Panasonic KW4M User manual

Cautions for Your Safety
Read the manual carefully before installing, running and maintenance for proper operation.
Before using, master the knowledge of the equipment, safety information and all of other
notes.
This manual uses two safety flags to indicate different levels of danger.
WARNING A handling error could cause serious physical injury to an operator
and in the worst case could even be fatal.
●Always take precautions to ensure the overall safety of your system, so that the whole
system remains safe in the event of failure of this product or other external factor.
●Do not use this product in areas with inflammable gas. It could lead to an explosion.
●Exposing this product to excessive heat or open flames could cause damage to the
lithium battery or other electronic parts.
CAUTION A handling error could cause serious physical injury to an operator
or damage to the equipment.
●To prevent abnormal exothermic heat or smoke generation, use this product at the
values less than 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 securely. The loose connection might cause abnormal
exothermic heat or smoke generation.
●Do not allow foreign matters such as liquid, flammable materials, metals to go into the
inside of the product. It might cause exothermic heat or smoke generation.
●Do not undertake construction (such as connection and disconnection) while the power
supply is on.
●Do not use at secondary side circuit of inverter. It might cause exothermic heat or
damage. Copyright and trademark
● Panasonic Electric Works 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.
●Other company names and the product names are the trademarks or registered
trademarks of each company.

Introduction
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.

TableofContents
Cautions before using ............................................................................................................................ⅰ
Chapter 1 Unit’s Features and Structure..............................................................................................1
1-1 Features................................................................................................................................................... 1
1-2 Unit’s Name and Part Numbers............................................................................................................... 1
1-2-1 Main unit......................................................................................................................................... 1
1-2-2 Dedicated Current Transformer (CT)............................................................................................. 1
1-2-3 Options........................................................................................................................................... 1
1-3 Measurement items................................................................................................................................. 2
Chapter 2 Parts Name and Working ....................................................................................................3
2-1 Parts Names............................................................................................................................................ 3
2-2 Select Keys’ Functions ............................................................................................................................ 3
Chapter 3 Display of each Value..........................................................................................................4
3-1 Instantaneous electric power / Integrated Electrical energy.................................................................... 4
3-2 Current..................................................................................................................................................... 5
3-3 Voltage..................................................................................................................................................... 5
3-4 Electricity Charge..................................................................................................................................... 6
3-5 Hour Meter............................................................................................................................................... 6
3-6 Count Value / Preset Value..................................................................................................................... 7
Chapter 4 Various Functions................................................................................................................8
4-1 LOCK mode............................................................................................................................................. 8
4-2 CT Direction Notification (POWER Measurement).................................................................................. 8
4-3 Counter function (PULSE measurement)................................................................................................ 8
4-3-1 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 Pulse measurement..................................................................................................................... 20
6-3-4 For Output connection ................................................................................................................. 21
6-3-5 For Wiring terminal....................................................................................................................... 21
6-3-6 RS-485 communication................................................................................................................ 21
6-3-7 Low Voltage Directive.................................................................................................................. 22
Chapter 7 Communications....................................................................................................................23
7-1 Communication Procedures.................................................................................................................. 23
7-2 Communication timing........................................................................................................................... 23
7-3 MEWTOCOL communication................................................................................................................ 24
7-3-1 Overview of MEWTOCOL-COM (RS-485) .................................................................................. 24
7-3-2 Data Register List ........................................................................................................................ 25
7-3-3 Error Codes.................................................................................................................................. 26
7-3-4 Command..................................................................................................................................... 26
7-5 MODBUS (RTU) Communication.......................................................................................................... 28
7-5-1 Overview of MODBUS (RTU) ...................................................................................................... 28
7-4-2 Data Register List ........................................................................................................................ 31

Chapter 8 Specifications......................................................................................................................33
8-1 Main unit................................................................................................................................................ 33
8-2 Input Specifications ............................................................................................................................... 34
8-2-1 Power Input.................................................................................................................................. 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

i
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
・Where the unit will be exposed to water, oil or chemicals
・Where organic solvents such as benzene, paint thinner, alcohol, or strong alkaline solutions
such as ammonia or caustic soda might adhere to the product
・Where direct vibration or shock might be transmitted to the product, and where water might wet
the product
◇Please use the Unit according to the specifications described in this manual. Otherwise, it
may malfunction or cause fire and an electric shock.
・Connect to the power supply in compliance with the rating.
・Refer to the wiring diagram to ensure proper wiring for the 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.
・Do not add voltage and current to an output terminal from outside.
・Do not use at secondary side 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 some distortion by harmonic or waveform, it may not measure correctly.
Please check with the actual system before adopting it.
■Static electricity
・Discharge static electricity touching the grounded metal etc. when you touch the unit.
・Excessive static electricity might be generated especially in a dry place.
■Cleaning
・Wipe dirt of the main unit with soft cloth etc. When thinner is used, the unit might deform or be
discolored.
■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.
■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 surely.
・Use an electric wire applicable to the rated current.

1
Chapter 1 Unit’s Features and Structure
1-1 Features
■KW4M Eco-POWER METER is a wattmeter in DIN48 size. Electrical energy (voltage, current, etc.) is
measured using AC voltage and AC current input via one of the following systems: single-phase
two-wire system, single-phase three-wire system, or three-phase three-wire system.
This also works as an hour meter, that is measured power-on or power-off time, and as a counter that
is for pulse output equipment like flowmeter.
■Eco-POWER METER is designed chiefly to manage saving energy. It is neither intended nor
can it be legally used for billing.
1-2 Unit’s Name and Part Numbers
1-2-1 Main unit
Phase and
Wire system Power Supply
Measured
voltage input Measured
current
input
Current
transformer
Terminal
type
Protocol Model No
MEWTOCOL AKW5111
Screw
terminal MODBUS
(RTU) AKW5112
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
Mounting frame Used for mounting in a panel (supplied with a unit) AT8-DA4
Rubber gasket Used for mounting in a panel (supplied with a unit) ATC18002
Protective cover Used for protecting a front display
(common to Timer/Counter) AQM4803
DIN rail socket For 11-pin type(surface mounting) ATC180041
Rear terminal socket For 11-pin type (embedded mounting) AT78051
11P cap For 11-pin type (connectable directly with soldering) AT8-DP11
Mounting rail DIN rail terminal socket fixing rail AT8-DLA1
Installation frame Used for mounting AKW4822
Terminal
Protective cover Used to cover a terminal block (only for screw terminal type) AKW4823

2
1-3 Measurement items
Item Unit Data displayed range
Instantaneous electric power kW 0.00 to 9999.99
0.00 to 9999.99kWh to 10.00MWh to
9999.99MWh
Integrated electrical energy kWh
MWh 9-digit display: 0.00 to 9999999.99 kWh
L1（CT1）-phase current A 0.0 to 6000.0
Current L2（CT2）-phase current A 0.0 to 6000.0
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-CO20.0 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 designed chiefly to manage saving energy.
It is neither intended nor can it be legally used for billing.

3
Chapter 2 Parts Name and Working
2-1 Parts Names
①Mode name display (16-segment)
②Lock indicator Light is on when locked.
③Mode indicator Light is on when the mode is being set.
④Output indicator Light is on when pulse is output.
⑤CT direction notification Light is on when CT is connected
correctly and current flows.
⑥Display for value selected (7-segment)
Instantaneous electric power,
Integrated electrical energy,
Current, Voltage, Electricity charge, Hour meter and Counter
⑦MODE key Use to select mode
⑧SET key Use to set each value entered
⑨Select keys a) Change 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 →CHG
→CO2
<TIME> ON-time →OFF-time
---
<COUNT> --- ・Count value →Preset value
・(Continuous press at preset value display)
Shift to preset value setting mode
<MODE>+<SET> Reset (Integrated electrical energy,
ON-time,OFF-time) Reset (Count value)
<MODE> Shift to each setting mode
<SET> ・Set each value entered
・(Continuous press) All keys locked. While in LOCK mode, releases LOCK mode
②
③
⑤
⑦
⑧
④
①
⑥
⑨

4
Chapter 3 Display of each Value
3-1 Instantaneous electric power / Integrated Electrical energy
・Press <kW/kWh>key to display the instantaneous electric power and integrated electrical energy.
・Press <kW/kWh>key to change the instantaneous electric power to integrated electrical energy.
*Displayed data is updated at every 1 second.
Instantaneous electric power(kW) →Integrated electrical energy(kWh)
Sample of 13.86kW Sample of 123.00kWh
・Integrated electrical energy is measured and displayed from 0.00kWh to 9999.99MWh.
・The decimal point and the unit are changed automatically.
(After reaching 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 electrical energy Instantaneous electric power
9-digit(kWh) (kW)
Sample of 1234567.89kWh Sample of 13.86kW
How to reset the integrated electrical energy
・Press <MODE>key while pressing <SET>key makes integrated electrical energy clear.
Reset
ON
<SET> OFF
ON
<MODE> OFF
<kW/kWh>
kWh kWh kWh kWh MWh MWh
0.00 9999.99 10000.0 99999.9 100.00 9999.99
Shows for
about 0.5sec. <kW/kWh>
<kW/kWh> <kW/kWh>
<kW/kWh> <kW/kWh>

5
3-2 Current
・Press <A>key to display the current value of the load.
・Press <A>key to change L1(CT1)-phase current to L2(CT2)-phase current
*Displayed data is updated at every 1 second.
L1(CT1)-phase current (A) →L2(CT2)-phase current (A)
Sample of L1(CT1)-phase 30.0A Sample of L2(CT2)-phase 30.1A
・When input current exceeds 150%F.S. at each range, 「－ －－－－－」 will be displayed in
the lower line.
・Current measurement parts
Eco-POWER METER measures the current as below.
Display
System L1(CT1)A L2(CT2)A
Single-phase two-wire 1(L1)-phase current -
Single-phase three-wire 1(R)-phase current 3(T)-phase current
Three-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
the lower line.
・Voltage measurement parts
Eco-POWER METER measures the voltage as below.
Display
System L1V L2V
Single-phase two-wire Voltage between 1 and 2
（R-phase）－
Single-phase three-wire Voltage between 1 and 2
（R-phase）Voltage between 2 and 3
(T-phase)
Three-phase three-wire Voltage between 1 and 2
（Between R and S line）Voltage between 2 and 3
(Between S and T line)
<A>
<V>
< A > < A >
< V > < V >

6
3-4 Electricity Charge
It displays the standard electricity charge or corresponding value for the integrated electrical energy.
・Press <CHARGE>key to display the electricity charge and corresponding value.
・At electricity charge display, press <CHARGE>key to change between
JPY, $, EUR, CNY, CHG and CO2.
Yen →Dollars →Euros →Yuan
Sample of 123450 yen Sample of 12345.6 dollars Sample of 12345.6 euros Sample of 123456 yuan
Nocurrency →Carbon dioxide
Sample of 876543 Sample of 123456 kg-CO2
3-5 Hour Meter
・Press <TIME> key to display 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 measurement (HM-A) is set to under cutoff current （CUTA）,
all current is measured as OFF-time.
＊Current flow of CT1
Load ON-time
0 HM-A CUTA Ratio of load current [%] [h]
Measured as OFF-h Measured as ON-h
Blinking the decimal point
during measurement of
ON-time
<TIME>
Blinking the decimal
point during
measurement of
<TIME>
<CHARGE>
<TIME>

7
<COUNT> <COUNT>
＊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
・Press <MODE>key while pressing <SET>key makes ON / OFF-time clear.
Reset
ON
<SET> OFF
ON
<MODE> OFF
3-6 Count Value / Preset Value
It displays present count value (pulse input value) and preset value.
・Press <COUNT> key to display count value (pulse input value).
・Press <COUNT> key to change count value to preset value.
Count value(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 is decided according to the setting at
‘Pre-scale setting mode’.
Ex) When preset value set to 0.01, the decimal point is fixed the last 2 digit for count value and preset
value.
How to Reset Count value
・Press <MODE>key while pressing <SET>key makes count value clear.
Reset
ON
<SET> OFF
ON
<MODE> OFF
<COUNT>

8
Chapter4 VariousFunctions
4-1 LOCK mode
It is the mode makes <MODE>key and Select keys unable.
Use when you want to fix one of the measurement displays (For all
displays).
When you press <SET>key continuously for about 3sec., the “LOCK”
indicator lights and <MODE>key and Select keys become locked (pressing
them will have no effect).
Press <SET>key continuously for about 3sec. again to release Lock mode.
The “LOCK” indicator goes off and the lock mode is released (unlocked)
4-2 CT Direction Notification (POWER Measurement)
This shows the connection condition of CT and notices wrong voltage or
wrong connection of CT wiring.
・“CT1(CT2)” lights if the input voltage is corresponding to the direction of
the current.
・“CT1” lights if the voltage between 1 and 2 is corresponding to the direction
of L1-phase current.
・“CT2” lights if the voltage between 2 and 3 is corresponding to the direction
of L2-phase current.
＊It does not light if the load current is under the cutoff current (CUTA) or if
there is some distortion by harmonic or waveform.
4-3 Counter function (PULSE measurement)
4-3-1 Operation mode
Maintain output hold count HOLD
[Output] OFF ON
[Counting] possible
[Addition] 0 1 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 counting. However note the following points.
◇When the pre-scale value is “1.000”.（PSCL=1.000）
(1) If the preset 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 is fixed, output is changed according to the changing of preset value as
below.
①If the preset value is changed to the value less than the count value or same as count value,
output is ON.
（Count value ≧Preset value）
②If the preset value is changed to the value more than the count value, output is OFF.
（Count value ＜Preset value）
◇When the pre-scale is not “1.000”. （PSCL≠1.000）
Even if the preset value is changed after counting to full scale, output is not changed.

9
Chapter 5 Settings
5-1 Operation procedure
Each setting is classified as follows. There are the detailed explanations from next pages.
・MODE:<MODE>
…Mode for selection of Power measurement (Power meter) or Pulse measurement (Pulse counter).
・MODE1: <MODE>+<kW/kWh> …Mode for setting each parameter for power measurement.
・MODE2: <MODE>+<A> …Mode for setting of each parameter for pulse measurement
・MODE3: <MODE>+<V> …Mode for setting of each parameter for serial communication (RS-485)
・MODE4: <MODE>+<CHARGE> …Mode for setting of each parameter for optional function
Normal Display
<MODE> <MODE> Continuous press (MODE)
about 3sec.
OE <SET> Input method setting mode
I N
(MODE 1)＊1 (MODE 2)＊2 (MODE 3) (MODE 4)
<kW/kWh> <A> <V> <CHARGE>
CT type setting mode
C T - T Max.measurement speed
setting mode
H z Station number setting
mode
N O . Auto-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>
Unit for pulse output
setting mode
P L-P
<SET>
Alarm value setting mode
A L-P ＊4
<SET>
Note)
Press <MODE>to
return normal display.
Electricity rate setting mode
P Y/ $ /E U R / C N Y/C H G / C O 2
<SET> Normal display
＊1 MODE1 is only for POWER measurement.
＊2 MODE2 is only for PULSE measurement.
＊3 Primary side current of CT setting mode is only for when ‘5A’ is selected on CT type setting mode.
＊4 Alarm value setting mode is only for when ‘ALARM’ is selected on Unit for pulse output setting mode.
NOTE）Power measurement (Power meter) and Pulse measurement (Pulse counter) can not
be used at the same time.

10
<MODE>
<MODE>
5-2 Setting Mode Explanation
■The value with under line is initial setting among each setting value. ☆Set before measurement.
5-2-1 MODE (Select input method)
＜MODE＞
Input method setting mode IN
Mode defines input method, power measurement or pulse measurement.
・Select from POWER / COUNT
・“POWER” is selected when using power measurement (Power meter).
・“COUNT” is selected when using pulse measurement (Pulse counter).
Normal display
↓ <MODE>
Input method setting mode Display
・ Press <MODE> continuously about 3s.
to shift to this mode.
・ Select POWER (Power measurement)
→COUNT (Pulse measurement) using
<MODE>.
↓ <SET>
Normal display
5-2-2MODE1
(Mode for setting each parameter for power measurement.
This mode doesn’t show when pulse measurement is selected.)
＜MODE＞+＜kW/kWh＞
CT type setting mode CT-T
Mode defines input current type of the dedicated CT.
・Select from the type of 5A/50A/100A/250A/400A.
・When the secondary current of CT is 5A, select “5A”.
Primary side current of CT setting mode CT-1
Mode defines primary 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, set to “400”.
※This mode is only when “5A” is selected on CT type setting mode.
VT ratio setting mode VT
Mode defines voltage-input method to the main unit, input voltage directly or uses a voltage
transformer (VT) (over 240VAC).
・It can be set the range of 1.00 to 99.99.
“1.00” should be set when voltage input directly without connecting VT.
“1.01～99.99” should be set when VT is used to input voltage.
ex) If the VT is 440V/110V, set to “4.00”.
Current for time measurement setting mode H-A
Mode defines for time measured current. Unit measures ON-time and OFF-time by setting value.
・It can be set the range of 1.0% to 100.0%F.S.
ex) When 10.0 is set, the current exceeds 10.0%F.S is measured as ON-time, the current under
10.0%F.S is measured as OFF-time.
※Measured current is the current of L1(CT1)-phase.
<MODE>

11
Cutoff current setting mode CUTA
Mode defines load current that does not measured (Cutoff current).
Use to avoid miss-measurement by wiring or induction noise at no-load.
0.00kW is displayed for instantaneous electric power, 0.0A is displayed for current. Integrated
electrical energy is not measured.
・It can be set the range of 1.0% to 50.0%.
ex) When set to 10.0, current under 10.0%F.S is not measured.
Unit for pulse output setting mode (Power) PL-P
Mode defines unit used for pulse output.
・Select from 0.001/0.01/0.1/1/10/100kWh /Alarm.
When “ALARM” is set, alarm is output at the time when instantaneous electric power is over the
setting value.
When one of the “0.001/0.01/0.1/1/10/100”[kWh] is set, one pulse is output at the setting value.
Alarm value setting mode AL-P
Mode defines instantaneous electric power used for alarm output.
・It is set the range of 0.00 to 9999.99kW.
※This mode is only when “ALARM” is selected on unit for pulse output setting mode.
Electricity charge setting mode PY/$/EUR/CNY/CHG/CO2
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 CO2conversion
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 dollars/1kWh. (Initial 0.093)
・It can be set the range of 0.000 to 9.999 euros/1kWh. (Initial 0.085)
・It can be set the range of 0.00 to 99.99 yuan/1kWh. (Initial 10.00）
・It can be set the range of 0.00 to 99.99 /1kWh. (Initial 10.00）
・CO2conversion factor can be set the range of 0.000 to 9.999 kg-CO2/1kWh. (Initial 0.410）
Normal display
↓ <MODE>
MODE display
↓ <kW/kWh>
CT type setting mode Factory setting / Display
・ Press <kW/kWh> to change CT type.
・ CT type is selected from 50→100→250→400→5
↓ <SET>
Primary side current of CT setting mode Factory setting / Display
・ Enter primary side current of CT using
<kW/kWh>,< A >, < V >.
・ If measured CT is 100A/5A, set to 100.
・ If 5A is measured, set to 5.
It is only when “5A” is selected on CT type setting mode.
↓ <SET>

12
VT ratio setting mode Factory setting / Display
・Enter VT ratio using<kW/kWh>,< A >,< V >,<CHARGE>.
・ If the VT is 440/110, set to “4.00”.
（1.00～99.99）
↓ <SET>
Current for time measurement setting mode Factory setting / Display
・ Enter current for time measurement using
<kW/kWh>,< A >,< V >.
・ If you measure the current over 50.0%F.S, set to “50.0”.
（1.0～100.0）
↓ <SET>
Cutoff current setting mode Factory setting / Display
・ Enter cutoff current using <kW/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
output setting mode.
（0～9999.99kWh）
↓ <SET>
Electricity charge setting mode Factory setting / Display
・Press <COUNT> to change
JPY→＄→EUR→CNY→CHG→CO2.
・Enter the rate per 1kWh using
<kW/kWh>,< A >,< V >,<CHARGE>.
↓ <SET>
Normal display

13
5-2-3MODE2
(Mode for setting each parameter for pulse measurement.
This mode doesn’t show when power measurement is selected.)
＜MODE＞+＜A ＞
Max. counting speed setting mode Hz
Mode defines max. counting speed.
・Select from 2kHz/30Hz
Pre-scale setting mode PSCL
Mode defines pre-scale value used for change count value.
・It can be set the range of 0.001 to 100.000. (Initial 1.000）
・The position of decimal point set with this mode is applied 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.
Unit setting mode UNIT
Mode defines unit used for count value display.
・Select from CNT/l/kl/m3.
Set CNT l kl m3
Display CNT km3
※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>
Pre-scale setting mode Factory setting / Display
・ Enter pre-scale value using
<kW/kWh>,< A >,< V >,<CHARGE>,<TIME>,<COUNT>.
・ Pre-scale value can be entered the range of 0.001 to
100.000.
･The position of decimal point set with this mode is
applied to count value and preset value.
↓ <SET>
Unit setting mode Factory setting / Display
・ Press <kW/kWh> to change unit.
・ Unit is selected from CNT→l →kl→m3.
↓ <SET>
Normal display

14
5-2-4MODE3
（Mode for setting of each parameter for serial communication (RS-485)）
＜MODE＞+＜V ＞
Station number setting mode N O .
Mode defines an individual station no. for each unit when two or more units communicate via
serial communication (RS-485).
・It can be set the range of 01 to 99.
Transmission speed (Baud rate) setting mode S P 
Mode defines serial communication (RS-485) transmission speed. Define the transmission
speed according to the master’s (PLC etc.).
・Select from 38400/19200/9600/4800/2400【bit/s】.
Transmission format setting mode FT
Mode defines serial communication (RS-485) 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 for MEWTOCOL type.
8bit-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 number setting mode Factory setting / Display
・ Enter the station number using <kW/kWh>, < A >.
・Station number can be entered the range of 01 to 99.
↓ <SET>
Transmission speed setting mode Factory setting / Display
・ Press <kW/kWh> to change transmission speed.
・ Transmission speed is selected from
19200→9600→4800→2400→38400.
↓ <SET>
Transmission format setting mode Factory setting / Display
・ Press <kW/kWh> to change transmission format
(Data length / Parity).
・ Transmission format is selected from
8bit-o→7bit-n→7bit-E→7it-o→8bit-n→8bit-E.
・ n: not available E: even number o: odd number
↓ <SET>