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KW8M Eco-POWER METER

52

Chapter 7 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).

• Response with data

When master sends reading command, slave responds with the
corresponding set value or current status.

• Acknowledgement

When master sends setting command, slave responds by sending
the acknowledgement.

• Negative acknowledgement

When master sends a non-existent command or value out of the setting
range, the slave returns negative acknowledgement.

• No response

Slave will not respond to master in the following cases.

• Global address “FF” (MEWTOCOL) is set.
• Broadcast address “00H” (Modbus protocol) is set.
• Communication error (framing error, parity error)
• CRC-16 discrepancy (Modbus RTU mode)

7.2 Communication timing

◆

The minimum access time from the master is 1 sec. (Minimum time for update the data)

Eco-POWER METER may not response due to noise and so on, be sure to check that it receives the
response from Eco-POWER METER.

◆

In order to improve the communication quality, we recommend to send the transmission again.

Communication timing of RS485

◇

Eco-POWER METER (Slave) side

When Eco-POWER METER (Slave) starts transmission to RS485 communication line, it is arranged
so as to provide an idle status transmission period of about 1 to 99ms (setting available) +Tb before
sending the response to ensure the synchronization on the receiving side. After sending the response,
master can disconnect the transmitter from the communication line within transmission period 20ms.
(Tb: Transmission period may be longer (0 to 60ms) due to Eco-POWER METER’s process.)

◇

Master side (Cautions of setting a program)

At communication, keep the following conditions.
1) Set the program so that the master can disconnect the transmitter from the communication line

within the transmission period of about 2ms after sending the command in preparation for reception
of the response from Eco-POWER METER (Slave).

2) To avoid collision of transmissions between the master and Eco-POWER METER (Slave), send a

next command after checking that the master received the response.

Master

Slave

Command

Data

Acknowledgement

Command

Negative

acknowledgement

Command

No response

Command

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59
60
61
62
63
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Summary of Contents for KW8M

Page 1: ......

Page 2: ... Measure Power Mount Connection Settings Count pulse output from other device Output Alarm Wire the main unit Connect the current transformer CT Wire output line Collect data via RS485 Wire communication line Wire input line Power on the main unit Set the parameter for pulse measurement Check measured data with power monitoring mode Set alarm output MODE1 Check count value with power monitoring mo...

Page 3: ...onnection Settings Count pulse output from other device Output Alarm Log data Read out log data Wire the main unit Connect the current transformer CT Wire output line Collect data via RS485 Prepare the tool software Wire communication line Wire input line Power on the main unit Initialize memory of main unit MODE4 and set calendar timer MODE5 Set the parameter for pulse measurement Set log setting...

Page 4: ... maximum of the characteristics and performance that are assured in these specifications Do not dismantle or remodel the product It could lead to abnormal exothermic heat or smoke generation Do not touch the terminal while turning on electricity It could lead to an electric shock Use the external devices to function the emergency stop and interlock circuit Connect the wires or connectors securely ...

Page 5: ...roduction Thank you very much indeed for purchasing KW8M Eco POWER METER In this manual we explain the usage of KW8M Eco POWER METER in detail Please use it correctly after understanding the content enough ...

Page 6: ...ric power alarm 30 5 3 3 Current alarm 30 5 3 4 Stand by power alarm 30 5 3 5 Output depends on count value 30 5 3 6 Demand alarm 30 5 4 Counter function 31 5 4 1 Operation mode 31 5 4 2 Change the Preset Value 31 5 5 Simple demand function Only AKW8111H 32 Chapter 6 Display of each Value 34 6 1 Working of Monitor Display 34 6 2 Outline for the Working of Power Monitoring Mode Display 35 6 2 1 Int...

Page 7: ...w to Replace Battery 67 8 3 How to Remove 68 8 4 How to Mount 68 Chapter 9 Specifications 69 9 1 Main unit 69 9 2 Input Specifications 70 9 2 1 Electric power input 70 9 2 2 Pulse input 70 9 3 Pulse output Transistor output Specifications 71 9 4 Communication Specifications 71 9 5 Option Specifications only for AKW8111H 72 9 5 1 Logging 72 9 5 2 Simple Demand 72 9 6 Self diagnostic function 73 9 7...

Page 8: ...power supply input and output Do not perform wiring or installation with a live line It may also lead to circuit burnout or fire by way of the secondary CT side opening Installation Installation and wiring must be performed by expert personnel for electrical work or electric piping The power supply terminal and voltage input terminal of the main unit is common Therefore if additional noise effects...

Page 9: ...ot turn on the power supply or input until all wiring is completed Before power on Please note the following points when turning on power at the first time Confirm there are neither wiring rubbish nor especially an electrical conduction when installed Confirm neither the power supply wiring the I O wiring nor the power supply voltage are wrong Tighten the installation screw and the terminal screw ...

Page 10: ...sformer Terminal type Single phase two wire Single phase three wire Three phase three wire Three phase four wire 100 240V AC 50 60Hz 400VAC 100 200VAC 50A 100A 250A 400A 600A Dedicated CT type Screw Terminal M3 screw 1 2 2 Option Dedicated Current Transformer CT Clamp on type Product name Rated primary current Model No Dedicated current transformer for 5A 50A 5A 50A AKW4801B Dedicated current tran...

Page 11: ...ithin the range of phase angle θ 90 to 0 to 90 degree Frequency Hz 47 5 to 63 0 Hour meter ON time hour 0 0 to 99999 9 OFF time Pulse counter 0 to 99999999 Simple demand 2 Present demand kW 0 00 to 999999 99 Estimated demand kW 0 00 to 999999 99 Ratio of estimated demand 0 0 to 9999 9 1 Eco POWER METER is designed chiefly to manage saving energy It is neither intended nor can it be legally used fo...

Page 12: ...lect Keys Functions Key Functions MODE Use to select mode SET Use to set each value entered ITEM To select measured display To shift each mode To change each setting value SHIFT To select measured display To shift each mode To change each setting value Left Right To change each setting value SET MODE To reset the measured value SET All keys locked Release lock mode while in lock mode continuous pr...

Page 13: ...on for Wiring 1 Terminal fastening torque should be 0 6 to 1 0N m 2 This has no built in power switch circuit breaker for power supply part To protect the device it is necessary to install power switch and circuit breaker in the power supply circuit And this has no built in power switch circuit breaker or fuse for measured voltage input parts Therefore it is necessary to install them in the circui...

Page 14: ...rrent transformer is not necessary with low voltage circuit When measuring a load with rated input voltage Single phase two wire system One current transformer CT is required to measure single phase two wire system Back view Single phase three wire Two CTs are required to measure single phase three wire system Wire by diagram of single phase 2 wire system when measure load using R S with single ph...

Page 15: ...ER METER 6 Three phase three wire system Two CTs are required to measure three phase three wire system Back view Three phase four wire system Three CTs are required to measure three phase four wire system Back view ...

Page 16: ...voltage circuit Single phase two wire system Single phase three wire Back view Back view No 13 14 17 20 are not wired No 14 19 20 are not wired Three phase three wire system Three phase four wire system Back view No 14 19 20 are not wired Back view CT1 11 12 13 14 15 16 L N VT P1 P0 k l 11 12 13 14 15 16 17 18 CT1 R N S CT2 P1 P0 P2 k l k l VT 11 12 13 14 15 16 17 18 19 20 R S T N P1 P0 P2 P3 VT C...

Page 17: ...ore cross section under the environment without noise at all Please use the thick cable as much as possible Please check beforehand with the actual system in case of extending the cable If there is some distortion by harmonic or waveform it may not measure correctly Please check with the actual system before adopting it Separate the wiring strong electric part of the measured voltage input termina...

Page 18: ...re than 100kΩ Input wiring Please wire up to 10m by using a shielded wire or a metallic electric wire tube individually If it is long it may not work correctly due to floating capacitance of wire Note Operating power supply input part and measured voltage input are not insulated to pulse input parts So the input equipment must have the power supply transformer in which the secondary side is not gr...

Page 19: ...be shorted E terminal is not SG signal ground terminal Do not ground shielded cable Fig 2 Correct wiring Incorrect wiring Terminal Terminal station station Shielded cable To RS485 device Shielded cable Eco POWER METER General station Eco POWER METER Terminal station Class D grounding Class D grounding E E Shorted Fig 1 Eco POWER METER Eco POWER METER Auto transformer Fig B No Good example Do not g...

Page 20: ...e output part and communication part secure only basic insulation In order to secure reinforced double insulation demanded by EN 61010 1 IEC61010 1 secure basic insulation or more with load side for output part and secure basic insulation or more with communication system side for communication part 2 Provide the voltage input part with an EN60947 1 or EN60947 3 compliant circuit breaker The break...

Page 21: ... to the next page SET CT type setting mode CT T SET When select 5A Primary side current of CT setting mode CT 1 When select other than 5A SET Voltage range setting mode VOLT SET SET VT setting mode VT SET Current for time measurement setting mode HM A SET Cutoff current setting mode CUTA SET Unit for pulse output setting mode PL P When select Values When select AL P SET When select AL C SET When s...

Page 22: ...power on MODE Setting mode Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 1 SET SET SET SET SET Refer to the previous page Max counting speed setting mode Hz Protocol setting mode PROT Auto off setting mode OFF Calendar timer setting mode CAL 1 SET SET SET SET Prescale setting mode PSCL Station number setting mode NO Log cycle setting mode LOG 1 SET SET SET Transmission speed setting mode SPD Initialize memor...

Page 23: ...lse output 0 001 Protocol MEWTOCOL Power alarm 999999 99 Station number 1 Current alarm 100 0 Transmission speed 19200 Stand by alarm1 100 00 Transmission format 8bit o Stand by alarm 2 0 Preset value 0 Response time 5 Demand alarm 1 1 0 00 Demand alarm 2 1 0 Demand alarm 3 1 10 Electricity rate 10 00 Mode 4 Mode 5 Item Initial value Item Initial value Auto off 0 Calendar timer 1 2000 Jan 1 00 00 ...

Page 24: ...ination with existing CT by selecting 5A in the CT type setting mode In this case it is necessary to set the primary side current Primary side current of the existing CT can be set the range of 1 to 4000 Initial 5 When connecting 5ACT directly and measure with 5A range set to 5 ex If primary current of measured existing CT is 400A secondary side is 5A set to 400 Voltage range setting mode VOLT Mod...

Page 25: ...conditions Power alarm setting mode AL P Only when AL P is selected on unit for pulse output setting mode Mode defines instantaneous electric power used for alarm output It is set the range of 0 00 to 999999 99kW 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 ...

Page 26: ...0 min initial 10 minutes Ex When 10 is set alarm output or alarm indication d is not occurred after 10 minutes from the demand span started When 30 is set it doesn t output alarm and it doesn t indicate alarm In case of that DEM1 is set to 0 00kW it doesn t output alarm and it doesn t indicate alarm When DEM is set with unit for pulse output setting mode it outputs if all conditions DEM1 2 and 3 a...

Page 27: ... Press ITEM SHIFT to change 50 100 250 400 600 5 50 100 250 400 600 5 SET 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 measured CT is 100A 5A set to 100 If 5A is measured set to 5 1 to 4000 Initial 5 Increase value Decrease value Shift place to set Shift place to set SET Voltage range setting mode ...

Page 28: ...mode Set current for time measurement using ITEM SHIFT If you measure the current over 50 0 F S set to 50 0 1 0 to 100 0 Increase value Decrease value Shift place to set Shift place to set SET Cutoff current setting mode Set cutoff current using ITEM SHIFT If you don t measure the current under 10 0 F S set to 10 0 1 0 to 50 0 Increase value Decrease value Shift place to set Shift place to set SET...

Page 29: ...ulse output setting mode Display changes to set an alarm value after AL P is displayed at the upper line for 1 sec Set power for alarm using ITEM SHIFT 0 00 to 999999 99 after 1 sec Increase value Decrease value Shift place to set Shift place to set SET Current alarm setting mode It is only when AL C is selected on unit for pulse output setting mode Set current ratio for the rated current for alar...

Page 30: ...ower 1 to 9999 Alarm is output at the time when passing the setting time with the stand by power The alarm can be reset by pressing SET with display of instantaneous electric power current voltage frequency and PF After reset the alarm start to monitor the stand by power again SET Preset value setting mode It is only when Cnt is selected on unit for pulse output setting mode Display changes to set...

Page 31: ...ysteresis to use for decide alarm off timing using ITEM SHIFT 0 to 100 0 Increase value Decrease value Shift place to set Shift place to set SET Demand alarm setting mode 3 Only AKW8111H Set time to start demand monitor using ITEM SHIFT 1 to 30 initial 10 Increase value Decrease value Shift place to set Shift place to set SET Electricity charge setting mode Set the rate per 1kWh using ITEM SHIFT 0...

Page 32: ...pplied to count value and preset value ex When 0 01 Last 2 digit is set the decimal point of count value and preset value has 2 digit under decimal point MODE2 Setting flow chart Monitor MODE MODE 1 display ITEM MODE 2 display SET Max counting speed setting mode Press ITEM SHIFT to change 2000 2kHz 30 30Hz 2000 30 SET Pre scale setting mode Set pre scale value using ITEM SHIFT After 1sec 0 001 100...

Page 33: ...400 2400 4800 9600 bit s Transmission format setting mode FMT Mode defines serial communication RS485 transmission format Data length Parity Define the transmission format according to the master s PLC etc Select from 8bit o 7bit n 7bit E 7bit o 8bit n 8bit E n none means parity is not available E Even means parity is even number o odd means parity is odd number With MODBUS RTU protocol it works o...

Page 34: ...00 2400 4800 9600 19200bps 38400bps 2400bps 4800bps 9600bps SET 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 1 to 99 ms initial 5 Increase value Decrease value Shift place to set Shift place...

Page 35: ... 1 minute select 1 This setting is log save cycle to read out by some software Selected logging In order to check the log data in the memory software is required The recommended software KW Monitor is available to download from our website in free of charge Only hourly log data can be checked with the display of Eco POWER METER As for the save cycle of log data automatic log displayed in the main ...

Page 36: ...be set to turn always light on 1 to 99 should be set to turn light off at setting time minute While light off press any key to light on SET Log cycle setting mode Only AKW8111H Press ITEM SHIFT to change save cycle 60 1 5 10 15 30 60 minutes 1 minute 5 minutes 10 minutes 15 minutes 30 minutes SET Initialize memory of main unit Only AKW8111H Press ITEM SHIFT to change OFF ON Set to ON and memory of...

Page 37: ...lize memory of main unit MODE4 after this setting When it is not initialized it may not display log data correctly MODE5 Setting flow chart Monitor MODE MODE 1 display ITEM 4 times MODE 5 display SET Calendar timer setting mode Only AKW8111H Set the present time using ITEM SHIFT SET Calendar timer can be set the range of 2000 January 1 st 00 00 to 2099 December 31 st 23 59 00 y Blinking Set Year 0...

Page 38: ...tor lights After about 3 sec LOCK is disappeared and the display shift to previous display All keys become locked pressing them will have no effect Press SET continuously for about 3sec again to release Lock mode The LOCK indicator goes off and the lock mode is released unlocked 5 2 Display while communication TX RX indicator is blinking while Eco POWER METER is under communication 5 3 Display whe...

Page 39: ...ns off 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 When it exceeds the setting value it turns off and reset it You can res...

Page 40: ...value is changed to the value less than the count value counting will continue until it reaches full scale returns to 0 and then reaches the new preset value 2 If the preset value is changed to 0 it will not count up at start with 0 It counts up when the counting value comes to 0 again after reach to full scale However output is OFF if count value or preset value is changed 3 When the count value ...

Page 41: ... 1 minute after that Present demand or Estimated demand Demand setting value Keep alarm Present demand or Estimated demand Demand setting value Clear alarm When you set the hysterisis with demand alarm setting mode 2 the timing of clear alarm is as below Ex Demand setting value 100kW Hysterisis 10 When the present demand or the estimated demand exceeds 100kW it output alarm and keep the alarm for ...

Page 42: ... kW Integral electric power for 30 minutes 60 minute Demand span minute Estimated demand EV It shows the estimated demand value at the end of demand span according to the using power from the time when demand span starts to present time Calculation Estimated demand kW Present demand Power change amount for t minutes P Remaining time minute Sampling cycle t minute Demand setting value SV It shows t...

Page 43: ... electric power Active Reactive Apparent Instantaneous electric power Active Reactive Apparent Current CT1 CT2 CT3 Voltage Between P1 P0 Between P2 P0 Between P3 P0 Electricity charge Power Factor Frequency Hour meter Present demand Estimated demand Ratio of estimated demand Demand log Monthly max demand log Demand function is only for AKW8111H AKW8111 doesn t have demand function Pulse counter Op...

Page 44: ...Instantaneous electric power Instantaneous active power SHIFT Instantaneous reactive power SHIFT Instantaneous apparent power ITEM Current L1 CT1 SHIFT L2 CT2 SHIFT L3 CT3 ITEM Voltage L1 P1 P0 SHIFT L2 P2 P0 SHIFT L3 P3 P0 ITEM Electricity charge ITEM Power factor ITEM Frequency ITEM Hour meter Load ON time ON h SHIFT Load OFF time OFF h ITEM Demand Demand power SHIFT Ratio of estimated demand SH...

Page 45: ...nd displayed from 0 00 to 9999999 9 kWh kvarh kVAh The decimal point is changed automatically After reaching the full scale 9999999 9 the value reverts to 0 00 but continues to measure How to reset the integral electric power active reactive apparent Hold down SET and press MODE makes integral electric power clear Active power reactive power apparent power is reset by each Reset SET ON OFF MODE ON...

Page 46: ... show plus 6 2 3 Current It displays the current value of the load Press SHIFT to change L1 CT1 phase L2 CT2 phase L3 CT3 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 When Three phase 4 wire system is selected it doesn t measure Sing...

Page 47: ...wire system correctly When Three phase 4 wire system is selected it doesn t measure Single phase 2 wire Single phase 3 wire Three phase 3 wire system correctly Select phase and wire system according to the measured system Refer to the explanation of setting mode V Lighting When input voltage is under 10 0V at 200V range and when input voltage is under 20 0V at 400V range it displays 0 0 and doesn ...

Page 48: ...he explanation of setting mode Lagging phase Leading phase cosφ Lighting How to calculate power factor Eco POWER METER displays power factor by calculating as below Power factor operation is a method assuming balanced load The error might be big when it measures unbalanced load Single phase two wire Single phase three wire Three phase four wire 1P3W a 2 3P4W a 3 Three phase three wire Voltage ｘ Cu...

Page 49: ...asured by CT1 Press SHIFT to change the load ON time to load OFF time ON h and OFF h display disappears after a few seconds by pressing SHIFT ON time h after a few seconds OFF time h after a few seconds Blinking the decimal point during measurement of ON time TIME Lighting Blinking the decimal point during measurement of OFF time TIME Blinking ...

Page 50: ...o under cutoff current CUTA all current is measured as OFF time Current flow of CT1 Load ON time h 0 HM A CUTA Ratio of load current Measured as OFF h Measured as ON h After reaching the full scale 99999 9h the value reverts to 0 0h but continues to measure ON ON CT Detection OFF OFF Full scale ON time OFF time How to Reset ON OFF time Hold down SET and press MODE makes ON time or OFF time clear O...

Page 51: ...f the demand span first and displays the estimated demand Present demand Present time on the middle line Estimated demand Estimated time on the middle line Demand setting value after 1 second after 1 second after 1 second The present demand is updated every 1 second the estimated demand is updated every 1 minute At present demand or estimated demand is displayed for 1 minute after starting the dem...

Page 52: ...tarts when you change clock to before demand span or to next demand span or at power failure Display of remaining time Remaining time to demand span is displayed at the bottom line with present demand estimated demand and ratio of estimated demand The remaining time is updated every 1 minute Display Elapse time 00 to 59 seconds 1m 00s to 10m 59s 11m 00s to 29m 59s Remaining time 30 minutes 29 to 2...

Page 53: ...ys Press to change the time Press SET to display demand value at time select display Press SET again to return the time select display 0 00 is displayed when there is no data for demand Example November 4 9 00 After 1 second h hour Lighting LOG Lighting DEMAND Lighting kW Lighting November 4 9 30 November 4 10 00 ...

Page 54: ...ct display 0 00 is displayed when there is no data for monthly max demand log and is displayed for the date Example Press to display the date when the value was saved Press to shift the max demand log When there is no saved data it doesn t display the date and is displayed After 1 second September 2011 October 2011 November 2011 The date for the max demand log LOG Lighting DEMAND Lighting kW Turn ...

Page 55: ... and the lower digits Pulse input number 98765432 Prescale setting value 50 001 4938370365 432 Lower digits 8 digit Upper digits 5 digit After reaching the full scale 99999999 x prescale value the value reverts to 0 but continues to measure How to set preset value It is entered and set at preset setting mode of MODE1 Refer to Setting Mode Explanation How to Reset Count value Hold down SET key and ...

Page 56: ...active power SHIFT Integral reactive power SHIFT Integral apparent power ITEM Daily integral electric power Integral active power SHIFT Integral reactive power SHIFT Integral apparent power ITEM Hourly integral electric power Integral active power SHIFT Integral reactive power SHIFT Integral apparent power ITEM Integral active power for arbitrary time ITEM Calendar Month Date Time ITEM ...

Page 57: ...From To April 1st 00 00 00 April 30th 23 59 59 May 1st 00 00 00 May 31st 23 59 59 June 1st 00 00 00 June 31st 23 59 59 Monthly integral electric power Active power kWh Reactive power kvarh Apparent power kVAh May 2008 May 2008 May 2008 Press SHIFT to shift active reactive apparent Select month and it displays monthly integral power after 2 seconds How to shift month to display When date or electri...

Page 58: ... 1st 00 00 00 May 1st 23 59 59 May 2nd 00 00 00 May 2nd 23 59 59 May 3rd 00 00 00 May 3rd 23 59 59 Daily integral Active power kWh Reactive power kvarh Apparent power kVAh electric power May 2008 May 2008 May 2008 Press SHIFT to shift active reactive apparent Select month and day and it displays daily integral power after 2 seconds Select month and day and it displays daily integral power after 2 ...

Page 59: ...o From To 00 00 00 00 59 59 01 00 00 01 59 59 02 00 00 02 59 59 Hourly integral Active power kWh Reactive power kvarh Apparent power kVAh electric power May 1 st 1 00 May 1 st 1 00 May 1 st 1 00 Press SHIFT to shift active reactive apparent Select month and day and it displays daily integral power after 2 seconds Select date and time and it displays hourly integral power after 2 seconds How to shi...

Page 60: ...lectric power active for arbitrary period TIME Lighting kWh Blinking Blinking TIME during measurement Integral electric power is measured and displayed from 0 00 to 9999999 9 kWh The decimal point is changed automatically After reaching the full scale 9999999 9 the value reverts to 0 00 but continues to measure How to reset the integral electric power active Hold down SET and press MODE makes inte...

Page 61: ...se from Eco POWER METER In order to improve the communication quality we recommend to send the transmission again Communication timing of RS485 Eco POWER METER Slave side When Eco POWER METER Slave starts transmission to RS485 communication line it is arranged so as to provide an idle status transmission period of about 1 to 99ms setting available Tb before sending the response to ensure the synch...

Page 62: ...nd source AD H L Two digit decimal 01 to 99 ASCII codes Command messages contain a station number for Eco POWER METER that receives the message When FF ASCII code table is used however the transmission is a global transmission sent to all stations at once Note When a global transmission is sent no response to the command message is returned Block check code Bcc H L Two digit hexadecimal 00 to FF A...

Page 63: ...stand by current 0 1 Unsigned 16bit 10 to 1000 R W DT00078 Time for stand by alarm 1min Unsigned 16bit 0 to 9999 R W DT00100 Integral active power 0 01kWh Unsigned 32bit 0 to 999999999 R W DT00101 DT00102 Integral reactive power 0 01kvarh Unsigned 32bit 0 to 999999999 R W DT00103 DT00104 Integral apparent power 0 01kVAh Unsigned 32bit 0 to 999999999 R W DT00105 DT00107 Current L1A CT1 0 1A Unsigne...

Page 64: ...arh Unsigned 32bit 0 to 999999999 R DT20006 DT20007 Log data Integral apparent power 0 01kVAh Unsigned 32bit 0 to 999999999 R DT20008 DT20009 Log data Voltage L1V 0 1V Unsigned 32bit 0 to 99999 R DT20010 DT20011 Log data Voltage L2V 0 1V Unsigned 32bit 0 to 99999 R DT20012 DT20013 Log data Voltage L3V 0 1V Unsigned 32bit 0 to 99999 R DT20014 DT20015 Log data Current L1A CT1 0 1A Unsigned 16bit 0 t...

Page 65: ...r word D 01H to 31H H 00H to 23H R W DT00074 Calendar timer Year Month Unsigned 16bit Higher word Lower word Y 00H to 99H M 01H to 12H R W DT00075 Calendar timer Day Unsigned 16bit Higher word Day 00H to 06H R W DT00076 Logging cycle setting Unsigned 16bit 6 types 1 1 2 5 3 10 4 15 5 30 6 60 R W DT00080 SRAM Initialize Unsigned 16bit 0 OFF 1 ON R W DT00098 Integral active power for arbitrary perio...

Page 66: ...ds Command name Code Explanation Read data area RD Reads the contents of data area Write data to data area WD Writes data to a data area Resister or Reset data monitored MD Resisters the data to be monitored Monitoring start MG Monitors a registered data Read status RT Reads the specifications of Eco POWER METER and error code if an error occurs RD Read data area Reads the contents of data area Co...

Page 67: ...1 160 163 162 161 160 161 160 161 160 161 160 163 162 161 160 CR With this unit it responses 99 for Model code1 13 for Model code2 Word No Word No Bcc Destination Bcc Fixed 6 characters Source BCC Destination Bcc Source Destination Bcc Source Model code 1 2 characters Model code 2 2 characters Bcc Data No of characters in data line 2 characters Data No of characters Bcc Version Self diagnostic err...

Page 68: ...e message Slave address 0 00H broadcast address can identify all slaves connected However slaves do not respond Function code Function code is command code for the slave to undertake the following action types Function code Contents 03 03H DT Read 06 06H DT1 word write 16 10H DT several data write Function code is used to discern whether the response is normal acknowledgement or if any error negat...

Page 69: ... a carry is generated as a result of the shift XOR is calculated by X of 3 and the fixed value A001H This is assumed as X If a carry is not generated go to step 5 5 Repeat steps 3 and 4 until shifting 8 times 6 XOR is calculated with the next data and X This is assumed as X 7 Repeat steps 3 to 5 8 Repeat steps 3 to 5 up to the last data 9 Set X as CRC 16 to the end of message in sequence from low ...

Page 70: ...3 5 idle characters 1 1 2 2 2 character number A response message from the slave in exception error status When number of data has been mistaken Function code MSB is set to 1 for the response message in exception error status 90H The exception code 03H Value out of the devise numbers is returned as contents of error Mistaken message example Command 3 5 idle characters Slave address 01H Function co...

Page 71: ... Alarm value Instantaneous active power 0 01kW Unsigned 32bit 0H to 5F5E0FFH 0 to 99999999 03H 06H 10H 0041H MSB DT00065 0042H DT00066 VT ratio 0 01 Unsigned 16bit 64H to 270FH 100 to 9999 03H 06H 10H 0043H CT00067 Current threshold for time measurement 0 1 Unsigned 16bit AH to 3E8H 10 to 1000 03H 06H 10H 0044H DT00068 Cutoff current 0 1 Unsigned 16bit AH to 1F4H 10 to 500 03H 06H 10H 0045H DT0006...

Page 72: ... to 999999999 03H 06H 10H 009BH MSB DT00155 009EH LSB DT00158 Preset value Unsigned 32bit 0H to 5F5E0FFH 0 to 999999999 03H 06H 10H 009FH MSB DT00159 00A0H LSB DT00160 Prescale value 0 001 Unsigned 32bit 0H to 186A0H 0 to 100000 03H 06H 10H 00A1H MSB DT00161 00A2H DT00162 Max counting speed Hz Unsigned 16bit 1EH 30 7D0H 2000 03H 06H 10H 00A3H DT00163 Auto off time min Unsigned 16bit 0H to 63H 0 to...

Page 73: ...al active Power 0 01 kWh Unsigned 32bit 0H to 3B9AC9FFH 0 to 999999999 03H 4E24H MSB DT20004 4E25H LSB DT20005 Log data Integral reactive power 0 01 kvarh Unsigned 16bit 0H to 3B9AC9FFH 0 to 999999999 03H 4E26H MSB DT20006 4E27H LSB DT20007 Log data Integral apparent power 0 01 kVAh Unsigned 16bit 0H to 3B9AC9FFH 0 to 999999999 03H 4E28H MSB DT20008 4E29H LSB DT20009 Log data Voltage L1V 0 1V Unsi...

Page 74: ...igned 32bit 0H to 1869FH 0 to 99999 03H F6D8H MSB DT63192 F6D9H LSB DT63193 Log data Voltage L3V 0 1V Unsigned 32bit 0H to 1869FH 0 to 99999 03H F6DAH MSB DT63194 F6DBH DT63198 Log data Current L1A CT1 0 1A Unsigned 16bit 0H to EA60H 0 to 60000 03H F6DCH DT63196 Log data Current L2A CT2 0 1A Unsigned 16bit 0H to EA60H 0 to 60000 03H F6DDH DT63197 Log data Current L3A CT3 0 1A Unsigned 16bit 0H to ...

Page 75: ...FH 0 to 99999999 03H 00C9H MSB DT00201 00CBH LSB DT00203 Estimated demand 0 01kW Unsigned 32bit 0H to 5F5E0FFH 0 to 99999999 03H 00CCH MSB DT00204 00CDH LSB DT00205 Demand setting value 0 01kW Unsigned 32bit 0H to 5F5E0FFH 0 to 99999999 03H 06H 10H 00CEH MSB DT00206 LSB Least significant byte MSB Most significant byte note 1 03H Read 06H 10H Write 2 Data register except specified is 0 3 If each se...

Page 76: ...g long time with battery OFF initialize the memory by memory initialize mode MODE4 or it can not indicate logging data correctly Note Use an insulated tool to set switch 8 2 How to Replace Battery Battery life is about 5 years at 25 However using under high temperature makes the life short When battery has abnormal or battery power is reduced E is blinking in the bottom line Please replace the bat...

Page 77: ...en holder and battery and take battery and put it on the stopper 4 Push battery to the marked direction from back and take it 8 4 How to Mount Mount new battery within 3 minutes after removing the old battery 1 Insert the battery in a battery holder horizontally and insert by the marked direction with side facing up 2 Make sure the battery is securely placed in the battery holder Connector Hooks H...

Page 78: ...e All terminals B Insulated circuit Operating power supply terminals Analog input terminals Operating power supply terminals Pulse input terminal RS485 All other terminals Pulse output terminals All other terminals note1 Insulation resistance initial Between the isolated circuits 100MΩor more measured at 500V DC Vibration resistance 10 to 55Hz 1cycle min single amplitude 0 375mm 1h on 3 axes Shock...

Page 79: ...our meter 1 0 to 100 0 F S Accuracy without error in CT and VT Instantaneous electric power active reactive apparent Integral electric power active reactive apparent Electricity charge Within 2 0 F S 1 digit In case of 5 A CT mode within 2 5 F S 1 digit at 20 C rated input rated frequency power factor 1 Accuracy coverage 5 to 100 of rated current Current Within 1 0 F S 1 digit at 20 C 68 F rated i...

Page 80: ...s Isolated with the internal circuit Number of connected units 99 max 2 3 Transmission distance 1200m max 1 Transmission speed 38400 19200 9600 4800 2400bps selectable with setting mode Transmission Format Data length 8bit 7bit selectable with setting mode 4 Parity Not available Odd number Even number selectable with setting mode Stop bit 1bit fixed Communication method Half duplex When using as a...

Page 81: ...itor is available for download from our website 2 When battery power is reduced E is blinking Replace battery according to the procedures 3 Battery life will be shorten if using this under high temperature 9 5 2 Simple Demand Demand span 30 minutes span fix Span system synchronized with the main unit clock Data update cycle 1 minute Measurement item Present demand update every 1 second Estimated d...

Page 82: ... to change each setting each setting value is memorized to internal EEP ROM at the same time Therefore change setting frequently makes EEP ROM s life short Avoid to usage like this Especially be careful if you set by communication 9 8 Applicable standard Safety standard EN61010 1 EMC EMI EN61326 1 Radiation interference field strength Noise terminal voltage CISPR11 class A CISPR11 class A EMS EN61...

Page 83: ...pprox 90g Approx 200g Approx 295g Approx 450g Through type Model No AKW4506B AKW4507B AKW4508B Primary side rated current 50A 100A 250A 400A 600A Secondary side rated Current 16 7mA 33 3mA 125mA 200mA 200mA Transform ratio 3000 1 2000 1 3000 1 Ratio error 1 0 F S Hole Dia mm φ17 φ36 Breakdown voltage initial AC1000V 1min Between through hole and output lead wire AC2000V 1min Between through hole a...

Page 84: ...KW8M Eco POWER METER 75 Chapter 10 Mounting 10 1 Dimensions 10 1 1 Main unit Unit mm Clearance 1 0 ...

Page 85: ... mounting n numbers of mounting units 10 3 Panel mounting 1 Insert a unit from the front of the panel 2 Attach the mounting bracket by the holes at the top and bottom of case and secure in place with screws Fastening torque approx 0 12N m Panel thickness 1 to 15mm ...

Page 86: ...of data resistor for AKW8111H May 2011 ARCT1F440E 4 5th edition Add functions Current alarm and stand by alarm Pre scale setting Counter display is changed Add transmission speed 38400pbs Change response time to 1 to 99ms Correct the error of wiring diagrams January 2012 ARCT1F440E 5 6th edition Add functions Simple demand function 600ACT input Through type CT Improve spec Improve the accuracy Mar...

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