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AccuEnergy AcuDC 241 User Manual

Manual is about: Power and Energy Meter

Summary of AcuDC 241

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    Acudc 240 series power meter user's manual.

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    I copyright© 2012 v1.01 accuenergy tech. Ltd. This manual may not be altered or reproduced in whole or in part by any means without the expressed written consent of accuenergy. Accuenergy reserves all rights. [ document #1504e2101 revision date: jul., 2012 ].

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    Ii the information contained in this document is believed to be accurate at the time of pub- lication, however, accuenergy assumes no responsibility for any errors which may appear here and reserves the right to make changes without notice. Please ask the local repre- sentative for latest product sp...

  • Page 5: Contents

    Iii chapter 1 introduction .............................................................................................................1 1.1 meter overview ....................................................................................................................2 1.2 areas of application....

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    Iv.

  • Page 7: Welcome to Acudc 240 !

    V welcome to acudc 240 ! You have purchased an advanced, versatile, multifunction power meter. This meter can work as a remote terminal unit (rtu) that contributes to your system's stability and reliabil- ity. When you open the package, you will find the following items: 1. Acudc 240 meter x1 2. Ter...

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    Vi.

  • Page 9: Chapter 1 Introduction

    1 chapter 1 introduction 1.1 meter overview 1.2 area of application 1.3 acudc 240 series.

  • Page 10: 1.1 Meter Overview

    2 1.1 meter overview powerful yet cost-effective acudc 240 series monitors dc voltage, current, power and energy. It supports bi-direc- tional current measurement, and also displays meter running hour and load running hour. Analog output applies to dcs systems, industrial monitoring and control. Acu...

  • Page 11: 1.2 Area of Application

    3 1.2 area of application dc energy management systems solar and wind energy systems industrial dc control systems dc excitation systems metallurgy,galvanoplastics and electroanalysis industries 1.3 acudc 240 series acudc 240 series has three products: acudc 241, acudc 242, acudc 243. Acudc 241 is a...

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    4.

  • Page 13: Chapter 2 Installation

    5 chapter 2 installation 2.1 appearance and dimensions 2.2 installation methods 2.3 wiring.

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    6 the installation method is introduced in this chapter. Please read this chapter carefully be- fore beginning installation. 2.1 appearance and dimensions 2.1.1 appearance part description casing high intensity fire resistant engineering plastics front casing visible portion after mounting onto a pa...

  • Page 15: 2.2 Installation Methods

    7 2.1.2 dimensions(mm) 2.2 installation methods environmental before installation, please check the environment, temperature and humidity to ensure the acudc 240 series meter is being placed where it will not be damaged. 1. Termperature acudc 240 operation temperture is -20°c~70°c, which will meet g...

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    8 3. Location acudc 240 series meter should be installed in a dry and dust free environment. Avoid ex- posing meter to excessive heat, radiation and high electrical noise sources. Installation steps: acudc 240 series power meter is generally installed into the switchboard panel. 1. Cut a square hole...

  • Page 17: 2.3 Wiring

    9 3. Install clips on the back side of the meter and secure tightly to ensure the meter is af- fixed to the panel. See figure 2-5. 2.3 wiring terminal strips there are 3 groups of current terminal strips. There will be another terminal strip if the me- ter is connected with the i/o module. Voltage, ...

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    10 figure 2-6 acudc 240 terminal strip safety earth connection before setting up the meter's wiring, please make sure that the switchgear has an earth ground terminal. Connect both the meter's and the switchgear's ground terminal together. The fol- lowing ground terminal symbol is used in this user'...

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    11 power supply acudc 240 series meter power supply is 100-240vac(50/60hz) or 100-300vdc,which is universally supported. Please contact us for other voltage options. The meter's typical power consumption is very low and can be supplied by an independent source or by the measured load line. A regulat...

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    12 figure 2-9 power supply wiring with emc filter the wire size for the power supply is awg16~22 or 0.6~1.5mm 2 . Voltage input acudc240 has two voltage input options: direct input and via hall sensor. The wire size for the voltage input is awg16-22 or 0.6-1.5mm 2 . Please see the wiring diagrams fo...

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    13 figure 2-11 current input current wiring using current hall effect sensor + load acudc 240 current hall effect sensor vdc+ vdc- 6 5 i i output external dc power current input current wiring three ways: direct input, via shunt, via hall effect sensor + _.

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    14 voltage & current wiring using current hall effect sensor 1 load acudc 240 current hall effect sensor vdc+ vdc- 6 3 5 v- v+ i - i+ output external dc power voltage & current wiring using hall effect sensors 1 3 acudc 240 cur ren t hall eff ec t s ensor voltage hall effect sensor load vdc+ vdc- 5 ...

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    15 note:the load's negative must be connected to meter's current input terminal.Cur- rent output terminal should be connected to the system's negative. The load is serially connected to the meter or the shunt. The current input wire size is awg15-16 or 1.5-2.5mm 2 or equivalent resistance wire. Comm...

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    16 circuit (the last meter of the chain) if the communication quality is distorted. If a rs485 converter is used, it should support optical isolation and surge protection. Digital input acudc 240 optional i/o module is equipped with two dry contact digital inputs. The termi- nals are di11(17), di12(...

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    17 output, please specify when ordering. Analog output can be used for scaling current, voltage, power. The output type is fixed (0-20ma/4-20ma or 0-5v/1-5v), the output range can be configured. Acudc 240 series can be configured via pressing the buttons on the meter. The meter with communication op...

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    18 1:voltage type 2:current type note: for current and power 0 - ±100% limit setup, use absolute value for calculation: for current and power 0 - 100% limit setup, use reversed polarity of measured value for cal- culation: 4. Ao parameter code is listed in the following table. Code parameter 0 volta...

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    19 2 power table 2-3 ao parameter code the following are a few examples: (1)ao is voltage type: set ao parameter as voltage, upper limit is 100%, lower limit is 0%, full range value is 600v. When the measured value is 300v, ao is (2)ao is voltage type: set ao parameter as current, upper limit is 100...

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    20 (4)ao is current type: set ao parameter as power, upper limit is ±100%, lower limit is 0%, full range value is 12kw. When the measured value is -6kw, ao is: note: 1. For -100% - +100% setup, the upper limit value must be larger than the lower limit value. For all other setup, the absolute value o...

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    21 the wire size for the relay output circuit loop is awg22~16or0.5~1.3mm 2 . The relay outputs have three options. One is latch mode: the output is "on" and "off" state; the other is momentary mode, the output changes from "off" to "on", holding it for a time period "ton" and then go back to "off" ...

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    22 3. Set the threshold value. 4. Set the delay time(the minimum unit is second, the range is 0-255s) example: alarm condition is set for current larger than 10a. In a delay time of 15s, send alarm signal via ro1. Steps: 1. Set ro1 as alarm mode (set ro1 mode as 2). 2. Select alarm parameter as curr...

  • Page 31: 3.1 Display Panel and Keys

    23 chapter 3 meter display and operation 3.1 display panel and keys 3.2 metering data 3.3 system parameter settings 3.4 i/o parameter settings 3.5 meter information display.

  • Page 32: 3.1 Display Panel and Keys

    24 operational details of the meter will be described in this chapter. This includes viewing real-time metering data and setting parameters using diff erent key combinations. 3.1 display panel and keys the front of the acudc 240 series meter consists of an lcd screen and two control keys. All displa...

  • Page 33: 3.2 Metering Data

    25 n umber d isplay description 1 displays data of voltage, current, power, energy. 2 kv,ka,kw,mw,hz,kvar, mvar,kva,mva,kwh ,kvarh,kvah data unit. 3 communication no icon: no communication; one icon: query sent two icons: query sent and response received 4 settings mode indicates the meter is in set...

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    26 voltage meter display for acudc 241, it only displays voltage. U=220.2v. Current meter display for acudc 242, it only displays current. I=49.99a. For acudc 243, the screen displays voltage, current and power. The first line displays voltage, the second line diplays current, the third line display...

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    27 1 st screen:import energy. E_imp=68.32kwh. Press "v/a" to scroll to the 2 nd screen. 2 nd screen:export energy. E_exp=25.58kwh. Press "v/a" to scroll to the 3 rd screen. 3 rd screen:total energy. E_total=93.90kwh. Press "v/a" to scroll to the 4 th screen. 4 th screen: net energy. E_net=47.74kwh. ...

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    28 3.3 system parameter settings pressing “f” and “v/a” simultaneously will activate the parameter setting mode. In parameter setting mode, “f” key is used to increase value by one for the flashing digit. "v/a" key is used to confirm the flashing digit and move the cursor. At the last digit of the p...

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    29 1 st screen: communication address setup. It is used to set communication address, which can be any integer 1-247. The left figure shows the address is 1. To change: press "f" to add one to the flashing digit. Press "v/a" to confirm and move the flashing digit. At the last digit, press "v/a" to s...

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    30 4 th screen: full range current setting. Range: 20-50000, unit is a. Press “f” and “v/a”to edit the vaule. Press “v/a”at the last digit to go to the next screen. Note: only indirect current wiring has this screen. 5 th screen: full range shunt setting. Range: 50-100, unit is mv. Press “f” and “v/...

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    31 8 th screen: voltage hall effect sensor setting. Two modes:0:0 - ±5v;1:0 - ±4v. Press "f" key to select. Press “v/a” to go to the next screen. Note: only the voltage wiring via voltage hall effect sensor has the above two screens. 9 th screen: clear energy. Display "yes" or "no". "yes" means clea...

  • Page 40: 3.4 I/o Parameter Settings

    32 by now the parameter settings are completed. Pressing “f” and “v/a” simultaneously will exit system parameter settings mode and return to the metering data mode. 3.4 i/o parameter settings for meters with i/o module, under system parameter settings mode, hold “f” key for 3 sec- onds to enter i/o ...

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    33 1 st screen: ao1 parameter setting. Three options: 0 , volage; 1, current ; 2 , power. Press "f" key to select. Press “v/a” to go to the next screen. The figure shows ao1 is set as current. Note: 241 and 242 meter do not have this screen. Ao1 is set as what is being measured. 2 nd screen:ao1 lowe...

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    34 4 th screen: ao2 parameter setting.Three options: 0 , volage ; 1 , current ; 2 , power . Press "f" key to select. Press “v/a” to confirm and go to the next screen. The figure shows ao2 is set as voltage. Note: 241 and 242 meter do not have this screen. Ao2 is set as what is being measured. 5 th s...

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    35 1 st screen: ro1 mode. Three modes : 0 , latch ; 1 , momentary ; 2 , alarm . Press "f" key to select. Press “v/a” to confirm and go to the next screen. 2 nd screen: when ro1 mode is set as momentary mode, the 2 nd screen is momentary delay time. The range is“300 - 5000 ms”. Press “f” and “v/a”to ...

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    36 5 th screen: ro1 alarm threshold setting. The threshold setting range is the same as the measurement range. Voltage: 0-1200,current: 0-50000,power 0-60000. Press "f” and “v/ a”to edit the vaule. Press “v/a to confirm and go to the next screen. 6 th screen: ro1 alarm delay time 0-255,unit: second....

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    37 9 th screen: ro2 alarm parameter when ro is set as alarm mode. 0,no alarm;1,voltage;2,current;3,power. Press "f" key to select. Press “v/a” to confirm and go to the next screen. 10 th screen:ro2 alarm inequality setting. 1, larger than; 0,smaller than. Press "f" key to select. Press “v/a” to conf...

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    38 12 th screen: ro2 alarm delay time 0-255,unit: second. The left figure shows the delay time is 15. When the alarm condition is met, after 15 seconds, alarm will be triggered. Or when the alarm condition is no longer met, after 15 seconds, the alarm will be restored. Press “f” and “v/a”to edit the...

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    39 in the metering data mode, hold "v/a" key for 3 seconds to en- ter meter serial number display mode. It displays the last 8 digits of the meter serial number.The left figure shows the meter serial number is dc12012501. Press“v/a” key to return to the metering data mode. Figure 3-42 meter serial n...

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    40

  • Page 49: 4.1  Modbus-Rtu Protocol

    41 4.1 modbus-rtu protocol 4.2 communication format 4.3 communication address table chapter 4 communication.

  • Page 50: 4.1 Modbus-Rtu Protocol

    42 this chapter will mainly discuss how to operate the meter via communication port using software. To master this chapter, you should be familiar with modbus and read other chapters of this manual to make sure that you have a good understanding of the functions and applications of this product. Thi...

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    43 2. Modbus protocol 2.1 frame when data frame reaches the terminal unit,the unit removes the data frame's header, reads the data, if there is no error, then it implements the data's task. Afterwards, the unit puts its own data with the acquired header, and sends back the frame to the sender. The r...

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    44 code meaning action 01 read ro status obtain relay output current status (on/off) 02 read di status obtain digital input current status (on/off) 03 read holding register obtain current binary value of one or multiple registers 05 control ro control relay output(on/off) 16 preset multiple register...

  • Page 53: 4.2 Communication Format

    45 the receiving device recalculates the crc value during reception of the message, and com- pares the calculated value to the actual value it received in the crc field. An error will be reported if the two values are not equal. Crc calculation is first started by preloading the whole 16-bit registe...

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    46 data start reg hi: start register address, high byte data start reg lo: start register address, low byte data #of reg hi: number of registers, high byte data #of reg lo: number of registers, low byte crc16 hi: crc high byte crc16 lo: crc low byte 1. Read relay output status(function code 01) quer...

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    47 addr fun byte count data crc16 hi crc16 lo 11h 01h 01h 02h d4h 89h data bytes 7 6 5 4 3 2 1 0 0 0 0 0 0 0 1 0 (relay 1=off,relay 2=on) table 4-5 response frame of reading relay output status 2. Read di status (function code 02) this function allows the user to obtain di status on/off(1 = on , 0 =...

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    48 addr fun byte count data0 crc16 hi crc16 lo 11h 02h 01h 01h 64h 88h data 3. Read data(function code 03) query this function allows the master to obtain the measurement results from the meter. Table 4-8 depicts reading slave device (address 1) voltage. Acudc 240 voltage address is 0200h-0201h. Add...

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    49 table 4.9 depicts the response of v=402851d8h(2.6299953v). Addr fun byte count data1 hi data1 lo data2 hi data2 lo crc16 hi crc16 lo 01h 03h 04h 40h 28 51 d8 52 31h table 4-9 response frame of reading voltage 4. Control relay output (function code 05) query this query frame forces the relay statu...

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    50 5. Preset multiple registers (function code 16) query function code 16(10h hex) allows the user to modify the contents of multiple registers. Acudc 240 system parameters can be written by this function code. The following example depicts how to preset slave device 1's ao1 parameter (current), low...

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    51 address parameter data type property 0200h , 0201h voltage float r 0202h , 0203h current float r 0204h , 0205h power float r 0206h , 0207h ao1 float r 0208h , 0209h ao2 float r table 4-14 real-time measurement address table note:the high byte is followed by the low byte. Running time the data spa...

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    52 parameter relationship unit voltage real =rx v current real =rx a power real =rx kw energy real =rx/100 kwh ao real =rx v or ma ( depends on the ao type) running time real =rx/100 hour table 4-15 the relationship between register value and real value system parameter setting address the system pa...

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    53 010dh ao1 upper limit 0~100 (percentage) 100 word r/w 010eh ao2 parameter 0 :voltage; 1 :current; 2 :power 0 word r/w 010fh ao2 lower limit sign 0 : + ; 1 : - ; 2 :± 0 word r/w 0110h ao2 lower limit 0-100 (percentage) 0 word r/w 0111h ao2 upper limit sign 0 : + ; 1 : - ; 2 :± 0 word r/w 0112h ao2...

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    54 di status use function code 02 to read di status. Address parameter range data type property 0000h di1 1=on , 0=off bit r 0001h d12 1=on , 0=off bit r table 4-17 di address relay status use function code 01 to read relay status, function code 05 to control. Address parameter range data type prope...

  • Page 63: Appendix

    55 appendix appendix a technical data and specification appendix b ordering information appendix c version information.

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    56 appendix a technical data and specification 1. Measurement parameter accuracy resolution range voltage 0.2% 0.001v 0-1200v current 0.2% 0.005a 0 - ±50000a power 0.5% 0.001kw 0 - ±60000kw energy 0.5% 0.01kwh 0 - 9999999.99kwh drift with temperature stability 0.5‰/year 2. Input dc voltage input ran...

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    57 relay output(ro) type mechanical, form a max load volage 250vac/30vdc max load current 3a on resistance 100mΩ(max) isolation voltage 4000vac mechanical life 5 × 10 6 analog output range 4 - 20ma/0 - 20ma; 0 - 5v/1- 5v accuracy 0.5% load capacity ma type: max load resistance 750Ω v type: max load ...

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    58 power supply input (p1)100-240vac, 50/60hz, 100-300vdc (p2) 20-60vdc consumption 3w(typical) operating environment operating temperature -25°c ~ +70°c storage temperature -40°c ~ +85°c humidity 5%~95% non-condensing.

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    59 acudc 240 acudc 241: voltage meter acudc 242: current meter acudc 243: multifuncion meter model power supply p1: 100 - 240vac,50/60hz,100 - 300vdc p2: 20 - 60vdc voltage a0:0 - ±20a a1:shunt(50 - 100mv) a2:current type hall elememnt(4 - 20ma/12ma±8ma) a3:voltage type hall effect sensor(0 ~ ±5v/0 ...

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    60 voltage hall effect sensor ordering information note: 1. When the input voltage is above 1000v, or the system design requires an isolation, the voltage input can be selected as via hall effect sensor. The voltage hall effect sen- sor requires 0-5 v. 2. I/o x1 type is configured as 4 - 20ma by fac...

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    61 appendix c version information version data description v1.01 20120723 1 st version.

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    Your power and automation partner accuenergy corp. Los angeles-toronto-beijing north america toll free: 1-877-721-8908 web: www.Accuenergy.Com email: support@accuenergy.Com your power and automation partner.