Panasonic Eco-POWER KW7M User Manual
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Panasonic Eco-POWER KW7M User Manual

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Summary of Contents for Panasonic Eco-POWER KW7M

  • Page 2 【KW7M】 Basic setting to measure by Eco-POWER METER When wiring the main unit and the current transformer (CT) and setting the mode 1 after power on, you can measure the power In order to use the other functions, the settings of the each parameter are necessary. How to use What to do Mount / Connection...
  • Page 3 Copyright and trademark ● Panasonic Industrial Devices SUNX Co., Ltd. owns the copyright of this manual. ● We stiffly refuse the reproduction of without permission from this manual. ●Modbus Protocol is a communication protocol that the Modicon Inc. developed for PLC.
  • Page 4 Introduction Thank you very much indeed for purchasing “KW7M Eco-POWER METER”. In this manual, we explain the usage of “KW7M Eco-POWER METER” in detail. Please use it correctly after understanding the content enough.

  • Page 5: Table Of Contents

    Table of Contents Cautions before using ..........................ⅰ Chapter 1 Unit’s Features and Structure ....................1 1.1 Features..............................1 1.2 Unit’s Name and Model Numbers......................1 1.2.1 Main unit ............................1 1.2.2 Option ............................. 1 1.3 Measurement items ..........................1 Chapter 2 Parts Name and Working......................2 2.1 Parts Names ............................
  • Page 6 Chapter 9 Mounting ..........................38 9.1 Dimensions ............................38 9.1.1 Main unit ............................38 9.1.2 Dedicated CT ..........................39 9.2 DIN rail mounting ........................... 42...

  • Page 7: Cautions Before Using

    Cautions before using ■ Installation environment ◇Do not use the Unit in the following environments. ・Where the unit will be exposed to direct sunlight and where the ambient temperature is outside the range of -10 to 50 C. ・Where the ambient humidity is outside the range of 30 to 85 % RH (at 20℃ non-condensing) and where condensation might occur by sudden temperature changes ・Where inflammable or corrosive gas might be produced ・Where the unit will be exposed to excessive airborne dust or metal particles...
  • Page 8 ■ Power supply ・Connect a breaker to the voltage input part for safety reasons and to protect the device. The breaker that connects to the voltage input part must arrange at the position easily reached, and display shows it is the breaker of the equipment. ・Do not turn on the power supply or input until all wiring is completed.

  • Page 9: Chapter 1 Unit's Features And Structure

    KW7M Eco-POWER METER Chapter 1 Unit’s Features and Structure 1.1 Features ■KW7M Eco-POWER METER is a watt-meter of DIN rail installation type. Electric power, voltage, current, etc. are measured using AC voltage and AC current input via one of the following systems. ■Eco-POWER METER is designed chiefly to manage saving energy.

  • Page 10: Chapter 2 Parts Name And Working

    KW7M Eco-POWER METER Chapter 2 Parts Name and Working 2.1 Parts Names ①Display indicator ・Lighting or Blinking according to the display ②LOCK indicator ・Lighting while in lock mode ③T/R indicator ・Blinking while communication ④OUT indicator ・Lighting when pulse output ⑤Display each value ・...

  • Page 11: Chapter 3 Wiring

    KW7M Eco-POWER METER Chapter 3 Wiring 3.1 Main unit terminal arrangement Be sure to wire correctly according to the terminal arrangement and wiring diagrams. Functions Power 1, R, R supply 2, N, S Measured (common) voltage input 3, T, T No connection (N.C.) ＋...

  • Page 12: Wiring Diagrams

    KW7M Eco-POWER METER 3.2 Wiring Diagrams Please connect a breaker (3 to 15A) to the voltage input part for safety reasons and to protect the device. Grounding the secondary side of VT (Voltage transformer) and CT (Current transformer) is not necessary with low-voltage circuit.
  • Page 13 KW7M Eco-POWER METER ◆How to attach the Current Transformer (CT) ・One CT is needed when measuring 1P2W. Two CTs are needed when measuring 1P3W/3P3W. Using all CTs for one Eco-POWER METER should be the same. ・Check beforehand that the thickness of the electric wire is smaller than the through-hole of the CT. ・When connecting CT, connect the secondary side to the terminal of the main unit first, and after that wire the primary side to a load electric wire.

  • Page 14: For Output Connection

    KW7M Eco-POWER METER Without ammeter Power supply Breaker Shorted or resistor less than 0.1Ω Secondary current CT with 2nd current 5A Eco-POWER METER Dedicated CT for 5A Load 3.3 For Output connection ・Since the transistor output is insulated from the internal circuit by a photo-coupler, it can be used both as a NPN output and PNP (equal value) output.

  • Page 15: Rs485 Communication

    KW7M Eco-POWER METER 3.4 RS485 Communication Recommended Cable Use the transmission cables shown below for Eco-POWER METER RS485 communication system. 1) Use shielded type twist cables. 2) Use only one type of the transmission cables. Do not mix different types of the cables. 3) Use twist pair cables under a bad noise environment.

  • Page 16: Chapter 4 Settings

    KW7M Eco-POWER METER Chapter 4 Settings 4.1 Operation procedure 【Basic setting to measure】 When wiring Eco-POWER METER and CT and setting mode 1 after power on, Eco-POWER Meter can measure the electric power. In order to use the other functions, set mode2 and 3 according to your use. MODE1: Mode for setting each parameter for power measurement Monitor (Display when power on) <MODE>...
  • Page 17 KW7M Eco-POWER METER Mode 2: Mode for setting of each parameter for serial communication Mode 3: Mode for setting of each parameter for optional function Monitor (Display when power on) <MODE> Setting mode (Mode 1) (Mode 2) (Mode 3) <SET> <SET>...

  • Page 18: Setting Mode Explanation

    KW7M Eco-POWER METER 4.2 Setting Mode Explanation ■The value with under line is initial setting among each setting value. ☆Set before measurement. 4.2.1 MODE1 (Mode for setting each parameter for power measurement.) Phase/Wire system setting mode SYST Mode defines phase and wire system to measure. ・Select from Single-phase 2-wire / Single-phase 3-wire / Three-phase 3-wire.
  • Page 19 KW7M Eco-POWER METER Current alarm setting mode AL-C *Only when “AL-C” is selected on unit for pulse output setting mode. Mode defines the ratio of current used for alarm output. (Ratio for the rated current) ・It is set the range of 1.0 to 100.0%. Stand-by alarm setting mode 1 AL-S *Only when “AL-S”...
  • Page 20 KW7M Eco-POWER METER CT type setting mode Press <ITEM/△>,<SHIFT/▽> to change 50 ⇔ 100 ⇔ 250 ⇔ 400 ⇔ 5. Primary side current of CT setting mode *It is only when “5A” is selected on CT type setting mode. Set primary side current of CT using <ITEM/△>,<SHIFT/▽>. If primary current of measured CT is 100A (secondary is 5A), set to 100.
  • Page 21 KW7M Eco-POWER METER Unit for pulse output setting mode Press <ITEM/△>, <SHIFT/▽> to change 0.001→0.01→0.1→1→10→100→ AL-P(Power alarm)→AL-C(Current alarm)→AL-S(Stand-by alarm). 0.001 0.01 AL-P AL-C AL-S ↓<SET> *It is only when “AL-P” is selected on unit for pulse output setting mode. Power alarm setting mode Display changes to set an alarm value after “AL-P”...
  • Page 22 KW7M Eco-POWER METER Stand-by alarm setting mode 1 *It is only when “AL-S” is selected on unit for pulse output setting mode. Display changes to set an alarm value after “AL-S” is displayed at the upper line for 1 sec. Set a ratio (for the rated current) of current used for threshold value to judge stand-by power using <ITEM/△>,<SHIFT/▽>.

  • Page 23: Mode2

    KW7M Eco-POWER METER 4.2.2 MODE2 (Mode for setting of each parameter for serial communication (RS485)) Protocol setting mode PROT Mode defines communication protocol of main unit via serial communication (RS485). ・Select from MEWTOCOL / MODBUS(RTU). Station number setting mode Mode defines an individual station no. for each unit when two or more units communicate via serial communication (RS-485).
  • Page 24 KW7M Eco-POWER METER MODE2 Setting flow chart Monitor ↓<MODE> MODE 1 display ↓<ITEM/△> MODE 2 display ↓<SET> Protocol setting mode Press <ITEM/△>, <SHIFT/▽> to change MEWTOCOL ⇔ MODBUS(RTU). <ITEM/△＞ <SHIFT/▽> MEWTOCOL MODBUS(RTU) ↓<SET> Station number setting mode Set the station number using <ITEM/△>,<SHIFT/▽>. ( 1 to 99) <ITEM/△>...
  • Page 25 KW7M Eco-POWER METER Transmission format setting mode Press <ITEM/△>,<SHIFT/▽> to change 8bit-o ⇔ 7bit-n ⇔ 7bit-E ⇔ 7it-o ⇔ 8bit-n ⇔ 8bit-E. n: not available E: even number o: odd number 8bit-o 7bit-n 7bit-E 7it-o 8bit-n 8bit-E ↓<SET> Response time setting mode Set the response time using <ITEM/△>,<SHIFT/▽>.

  • Page 26: Mode3

    KW7M Eco-POWER METER 4.2.3 MODE3 (Mode for setting of each parameter for optional function) Auto-off setting mode Display LED turns off automatically when there is no key operation for a long time. ・Off time can be set the range of 0 to 99min. “0”...

  • Page 27: Chapter 5 Various Functions

    KW7M Eco-POWER METER Chapter 5 Various Functions 5.1 LOCK mode It is the mode makes all keys unable. Use when you want to fix one of the measurement displays (For all displays). In this mode, you can not input by any keys. When you press <SET>...

  • Page 28: Stand-By Power Alarm

    KW7M Eco-POWER METER 5.3.4 Stand-by power alarm When it detects stand-by power (current) of the measured load, pulse output (transistor output) turns on in order to notice. Set current (C) and stand-by time (T) to judge stand-by power. When the measured load is satisfied the setting conditions, pulse output (transistor output) turns on in order to notice.

  • Page 29: Chapter 6 Display Of Each Value

    KW7M Eco-POWER METER Chapter 6 Display of each Value 6.1 Outline for the Working of Monitor Display Integral Instantaneous Electricity Current Voltage electric power Electric power Charge L1(CT1)-phase Voltage current between 1 and 2 L2(CT2)-phase Voltage current between 2 and 3...

  • Page 30: Integral Electric Power

    KW7M Eco-POWER METER 6.2 Integral electric power ・It displays the integral electric power(kWh). Lighting ・ Integral electric power is measured and displayed from 0.00kWh to 9999999.9kWh. ・The decimal point is changed automatically. 0.00 999999.99 1000000.0 9999999.9 (After reaching the full scale (9999999.9kWh), the value reverts to 0.00kWh but continues to measure.) How to reset the integral electric power ・Press <MODE>key while pressing <SET>key makes integral electric power clear.

  • Page 31: Current

    KW7M Eco-POWER METER 6.4 Current ・It displays the current value of the load. ・Press <SHIFT/▽> to change L1(CT1)-phase current to L2(CT2)-phase current. *Before start measuring, select phase and wire system according to the measured load. When Single-phase 3-wire or Three-phase 3-wire is selected, it doesn’t measure Single-phase 2-wire system correctly.

  • Page 32: Electricity Charge

    KW7M Eco-POWER METER ・Voltage measurement parts Eco-POWER METER measures the voltage as below. Display System Voltage between 1 and 2 － Single-phase two-wire （R-phase） Voltage between 1 and 2 Voltage between 2 and 3 Single-phase three-wire （R-phase） (T-phase) Voltage between 1 and 2 Voltage between 2 and 3 Three-phase three-wire （Between R and S line）...

  • Page 33: Chapter 7 Mewtocol Communications

    KW7M Eco-POWER METER Chapter 7 MEWTOCOL Communications 7.1 Communication Procedures Communication starts with command transmission from the host computer (hereafter Master) and ends with the response of Eco-POWER METER (hereafter Slave). Master Slave • Response with data Command When master sends reading command, slave responds with the Data corresponding set value or current status.

  • Page 34: Mewtocol Communication

    KW7M Eco-POWER METER 7.3 MEWTOCOL Communication 7.3.1 Overview of MEWTOCOL-COM (RS-485) ◆Command and response functions The computer sends commands (instructions) to Eco-POWER METER, and receives responses in return. This enables the computer and Eco-POWER METER to converse with each other, so that various kinds of information can be obtained and provided.

  • Page 35: Data Register List

    KW7M Eco-POWER METER 7.3.2 Data Register List Data register Name Unit Kind of data Range DT00050 Rate 0.01 0 to 9999 Sign-less 16bit DT00100 Integral electric 0.01kWh 0 to 999999999 Sign-less 32bit power DT00101 L1 (CT1)-phase DT00107 0.1A 0 to 60000 Sign-less 16bit current L2 (CT2)-phase...

  • Page 36: Error Codes

    KW7M Eco-POWER METER 7.3.3 Error Codes ◆Basic procedure errors Error code Error name Explanation ・A Bcc error occurred in the command data. Bcc error ・A command message was sent that does not fit the transmission Format error format. ・A command was sent that is not supported. No support error ・Delimiter with multiple frames was sent.
  • Page 37 KW7M Eco-POWER METER ◆ [MD]: Register or Reset data monitored (Registers the data to be monitored.) *Up to 16 points can be registered for one unit. ◇ Command (Register) Data specification ① Data specification Word No. Word No. Destination ％ ＃...

  • Page 38: Modbus (Rtu) Communication

    KW7M Eco-POWER METER 7.4 MODBUS (RTU) Communication 7.4.1 Overview of MODBUS (RTU) ◆8-bit binary data in command is transmitted as it is. Data format Start bit : 1 bit : 8 bits ＊7bits is not available. Data bit Parity : No parity, Even parity, Odd parity Selectable Stop bit : 1 bit (Fixed) Error detection...
  • Page 39 KW7M Eco-POWER METER ◇Data: Data depends on the function code. A request message from the master side is composed of data item, number of data and setting data. A response message from the slave side is composed of number of bytes, data and exception code in negative acknowledgement.
  • Page 40 KW7M Eco-POWER METER <3> Reset integral electric power (0064H, 0065H: 2-word) of address 1 (When setting to 0 [0000, 0000H]) ・Command Number of Slave Function Data item Number of ⇒ 3.5 idle data item to address code data characters write (01H) (10H) (0064H)

  • Page 41: Data Register List

    KW7M Eco-POWER METER 7.4.2 Data Register List Range: Hexadecimal MODBUS Data item Name Unit Kind of date (Range: Decimal) Function code (MEWTOCOL) 0032H 03H/ 0H to 270FH (0 to 9999) Rate 0.01 Unsigned 16bit (DT00050) 06H/10H 0064H (DT00100) Integral electric 0H to 3B9AC9FFH 03H/ 0.01kWh...

  • Page 42: Chapter 8 Specifications

    KW7M Eco-POWER METER Chapter 8 Specifications 8.1 Main unit Rated operating voltage 100 / 200V AC Rated frequency 50/60Hz common Rated power consumption 6VA (240V AC at 25℃) Allowable operating 85-132/170-264V AC (85%～110% of rated operating voltage) voltage range Allowable momentary 10ms power-off time Ambient temperature...

  • Page 43: Pulse Output (Transistor Output) Specifications

    KW7M Eco-POWER METER Instantaneous electric power / Integral electric power / Electricity charge Within ± (2.0 % F.S. + 1 digit) (at 20 °C, rated input, rated frequency, power factor 1) In case of 5 A CT mode, within ± (2.5 % F.S. + 1 digit) *Accuracy coverage:5 to 100% of rated current Basic Current...

  • Page 44: Communication Specifications

    KW7M Eco-POWER METER 8.4 Communication Specifications Interface Conforming to RS-485 Protocol MEWTOCOL/MODBUS(RTU) (selectable with setting mode) Isolation status Isolated with the internal circuit ※ ※ Number of connected units 99 (max.) ※ Transmission distance 1200m (max.) Transmission speed 38400/19200/9600/4800/2400bps (selectable with setting mode) ※...

  • Page 45: Dedicated Current Transformer Specifications

    KW7M Eco-POWER METER 8.8 Dedicated Current Transformer Specifications ●Clamp-on type Model No AKW4801C AKW4802C AKW4803C AKW4804C Primary side rated current 5A / 50A 100A 250A 400A Secondary side rated 1.67mA / 33.3mA 125mA 200mA Current 16.7mA Transform ratio 3000:1 3000:1 2000:1 2000:1 ±2.0% F.S.

  • Page 46: Chapter 9 Mounting

    KW7M Eco-POWER METER Chapter 9 Mounting 9.1 Dimensions (Unit: mm) (Clearance: ±1.0) 9.1.1 Main unit...

  • Page 47: Dedicated Ct

    KW7M Eco-POWER METER 9.1.2 Dedicated CT ◆For 5A/50A (AKW4801C) ◆For 100A (AKW4802C)
  • Page 48 KW7M Eco-POWER METER ◆For 250A (AKW4803C) ◆For 400A (AKW4804C)
  • Page 49 KW7M Eco-POWER METER ◆For 50/100A (AKW4506C) ◆For 250A/400A (AKW4507C) ◆Attached trunk cable (common)

  • Page 50: Din Rail Mounting

    KW7M Eco-POWER METER 9.2 DIN rail mounting (1) Hook A of main unit on the upper side of DIN rail. (2) Making A part as a support, fit B the lower part of main unit to DIN rail. (3) Main unit will be completely fixed to DIN rail with a “click” sound.
  • Page 51 KW7M Eco-POWER METER Revision History Issue Date Manual no. Content of revision July, 2007 ARCT1F434E First edition October, 2007 ARCT1F434E-1 Second edition 5-2 Wiring: Add the explanation in detail. October, 2008 ARCT1F434E-2 Third edition ・Change company name May, 2011 ARCT1F434E-3 edition Add functions ・Current alarm...
  • Page 52 ©...

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