clear demand peak Only 1 works 1018H Demand calculating mode...
  • Page 104 DPMS XPQ User Manual 1028H TOU enable Only1 works 1029H TOU default enable Only 1 works 102AH Real time energy clearance Only 1 works 102BH TOU m o nt hly accounting 1: assigned time 0: end mode of month 102CH...
  • Page 105 POWER INSTRUMENTS 103FH Apparent power measuring mode 1040H DI triggering demand synchronization enable 1041H DI triggering condition To know more about these parameters, please refer to chapters 3 and 4. System Status Parameter “System status” indicates what events happened in the meter, what kinds of flags are read by the user and to be the index of the storage of the events.
  • Page 106 DPMS XPQ User Manual Read-only Record Pointer and its Status “Pointer” is the index number of the addresses of coming-up records.” 0”stands for the first group of records,”1” stands for the second group of records and so on. The data type is “word”.
  • Page 107 POWER INSTRUMENTS Date and Time Table Function code: 03 for Reading, 16 for Presetting. Address Parameter Range Format code 1080H Year 2000~2099 1081H Month 1~12 1082H 1~31 1083H Hour 0~23 1084H minute 0~59 1085H second 0~59 Energy Measurement All the addresses of energy registers are here. There are lots of registers including calendar setting, real time energy, energy freezing, current month TOU and last month TOU registers.
  • Page 108 DPMS XPQ User Manual 1087H~108BH Start time of first schedule: Time mm:dd:hh:mm:ss 108CH~1090H End time of first schedule: Time mm:dd:hh:mm:ss 1091H First interval enable or not 1:enable; 0:disable 1092H~1094H Start time of first interval: hh:mm:ss 0~23 1095H~1097H End time of first interval: hh:mm:ss 0~23...
  • Page 109 POWER INSTRUMENTS 11B4H~11C3H In series, they are generation energy, 0~99999999.9 inductive energy, capacitive energy, absolute sum of imp and exp energy, algebraic sum of imp and exp energy, absolute sum of the reactive energy, algebraic sum of reactive energy, Apparent energy. Energy Freezing Energy freezing is to copy real time energy, current month TOU energy, andaccumulating TOU energy without affecting any existing data and record the...
  • Page 110 DPMS XPQ User Manual energy(valley), Phase B inductive energy(valley), Phase B consumption energy(normal), Phase B generation energy(normal), Phase B inductive energy(normal), Phase C consumption energy(sharp), Phase C generation energy(sharp), Phase C inductive energy(sharp), Phase C capacitive energy(sharp), Phase C consumption energy(peak), Phase...
  • Page 111 POWER INSTRUMENTS TOU of Current Month TOU of current month is stored here. It refreshes every second and clears at the balance time. Function code: 03H for Reading, 10H for writing. Address Parameter Range Format code 142AH~14BBH the same as the accumulating TOU table in series Three phase consumption energy (all), three phase generation (all), three phase absorption reactive (all), three phase generation reactive (all) and three phase consumption, three phase generation, three phase absorption reactive...
  • Page 112 DPMS XPQ User Manual Alarming Records There are 16 groups of records with the same format. Function code: 03H for Reading, 10H for writing. Please refer to chapter 4 for more details. Address Parameter Range Format code 1540H First group: alarming status...
  • Page 113 POWER INSTRUMENTS Function code: 03H for Reading, 10H for writing. Please refer to chapter 4 for more details. Address Parameter Range Data type 1680H~1686H First group: occur time: time Word yyyy:mm:dd:hh:mm:ss:ms 1687H First group: trigger condition 0~255 Word 1688H First group: alarming trigger 0~65535 Word 1689H...
  • Page 114 DPMS XPQ User Manual Voltage Eligibility Function code: 03H for Reading, 10H for writing, data type: word. Address Parameter Range Format code 32A8H High limit of U1(U12) 0~65535 32A9H Low limit of U1(U12) 0~65535 32AAH High limit of U2(U23) 0~65535...
  • Page 115 POWER INSTRUMENTS 32D6H,32D7H Day: eligible time of three 0.0~3.402823E +38 phase 32D8H~32E1H month: same as day 0.0~3.402823E +38 32E2H~32EBH Year: same as day 0.0~3.402823E +38 32ECH~32F5H Accumulation: same as day 0.0~3.402823E +38 The following are statistics of Voltage Eligibility 32F6H,32F7H Day: eligibility of UA(UAB) 0~1000000000 32F8H,32F9H...
  • Page 116 DPMS XPQ User Manual 3372H~337BH Year: same as day 0.0~3.402823E +38 The following are statistics of Voltage Eligibility 337CH,337DH Day: eligibility of UA(UAB) 0~1000000000 337EH,337FH Day: eligibility of UB(UBC) 0~1000000000 3380H,3381H Day: eligibility of UC(UCA) 0~1000000000 3382H,3383H Day: eligibility of three phase...
  • Page 117 POWER INSTRUMENTS Address Parameter Relationship Unit 4000H,4001H Frequency F=Rx / 100 4002H,4003H Phase voltage V1 U=Rx X (PT1 / PT2) 4004H,4005H Phase voltage V2 U=Rx X (PT1 / PT2) 4006H,4007H Phase voltage V3 U=Rx X (PT1 / PT2) 4008H,4009H Average voltage Vvavg U=Rx X (PT1 / PT2) 400aH,400bH Line voltage...
  • Page 118 DPMS XPQ User Manual 402cH,402dH Phase A Apparent power S=Rx X (PT1 / PT2) X (CT1/5) 402eH,402fH Phase B Apparent power S=Rx X (PT1 / PT2) X (CT1/5) 4030H,4031H Phase C Apparent power S=Rx X (PT1 / PT2) X (CT1/5)
  • Page 119 POWER INSTRUMENTS 4043H THD_V1 of V2(V23) 0~10000 4044H THD_V1 of V3(V31) 0~10000 4045H THD_V 0~10000 4046H THD_I1 0~10000 4047H THD_I2 0~10000 4048H THD_I3 0~10000 4049H THD_I 0~10000 Voltage Harmonics, evenHD, oddHD, Crest Factor, TIF, K factor are shown as below 404aH~4067H Harmonics of V1(V12) (the 2nd to 31st) 0~10000...
  • Page 120 DPMS XPQ User Manual 4124H Last positive power demand of phase 0~32767 4125H Current positive power demand of 0~32767 phase A 4126H Peak positive power demand of 0~32767 phase A 4127H~412cH Occur time of Peak positive power time demand: yyyy:mm:dd:hh:mm:ss...
  • Page 121 POWER INSTRUMENTS 41a2H~41aaH Inductive power demand of three phase(like positive power demand of A phase ) 41abH~41b3H capacitive power demand of three phase(like positive power demand of A phase ) 41b4H~41bcH Apparent power demand of three phase(like positive power demand of A phase ) 41bdH~41c5H I1 demand(like positive power demand of A phase ) 41c6H~41ceH...
  • Page 122 DPMS XPQ User Manual MAX/MIN record MAX/MIN and related time. Function code: 03H for Reading. Address Parameter Range Format code 41e6H MAX of V1 0~65535 41e7H~41ecH Occur time: yyyy:mm:dd:hh:mm:ss time 41edH MAX of V2 0~65535 41efH~41f3H Occur time: yyyy:mm:dd:hh:mm:ss time...
  • Page 123 POWER INSTRUMENTS 4241H MAX of frequency 0~7000 4242H~4247H Occur time: yyyy:mm:dd:hh:mm:ss time 4248H MAX of power demand -32768~32767 4249H~424eH Occur time: yyyy:mm:dd:hh:mm:ss time 424fH MAX of reactive power demand -32768~32767 4250H~4255H Occur time: yyyy:mm:dd:hh:mm:ss time 4256H MAX of apparent power demand 0~65535 4257H~425cH Occur time: yyyy:mm:dd:hh:mm:ss...
  • Page 124 DPMS XPQ User Manual Sequence Component U1 (U12), I1 consist of real and complex parts. They have positive sequence, negative sequence and zero sequence. Data type is “int”. Function code: 03H for Reading. Address Parameter Range Format code 44a8H positive sequence real part of UA...
  • Page 125 POWER INSTRUMENTS 44b8H phase angle of I3 to V1 0~3600 44b9H phase angle of V23 to V12 0~3600 44baH phase angle of I1 to V12 0~3600 44bbH phase angle of I2 to V12 0~3600 44bcH phase angle of I3 to V12 0~3600 DI Status: Current DI Status, Function code: 02H for Reading.
  • Page 126 DPMS XPQ User Manual...

  • Page 127: Appendix

    Appendix Appendix A Technical Data and Specifications Appendix B Ordering Information...
  • Page 128 DPMS XPQ User Manual Appendix A Technical data and specifications Input Ratings Voltage Input Voltage rating 40~230VAC LN, 60~400VAC L-L with 20% over range Category III, Pollution degree 2 Frequency range 45~65Hz Overload 2 times for continue, 2500Vac for 1 Sec (None recurrence)
  • Page 129 POWER INSTRUMENTS Accuracy Parameter Accuracy Voltage 0.2% Current 0.2% Power 0.5% Reactive Power 0.5% Apparent Power 0.5% Power Factor 0.5% Frequency 0.2% Energy 0.5% Reactive Energy 0.5% 1.0% Unbalance Factor 0.5% Drift with Temperature Less than 100ppm/ Stability 0.5‰/year Note: 1. Accuracy of directly measured voltage: 0.2%, Accuracy of indirectly measured (Calculated) voltage: 0.5% 2.
  • Page 130 DPMS XPQ User Manual Digital Input (DI) Optical Isolation Isolate voltage 2500Vac rms Input Type Wet contact (Contact with power supply) Input resistance 2K ohm (typical) Input voltage range 5~30Vdc Close voltage > 10Vdc Max input current 20mA DI Aux Power...
  • Page 131 POWER INSTRUMENTS Suitable Conditions Dimensions (mm) 96x96x72 (Cut -out90x90) Protection Level IP52 (Front) IP20 ( Cover) Weight (g) Temperature -25 ~70 , Metering -10 ~70 , Display -40 ~85 , Storage Humidity 0~95% Non-condensing Power Supply 100-240Vac (±10%,50~60Hz) 100-300Vdc (±10%) Power Consumption Communication Port Type...
  • Page 132 DPMS XPQ User Manual Appendix B ORDERING INFORMATION DPMS XPQ D-------DPMS XPQ-D E-------DPMS XPQ-E F-------DPMS XPQ-F G------DPMS XPQ-G D: Base unit with metering measurement package and 4 digital inputs, 2 solid-state digital outputs, 2 relay outputs, RS-485 Comm port w/Modbus.
  • Page 134 Experience the Power AMETEK Power Instruments 255 North Union Street, Rochester NY, 14605 U.S.A. 585-263-7700 Tel. 585-454-7805 Fax POWER INSTRUMENTS power.sales@ametek.com www.ametekpower.com...

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