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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.

①

Commands

Computer

Eco-POWER

METER

②

Responses

◆

Command and response formats

Command message

(Host computer)

Header

Des-

tination

Text

Check

code

Termi-

nator

(To next command)

(Eco-POWER METER)

Header

Source

Text

Check

code

Termi-

nator

Normal response message

◇

Control codes

Name Character

ASCII

code

Explanation

Header

％

25H

Indicates the beginning of a message.

Command

＃

23H

Indicates that the data comprises a command
message.

Normal

response

＄

24H

Indicates that the data comprises a normal response
message.

Error

response

！

21H

Indicates that the data comprises a response message
when an error occurs.

Terminator

CR

0DH

Indicates the end of a message.

◇

Destination and 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 (ASCII codes)
These are codes (horizontal parity) that are used to detect errors in the transmitted data.
If “

**

” is entered instead of “Bcc”, however, messages can be transmitted without the Bcc. In this case,

the Bcc is included with the response

◇

Error code Err (H), (L)

Two- digit hexadecimal 00 to FF (ASCII codes)
These indicate the contents if an error occurs.

◆

Bcc

（

Block Check Code

）

-The Bcc is a code that carries out an error check using horizontal parity, to improve the reliability of

the data being sent.

-The Bcc uses an exclusive OR from the header (%) to the final character of the text, and converts the

8- bit data into a 2-character ASCII code.

Example)

％

0 1

＃

R T

0 1 CR

↑

↑

↑

↑

↑

Header

Station

No.1

Command

RT

Command

2-character

Bcc

％

0

1

#

R

T

0 1

25H

30H

31H 23H 52H

54H

Bcc(H)=0(30H)

Bcc(L)=1(31H)

①

Takes exclusive OR

②

Converts to ASCII format

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Содержание KW4M

Страница 1: ......

Страница 2: ...n the 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 secu...

Страница 3: ...ction Thank you for indeed for purchasing KW4M Eco POWER METER for this time In this manual we explain the usage of KW4M Eco POWER METER in detail Please use it correctly after understanding the content enough ...

Страница 4: ... Operation mode 8 4 3 2 Change the Preset Value 8 Chapter 5 Settings 9 5 1 Operation procedure 9 5 2 Setting Mode Explanation 10 5 2 1 MODE Select input method 10 5 2 2 MODE1 10 5 2 3 MODE2 13 5 2 4 MODE3 14 5 2 5 MODE4 15 Chapter 6 Installation and Wiring 16 6 1 Panel Cut out dimensions 16 6 2 Panel mounting diagram 16 6 3 Wiring 17 6 3 1 Terminal arrangement 17 6 3 2 Power measurement 17 6 3 3 P...

Страница 5: ...34 8 2 2 Pulse input specifications 35 8 3 Pulse output Transistor output Specifications 35 8 4 Communication Specifications 36 8 5 Dedicated Current Transformer Specifications 36 8 6 Self diagnostic function 37 Chapter 9 Dimensions 37 9 1 Main unit 37 9 2 Dedicated CT 37 9 2 Dedicated CT 38 ...

Страница 6: ...ide circuit of inverter 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 the power supply line incorrect measurements may result Eco POWER METER is designed to be used in a control panel As to measurement If there is ...

Страница 7: ...MEWTOCOL AKW5211 Single phase two wire Single phase three wire Three phase three wire 100 240V AC 100 120 200 240V AC 100 120V AC 200 240V AC 5A 50A 100A 250A 400A Dedicated CT type 5A 50A 100A 250A 400A 11 pin MODBUS RTU AKW5212 1 2 2 Dedicated Current Transformer CT Rated primary current Model No 5A 50A AKW4801 100A AKW4802 250A AKW4803 400A AKW4804 1 2 3 Options Product name Contents Model No M...

Страница 8: ...000 0 Voltage between 1 2 V 0 0 to 9999 9 Voltage Voltage between 2 3 V 0 0 to 9999 9 Yen JPY 0 to 999999 Dollars 0 0 to 99999 9 Euros EUR 0 0 to 99999 9 Yuan CNY 0 to 999999 Electricity charge No currency CHG 0 to 999999 Corresponding value Carbon dioxide kg CO2 0 0 to 999999 ON time h Hour 0 0 to 99999 9 Hour meter OFF time h Hour 0 0 to 99999 9 Pulse input Count 0 to 999999 Eco POWER METER is d...

Страница 9: ...hange which value is displayed b Make settings in a particular mode 2 2 Select Keys Functions POWER measurement PULSE measurement kW kWh Instantaneous electric power Integrated electrical energy Continuous press Display by 9 digit Integrated electric power A L1 CT1 phase current L2 CT2 phase current V Voltage between 1 and 2 Between 2 and 3 CHARGE Electricity charge Corresponding value JPY EUR CNY...

Страница 10: ...ing the full scale 99999 9kWh the value reverts to 0 00kWh but continues to measure How to display with 9 digit Integrated electrical energy can be displayed with 9 digit Continuous press kW kWh for about 2sec or more at the instantaneous electric power or integrated electrical energy display kWh shows for about 0 5sec and integrated electrical energy with 9 digit is displayed Integrated electrica...

Страница 11: ...hree phase three wire 1 R phase current 3 T phase current 3 3 Voltage Press V key to display the voltage value of the load Press V key to change voltage between 1 and 2 V to 2 and 3 V Displayed data is updated at every 1 second Voltage between 1 and 2 V Voltage between 2 and 3 V Sample display of 238 8V Sample display of 238 6V When input voltage exceeds 150 F S at each range will be displayed in ...

Страница 12: ...the load ON time or load OFF time measured by CT1 Press TIME key to change the load ON time to load OFF time ON time h OFF time h Sample of ON time 100 0 h Sample of OFF time 100 0 h When load current is under the setting current for time measurement HM A it measures as OFF time When load current is exceeded to the setting current for time measurement HM A it measures as ON time Current for time m...

Страница 13: ...ue COUNT Preset value COUNT Sample of count value 10000 Sample of preset value 10000 How to Enter the Preset Value Press COUNT continuously for about 3sec at preset value display PSET is blinking Enter a preset value using kW kWh A V CHARGE TIME and COUNT Press SET to set the entered value PSET stops blinking Position of Decimal Point The position of decimal point for count value and preset value ...

Страница 14: ... 2 3 n 2 n 1 n n 1 n 2 n 3 n Preset value 1 Output control is maintained after count up completion and until reset However counting is possible despite of count up completion 2 It reverts 0 after counting up full scale but output control is maintained However output is OFF if count value or preset value is changed 4 3 2 Change the Preset Value It is possible to change the preset value even during ...

Страница 15: ...o off setting mode O F F SET SET SET SET Primary side current of CT setting mode C T 1 3 Pre scale setting mode P S C L Transmission speed setting mode S P SET SET SET VT ratio setting mode V T Unit setting mode U N I T Transmission format setting mode F T SET SET SET Current for time measurement setting mode H A Response time setting mode R E S P SET キー SET Cutoff current setting mode C U T A SET...

Страница 16: ...mary current when measuring by combination with existing CT its secondary current of 5A It is possible to use as the second step for combination with existing CT by selecting 5A in the CT type setting mode In this case it is necessary to set the primary side current It can be set the range of 1 to 4000 When connecting 5ACT directly and measure with 5A range set to 5 ex If measured CT is 400A 5A se...

Страница 17: ...cted on unit for pulse output setting mode Electricity charge setting mode PY E U R C N Y C H G C O 2 Mode defines electricity charge ratio and conversion factor used as a standard per 1kWh The electricity charge ration of 5 kinds of currency JPY EUR CNY CHG and CO2 conversion factor can be set It can be set the range of 0 0 to 99 9 yen 1kWh Initial 10 0 It can be set the range of 0 000 to 9 999 d...

Страница 18: ...W kWh A V If you don t measure the current under 10 0 F S set to 10 0 1 0 50 0 SET Unit for pulse output setting mode Factory setting Display Press kW kWh to change unit for pulse output Unit is selected from 0 001 0 01 0 1 1 10 100 ALARM SET Alarm value setting mode Factory setting Display Enter power for alarm using kW kWh A V CHARGE TIME COUNT It is only when ALARM is selected on unit for pulse...

Страница 19: ... setting mode U N I T Mode defines unit used for count value display Select from CNT l kl m3 Set CNT l kl m3 Display C N T k m 3 Count value does not change even if the unit setting is changed during counting Normal display MODE MODE display A Max counting speed setting mode Factory setting Display Press kW kWh to change max counting speed Max counting speed is selected from 2000 2kHz 30 30Hz SET ...

Страница 20: ...it o 8bit n 8bit E for MODBUS type n none means parity is not available E Even means parity is even number o odd means parity is odd number Response time setting mode R E S P MODE defines serial communication RS485 response time of main unit When command is received it sends response after setting response time passes It can be set the range of 5 to 99ms Normal display MODE MODE display V Station ...

Страница 21: ...time can be set the range of 0 to 99min 0 should be set if you want to turn always light on 1 99 should be set if you want to turn light off at setting time After turns off the backlight any key operation makes it turns on Normal display MODE MODE display CHARGE Auto off setting mode Factory setting Display Enter auto off time by minute using kW kWh A Auto off time can be entered the range of 0 to...

Страница 22: ...n so that the gap between the mounting frame and the panel surface is minimized Tighten the screws 2 places equally tight and check that there is no rattling If the screws are overly tightened the frame may come off In that case loosen the screws and tighten them again pushing the frame in Dimension A when u products are mounted in a row A 48 n 2 5 If the products are mounted in a row they lose th...

Страница 23: ...e Pin type Single phase two wire Screw terminal type 100 120 200 240VAC 100 120 200 240V Pin type Single phase three wire Screw terminal type 100 120VAC 100 120V 3W Pin type Three phase three wire Screw terminal type 200 240VAC 200 240V 3 6 3 2 Power measurement Main unit wiring diagrams Please connect a breaker to the voltage input part for safety reasons and to protect the device Grounding CT s ...

Страница 24: ...system VT Voltage transformer is needed when you measure a load with voltage over 200V system Use commercial VT those secondary rating is 110V Grounding CT s secondary side l line and VT s neutral line is recommended for the unit protection when CT or VT breaks down Single phase 2 wire system Pin type Screw terminal type Single phase 3 wire system Three phase 3 wire system Pin type Screw terminal ...

Страница 25: ...de to the terminal of the main unit first and after that wire the primary side to a load electric wire The CT has polarity Wire correctly according to the K and L marks For the dedicated CT AKW4801 4802 4803 4804 k is the white wire and l is the black wire Check beforehand that the thickness of the electric wire is smaller than the through hole of the CT If you use a CT that separates at the botto...

Страница 26: ...e should be more than 100kΩ Input wiring Please wire as short as possible by using a shielded wire or a metallic electric wire tube individually Caution The AC power supply input part is not insulated to pulse input parts So the input equipment must have the power supply transformer in which the secondary side is not grounded with the primary and secondary sides insulated in order to prevent inter...

Страница 27: ...ot share a ground with other earth lines Fig 1 Change the slide switch on the side of main unit as a terminal station Fig 2 Be sure to connect with daisy chain the RS 485 transmission line between each unit Do not use a splitter Fig 3 6 6mm or less 3 7ｍｍ Sheilded cable To RS 485 device Sheilded cable Eco POWER METER General station Eco POWER METER Terminal station Class D grounding Class D groundi...

Страница 28: ...owing conditions 1 Pulse output 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 and reinforced double insulation with communication system side 2 Provide the voltage input part with an EN60947 1 or EN60947 3 compliant circuit breaker The breaker that connects to the voltage input part...

Страница 29: ...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 RS 485 Eco POWER METER Slave side When Eco POWER METER Slave starts transmission to RS 485 communication line it is arranged so as to provide an idle status transmission period of about 5 to 99ms setting available b...

Страница 30: ... 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 ASCII codes T...

Страница 31: ...s electric power 0 01kW Sign less 32bit 0 to 9999 99 R W DT00066 VT ratio 0 01 Sign less 16bit 1 00 to 99 99 R W DT00067 Threshold value current for time measurement 0 1 Sign less 16bit 1 0 to 100 0 R W DT00068 Cutoff current 0 1 Sign less 16bit 1 0 to 50 0 R W DT00150 DT00151 Load ON time 0 1h Sign less 32bit 0 to 99999 9 R W DT00152 DT00153 Load OFF time 0 1h Sign less 32bit 0 to 99999 9 R W DT0...

Страница 32: ...not D 61H Data error Word No was specified without decimal 0000F etc The starting word No is bigger than the ending word No Writing data has a code that is not hexadecimal 62H Registration error Too many registrations have been entered more than 17 MD command was sent when some registration has been exist MG command was sent when registration has not been entered Self diagnostic error Error code E...

Страница 33: ...gister Data specification Data specification 101 100 M D D 104 103 102 101 100 D 104 103 102 101 100 161 160 CR Command Register reset 101 100 M D F F F F F F 161 160 CR Normal response Registration successful 101 100 M D 161 160 CR MG Monitoring start Monitors a registered data Command 101 100 M G 161 160 CR Normal response Monitoring successful 101 100 M G 0 0 0 161 160 161 160 163 162 161 160 1...

Страница 34: ...dress 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 negative acknowledgemen...

Страница 35: ...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 order to ...

Страница 36: ...haracters 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 device numbers is returned as contents of error Mistaken message example Command 3 5 idle characters Slave address 01H Function code 10H Num...

Страница 37: ...1A Sign less 16bit 0H 270FH 0 9999 03H 06H 10H 003CH DT00060 CT type Rated A rms Sign less 16bit 5 types 5H 5 32H 50 64H 100 FAH 250 190H 400 003DH DT00061 03H 06H 10H 003EH DT00062 Unit for Pulse output Sign less 32bit 1H 1 0 001 AH 10 0 01 64H 100 0 1 3E8H 1000 1 2710H 10000 10 186A0H 100000 100 3E7H 999 Instantaneous electric power Values of 0040H 0041H 03H 06H 10H 003FH DT00063 Primary side cu...

Страница 38: ...00164 Display unit Sign less 16bit 0H 0 CNT 1H 1 l 2H 2 kl 3H 3 m3 00AAH DT00170 03H 00ABH DT00171 Voltage L1V Between 1 and 2 0 1V Sign less 32bit 0H 1869FH 0 99999 00ACH DT00172 03H 00ADH DT00173 Voltage L2V Between 2 and 3 0 1V Sign less 32bit 0H 1869FH 0 99999 00B0H DT00176 03H 00B1H DT00177 Instantaneous power 0 01kW Sign less 32bit 0H F423FH 0 999999 note 1 03H Read 06H 10H Write note 2 Data...

Страница 39: ...d circuit Between Power terminal 1 R 2 N S 3 T CT input terminal CT1 CT2 CT1 2 RS 485 terminal Pulse output terminal Outer edge case all terminals Use ad a Pulse counter Insulated circuit Between Power terminal 1 R 2 N Pulse input terminal CT1 0V RS 485 terminal Pulse output terminal Outer edge case all terminals Vibration resistance 10 to 55Hz 1cycle min single amplitude 0 75mm 1h on 3 axes Shock...

Страница 40: ... voltage over 200V system Secondary current rating of commercial VT is 110V Input voltage Max measured voltage 9999 9V Primary side rating In case using dedicated CT 5A 50A 100A 250A 400A Select with setting mode In case using 5A CT with secondary rating 5A 1 4000A Set with setting mode Use a commercial CT with secondary side current of 5A when measuring 400A or more Accuracy coverage 10 100 of ra...

Страница 41: ...Max 2V Impedance when open 100kΩ Output mode HOLD Over count Number of Digit 6 digit 0 to 999999 Selectable with setting mode Decimal point Set to 3rd decimal places Auto setting Range 0 001 100 000 Selectable with setting mode Pre scale setting Unit CNT l kl m3 Selectable with setting mode Count value does not change even if the unit setting is changed during counting 8 3 Pulse output Transistor ...

Страница 42: ...d current 5A 50A 100A 250A 400A Rated secondary side current 1 67mA 16 7mA 33 3mA 125mA 200mA Winding Turn 3000 3000 2000 2000 Ratio error 2 0 F S Hole Dia mm φ10 φ16 φ24 φ36 Breakdown voltage initial AC1000V 1min Between through hole and output lead wire AC2000V 1min Between through hole and output lead wire Insulation resistance initial Min 100MΩ at DC500V Between through hole and output lead wi...

Страница 43: ...ing Output status To recover Err 00 CPU error Turn the power off and then on again Err 01 Memory error OFF EEP ROM life ended Replace the unit Includes the possibility that the EEP ROM s life has expired Chapter 9 Dimensions 9 1 Main unit Unit mm Clearance 1 0 Screw terminal type AKW5111 Pin type AKW5211 ...

Страница 44: ...38 9 2 Dedicated CT Unit mm Clearance 1 0 For 5A 50A AKW4801 For 100A AKW4802 Attached trunk cable L 1000 ...

Страница 45: ...39 For 250A AKW4803 For 400A AKW4804 ...

Страница 46: ...anation in detail March 2008 ARCT1F413E 2 Third edition MODBUS type series addition Model No MODBUS communication MODBUS specifications October 2008 ARCT1F413E 3 Fourth edition Change company name New function addition Display of charge CHG and CO2 Transmission speed 38400bps Optional parts addition AKW4822 Installation frame AKW4823 Terminal protective cover ...

Страница 47: ......

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