MELSEC iQ-R Series Energy Measuring Module
User’ s Manual
RE81WH
Details
（
）
Mark
Meaning of the mark
Danger
Indicates that incorrect handling by ignoring this mark may result in death or severe
damage.
Title
Document number
IB63D82A
RE81WH
INTRODUCTION
(Read these precautions before using this product.)
This manual contains important instructions for MELSEC iQ-R series RE81W H.
Before using this module, please read this manual and the relevant manuals carefully and pay full attention to
safety to handle the product correctly.
The precautions given in this manual are concerned with this module only. For the safety precautions of the
programmable controller system, refer to the “MELSEC iQ-R Module Configuration Manual”.
Make sure that end users read this manual and then keep the manual in a safe place for future reference.
■Notations in this manual
Use the following marks in this manual.
injury.
Caution Indicates that incorrect handling by ignoring this mark may result in injury or property
Supplement Indicates precautions to avoid malfunction, to work the module properly.
Depending on circumstances, failure to follow the precautions given under “ Caution” may lead to further
serious consequences.
Please follow the precautions with full care because they are critical for personal and system safety.
The “n” used in this manual (for example: Xn0, Yn0, Un\G0, etc.) indicates the Start I/O No. of this module.
■Relevant manuals
The following manuals are also related to this module. You can download each manuals from the following
web site.
http://www.mitsubishielectric.com/fa/
MITSUBISHI Programmable Controller
MELSEC iQ-R Series Energy Measuring Module
Model RE81WH User’s Manual (Hardware)
MELSEC iQ-R Module Configuration Manual SH-081262ENG
GX Works3 Operating Manual SH-081215ENG
IB63D83
1
Energy Measuring Module (RE81WH) x1
User’s Manual (Hardware) x1
RE81WH
■Checking package contents
This following items for this device and included in package. Check that no items are missing.
This module is not compliant for dealing / proving electric energy specified in a measurement law. Please use
the certified watt-hour meter to be used for deal and proof of electric energy measurement stipulated.
When considering to use this module for an atomic power, aerospace, medical fields or passenger use mobile,
please contact to a sales representative beforehand.
2
RE81WH
FEATURES
(1) This Energy Measuring Module can measure various types of electric quantity just ONE module.
This Energy Measuring module can measure electric energy, reactive energy, current, voltage, electric
power, power factor, frequency, harmonic current and harmonic voltage.
Both consumption and regeneration of the electric energy can be measured.
(2) Extensive monitoring functions.
In addition to memorizing the maximum and minimum values, two types of alarm monitoring for upper
and lower limit can be performed.
Since the alarm setting is stored in the buffer memory, there is no need to complicated programs.
(3) It also can measure the electric energy for a certain period.
It can measure the electric energy for the duration of time for which the output device is on.
This feature enables to acquire the electric energy needed during device operation or energy per tact.
(4) It can acquire waveform data of current and voltage.
It can acquire waveform data of the measured current and voltage.
Thus, it is able to monitor / indicate using waveform data.
3
Revision data
Manual number *
Revision
Mar, 2018
IB63D82
First edition
Nov, 2018
IB63D82A
Modification, addition for the description of the version
Revision history
RE81WH
* Manual Number is provided at the bottom of the cover page.
■
related to RE81WH
Section 2.2, 6.4
■Modification for the errors and other description
Section 4.2, 5.1, 5.5 and 8.1
This manual does not guarantee to protect or does not give permission to any industrial property and any related rights.
Also, our company shall not be held any responsible for any issues related to industrial properties due to product usage
described in this manual.
© 2018 MITSUBISHI ELECTRIC CORPORATION
4
RE81WH
CONTENTS
INTRODUCTION ......................................................................................................................................... 1
FEATURES .............................................................................................................................................. 3
CONTENTS .............................................................................................................................................. 5
Section 1 SAFETY PRECAUTIONS ...................................................................................................... 7
1.1 Precautions for Operating Environment and Conditions .................................................................... 7
1.2 Matters concerning the preparation before use ................................................................................. 7
1.3 Installation and Wiring Precautions .................................................................................................... 8
1.4 Precautions for Start-up and Maintenance ....................................................................................... 10
1.5 Storage Precautions ......................................................................................................................... 10
1.6 Disposal Precautions ........................................................................................................................ 10
1.7 Packaging materials and this manual ............................................................................................... 10
Section 2 SYSTEM CONFIGURATION ................................................................................................ 11
2.1 Precautions for system configuration ............................................................................................... 11
2.2 Applicable system ............................................................................................................................. 11
Section 3 NAME AND FUNCTION OF EACH PART ............................................................................ 14
3.1 Name of each part ............................................................................................................................ 14
3.2 Indication and function of LEDs ........................................................................................................ 15
3.3 List of functions ................................................................................................................................. 16
3.4 Functions in detail ............................................................................................................................. 17
Section 4 I/O SIGNALS TO CPU MODULE ......................................................................................... 38
4.1 List of I/O signals .............................................................................................................................. 38
4.2 Details of I/O signals ......................................................................................................................... 39
Section 5 BUFFER MEMORY ............................................................................................................. 51
5.1 Buffer memory assignment .............................................................................................................. 51
5.2 Configurable sections (Un\G0 - Un\G99) ......................................................................................... 60
5.3 Measurement sections (Un\G100 - Un\G2999) ................................................................................ 70
5.4 Common sections (Un\G3000 - Un\G4999) ..................................................................................... 91
5.5 Waveform data sections (Un\G10000 - Un\G22013) ....................................................................... 94
Section 6 SETTING AND PROCEDURE FOR OPERATION ................................................................ 98
6.1 Procedure for operation .................................................................................................................... 98
6.2 Mounting and removing the module ................................................................................................. 99
6.3 Wiring.............................................................................................................................................. 101
6.4 Parameter setting ........................................................................................................................... 112
Section 7 PROGRAMMING ................................................................................................................ 126
7.1 Programming procedure ................................................................................................................. 126
7.2 System configuration and usage conditions for sample program .................................................. 127
7.3 Sample programming ..................................................................................................................... 129
Section 8 TROUBLESHOOTING ........................................................................................................ 135
8.1 List of error codes ........................................................................................................................... 135
8.2 Troubleshooting .............................................................................................................................. 137
8.3 Q&A ................................................................................................................................................ 140
5
RE81WH
Section 9 REQUIREMENT FOR THE COMPLIANCE WITH EMC
AND LOW VOLTAGE DIRECTIVES .................................................................................. 143
Section 10 SPECIFICATION ................................................................................................................ 144
10.1 General specifications .................................................................................................................... 144
10.2 Electrical and mechanical specifications ........................................................................................ 146
10.3 External dimensions ....................................................................................................................... 147
10.4 Optional devices ............................................................................................................................. 148
APPENDIX ........................................................................................................................................... 153
INDEX ........................................................................................................................................... 154
WARRANTY ........................................................................................................................................... 156
6
Section 1 SAFETY PRECAUTIONS
Places the ambient temperature exceeds the range 0 – 55ºC.
Places the relative humidity exceeds the range 5 – 95% or places with dewfall.
Places metal fragments or conductive substance are flying.
Dust, corrosive gas, saline and oil smoke exist.
Places in strong electromagnetic field or places large amounts of external noise exist.
Vibration and impact exceed the specifications.
RE81WH
Section 1 SAFETY PRECAUTIONS
1.1 Precautions for Operating Environment and Conditions
This module is premised on being used in pollution degree 2
degree, protect the module from the pollution on another device side to be incorporated.
Overvoltage category of measuring circuit in this module is CAT III
Do not use this product in the places listed below. Failure to follow the instruction may cause malfunctions and
a life decrease of product.
・
・Places the average daily temperature exceeds +35℃
・
・Altitude exceeds 2000 m.
・
・Places exposed to direct sunlight.
・
・Places exposed to rain or water drop.
・
・
・Installed places excluding the control panel.
This module is the open type device, which are designed to be housed within another device for prevention of
electric shock. House the module within the device such as the control panel before use. (Indoor use)
(Note 1) For the definition of the pollution degree and the over voltage category, refer to EN61010-1/2010.
1.2 Matters concerning the preparation before use
Use the module in the specified usage environment and conditions.
The setting of this module (phase wire system, primary voltage, primary current) is necessary before using it.
*Refer to "5.2 Configurable sections (Un\G0 - Un\G99)" about each setting method.
(Note1)
environment. When used in higher pollution
(Note 1)
.
Danger
● Do not write data into “System Area” in the buffer memory of the intelligent function module.
Also, do not output (turn ON) the “use prohibited” signal in the output signal sent from the sequencer
CPU to the intelligent function module.
Doing so may cause a malfunction to the sequencer system.
7
Section 1 SAFETY PRECAUTIONS
Use the programmable controller in an environment that meets the general specifications in the
RE81WH
1.3 Installation and Wiring Precautions
Make sure to use the module by following cautions of this section. Improper use may impair protection provided
by this module.
Danger
● Shut off the external power supply for the module in all phases before installing or wiring. Failure to do
so may cause an electric shock or a damage of the module.
● Shut off the power supply for the module in all phases before installing or wiring. Failure to do so may
cause an electric shock or a damage, a fire on the module.
Caution
＜Precautions for Electric work＞
● Any person who is involved in the installation and the wiring of this Programmable Controller should be
fully competent to do the work.
●
“MELSEC iQ-R Module Configuration Manual”. Failure to do so may result in electric shock, fire,
malfunction, or damage to or deterioration of the product.
● After mounting the module, ensure that the module fixing hook is securely applied on the base unit and
the module is surely mounted. Incorrect mounting may cause malfunctions, a failure or a drop of the
module. When using the Programmable Controller in an environment of frequent vibrations, fix the
module with a screw.
● Tighten the screw within the specified torque range. Loose tightening can cause drop of the screw, short
circuit or malfunction. Over tightening can damage the screw and/or module, resulting in drop, short
circuit, or malfunction.
● Do not directly touch any conductive part of the module. Doing so can cause malfunctions or a failure of
the module.
● Take care not entering any foreign objects such as strips and wire pieces into the module. It may cause
a fire, a failure or a malfunction.
● In order to prevent the module from incoming foreign objects such as wire pieces during wiring work, a
foreign-object preventive label is placed on the module. While a wiring work is performed, keep the label
on the module. Before operating the system, peel off the label for heat release. If the foreign-object
preventive label is not peeled off and the system is in use, residual heat inside the module may reduce
the product life.
● After inserting the electric wire or a bar terminal, make sure that no missing insertion is existing. Missing
insertion may cause a malfunction, a fire, or an electric shock on the device.
● Ensure the wiring to the module properly after checking the rated voltage and current of the product and
the terminal pin assignment. If the input voltage exceeds the rated voltage or the wiring is improper, it
may cause a fire or a breakage.
● The wires to be connected to the module shall be placed in a duct or fixed together by clamping. If the
electric wires are not placed in the duct or clamped together, loosen wires or their movement or careless
stretch may cause a breakage of the module or wire or a malfunction due to poor contact of electric wires.
● For protection against noise, transmission lines and input lines shall not be placed close to or bound
together with the power lines and high voltage lines. Keep distance as below between them. (Except for
the terminal block.)
Condition Distance
High-voltage line 600V or less 300mm or more
Other high-voltage line 600mm or more
8
Section 1 SAFETY PRECAUTIONS
Cover the dangerous voltage part of the module.
RE81WH
Caution
＜Connection of terminal block＞
● In case using stranded wire, take measures so that the filament should not vary by using a bar terminal
or by processing the point twisted. Use the bar terminal appropriated for the size of electric wires. If
inappropriate bar terminal is used, a wire breakage or a contact failure may occur, which may cause a
device malfunction, a failure, a burnout or a fire.
● Use appropriate size of electric wires. If inappropriate size of electric wire is used, it may cause a fire due
to generated heat.
＜Connection with the current sensor＞
● When using this module, make sure to use it in combination with the dedicated current sensor. Do not
exceed the rating of the module for input of the current sensor. A secondary side (5A) of transformer
cannot directly input tot this module. For further details, refer the manuals for the current sensor to
maintain the functionalities and the accuracy of the module.
● The dedicated current sensor (excludes EMU2-CT5 and EMU-CT5-A) is used only for low voltage circuit.
It cannot be used for a high voltage circuit. EMU2-CT5 and EMU-CT5-A should be used with secondary
side (5A) of transformer transfixed. If it is connected with a high voltage circuit by mistake, it may cause
a burnout of the device and a fire. It is critically dangerous. For the allowance maximum voltage of current
sensor, refer to “10.4.1” in this manual.
● The dedicated current sensor has a polarity (directionality). Be careful about it when installing the module.
● If the wires connected to the module are strongly pulled off, it may cause a malfunction or a breakage to
the module or the wire.
＜Connection of ground＞
● Do not exceed the specified voltage when doing an insulation resistance test and a commercial frequency
withstand voltage test.
● To prevent persons with little knowledge about electric equipment from electric shock, panel must be
taken either following measure.
・ Lock the panel so that only those who get an education about electrical equipment and have
sufficient knowledge can unlock, or shut off power supply automatically upon opening the panel.
・
9
Section 1 SAFETY PRECAUTIONS
Places the ambient temperature exceeds the range -25 - +75 ºC.
Places the relative humidity exceeds the range 5 - 95% or places with dewfall.
Places with metal fragments or conductive substance are flying.
Dust, corrosive gas, saline and oil smoke exist.
RE81WH
1.4 Precautions for Start-up and Maintenance
Caution
● Use the product within the ratings specified in this manual. If it is used outside the ratings, it may cause
not only a malfunction or a failure but also a fire or a burnout.
● Before operating the product, check that active bare wire etc. does not exist around the product. If any
bare wire is found, stop the operation immediately, and take an appropriate action such as isolation
protection.
● Do not disassemble or modify the module. It may cause a failure, a malfunction, an injury or a fire.
● Attaching and detaching the module must be performed after the power source is shut off for all outside
phases. If all phases are not shut off, it may cause an electric shock, a failure or a malfunction of the
module.
● Do not touch powered wires. It may cause a malfunction.
● Tightening mounting screws and cleaning module must be performed after the power source is shut off
for all outside phases. If all phases are not shut off, it may cause an electric shock, a failure or a
malfunction of the module.
● Use a soft dry cloth to clean off dirt of the module surface.
● Do not let a chemical cloth remain on the surface for an extended period of time nor wipe the surface
with thinner or benzene.
● Check for the following items to use this module properly for a long time.
＜Daily maintenance＞
(1) No damage on this module.
(2) No abnormality with LED indicators.
(3) No abnormal noise, smell or heat.
＜Periodical maintenance (Once every 6 months to 1 year) ＞
(4) No looseness with installation, wire connection to terminal blocks, and connector connection.
(Check these items under the electric outage condition.)
1.5 Storage Precautions
To store the module, turn off the power and remove wires, and put it in a plastic bag.
For long-time storage, avoid the following places. Failure to follow the instruction may cause a failure and
reduced life of the module.
・
・Places the average daily temperature exceeds 35 ºC.
・
・Vibration and impact exceed the specifications.
・
・Places exposed to rain, water drops or direct sunlight.
・
1.6 Disposal Precautions
When disposing of this module, treat it as industrial waste.
1.7 Packaging materials and this manual
For reduction of environmental load, packaging materials are produced with cardboard, and this manual is
printed on recycled paper.
10
Section 2 SYSTEM CONFIGURATION
Attachable CPU Module
Attachable CPU Module
CPU Type
CPU Model
CPU Type
CPU Model
Programmable
R00CPU
Process CPU
R08PCPU
R01CPU
R16PCPU
R02CPU
R32PCPU
R120ENCPU
RE81WH
Section 2 SYSTEM CONFIGURATION
2.1 Precautions for system configuration
Attention to the following when configuring the system.
・Please install each modules so that the total number of occupied I/O points of these modules is equal to or less
than the number of I/O points of the CPU module used.
・Depending on the rated output current of the power supply used, mounting of the maximum number of
modules may not be possible. Consider the current consumption of each module to configure the system.
2.2 Applicable system
2.2.1 Applicable module
(1) CPU module
The CPU module that can install RE81WH is shown below.
For the number of mountable modules, refer to the "MELSEC iQ-R Module Configuration Manual".
RE81WH supports multiple CPU system.
controller CPU
R04CPU R120PCPU
R08CPU
R16CPU R16SFCPU
R32CPU R32SFCPU
R120CPU R120SFCPU
R04ENCPU C Controller module R12CCPU-V
R08ENCPU
R16ENCPU
R32ENCPU
Safety CPU R08SFCPU
11
Section 2 SYSTEM CONFIGURATION
Type
Model
R35B
R38B
R312B
R310B
R310B-HT
R38RB-HT
Extension
R65B
R68B
R612B
R610RB
R610B-HT
RE81WH
(2) Base unit
The Base unit that can install RE81WH is shown below.
RE81WH can be installed to any I/O slot
*1 *2
.
*1 In case of Process CPU that operates in redundant mode, it can only be mounted with the extension
base unit. It is not allowed to be mounted with the main base unit.
*2 Limited within the range of I/O points for the CPU module.
Mountable Base unit
Main base
base
R68RB-HT
(3) Applicable software package
Software packages applicable to this module as follows.
Refer to the next page for the version of this module.
Product name Model name Remarks RE81WH version
GX Works3 Version1 SW1DND-GXW3-J
1.040S or later A
1.050C or later B
12
Section 2 SYSTEM CONFIGURATION
Version
A
-
-
Version：A
Version：B
2.2.2 How to confirm the version of RE81WH
Confirm the version of RE81WH as below:
Refer to previous page for the software package corresponding to the each version.
○○○○○○
○○○B○○○○○
Version
Version
Changes for version of RE81WH
RE81WH
(Shipment start date)
Before After
B
(Nov, 2018)
Profile registration needed*
Profile registration unneeded
* When using version A on GX Works3, Profile (for MELSEC iQ-R series Energy Measuring Module
(RE81WH) profile) registration is needed
Refer to “GX Works3 operating manual” for registration of profile.
You can download the profile from the web site. (http://www.mitsubishielectric.com/fa/)
When using version B, Profile registration unneeded.
13
Section 3 NAME AND FUNCTION OF EACH PART
(1) LED
Operating state of this
module is displayed.
(2) Current input terminals
Connect with the secondary
output of the dedicated
current sensor connected to
the current wire of the
measuring circuit.
(3) Voltage input terminals
Connect the voltage input
wire of the measuring circuit.
(6) Strip gauge
A gauge used for
checking the length of
stripped wire.
(5) Check hole
Use this for continuity
check to the terminal.
Use it with a tester
contact.
(4) Push button
Push this button to
insert a cable to the
terminal or remove it.
symbol
3L
3-phase current input terminal (load side)
P1
P3
1-phase voltage input terminal
3-phase voltage input terminal
NC
Unused
Section 3 NAME AND FUNCTION OF EACH PART
3.1 Name of each part
RE81WH
Figure 3.1-1 Appearance of the module
Table 3.1-1 The names and operations of terminal block
Terminal
1k
1L
3k
P2
1-phase current input terminal (power source side)
1-phase current input terminal (load side)
3-phase current input terminal (power source side)
2-phase voltage input terminal
Name of terminal
14
Section 3 NAME AND FUNCTION OF EACH PART
Internal power supply is off, error is in
No measuring electric energy (no
In the case of alarm 1 reset method =
OFF: Alarm 2 not occurring
OFF: Normal operation
Displays the status of
measurement (regeneration)
of this module.
ON: Measuring electric energy (regeneration)
Displays the status of
measurement (regeneration)
ON: Measuring 1-phase electric energy
Displays the status of
measurement (regeneration)
phase electric energy
3.2 Indication and function of LEDs
The following describes names and functions of LEDs.
Table 3.2-1 Names and functions of LEDs
Name Color Role Indicator condition
RUN
LED
MEA.
LED
ALM1
LED
ALM2
LED
Displays the operation status
Green
of this module.
Displays measuring status of
Green
*2
this module.
Displays alarm 1 occurrence
status.
Red
Displays alarm 2 occurrence
status.
Red
ON: Normal operation
OFF:
occurrence in hardware. *1
ON: Measuring electric energy (consumption or
regeneration)
OFF:
measurement)
Flashing: Alarm 1 occurring
ON: Alarm 1 occurring → Not occurring
(
Self-retention)
OFF: Alarm 1 not occurring
Flashing: Alarm 2 occurring
ON: Alarm 2 occurring → Not occurring
(In the case of alarm 2 reset method = Self-
retention)
RE81WH
ERR
LED
R
LED
1
LED
3
LED
Displays error and the status
Red
Green
*2
Green
*2
Green
*2
of this module.
at side 1 of this module.
at side 3 of this module.
Flashing: Error in out of range of setting values
*1
ON: Error in occurrence in hardware
OFF: Other than the above
(regeneration)
OFF: Other than the above
ON: Measuring 3-
(regeneration)
OFF: Other than the above
*1: For details, refer to “8.1 List of error codes” in this manual.
*2: When calculated value is low, “MEA”LED, “R”LED, “1”LED and “3”LED are looked like flashing.
Comparing to the last value per measuring cycle, LEDs light while calculating, then LEDs light off upon
no changes.
Since measuring cycle is shortest as 10ms, short period setting seems like flashing.
*1
15
Section 3 NAME AND FUNCTION OF EACH PART
(consumption, regeneration), reactive energy
), harmonic current, current harmonic
and sequentially stores the records into a buffer memory.
The electric energy only for a period of time when a
certain output signal is ON will be stored in the buffer
power factor, each maximum/minimum values and
date/time of occurrence are stored.
Upper/lower limit alarm
the specified input signal is turned on.
storage of the
Set the integrated value (electric energy (consumption,
regeneration), reactive energy (consumption lag)) to an
circuit into the buffer memory.
3.3 List of functions
Functions of RE81WH are provided in “Table 3.3-1 List of Functions”.
Table 3.3-1 List of Functions
No. Function Descriptions
It measures current, current demand, voltage, electric
power, electric power demand, Reactive power, apparent
power, power factor, frequency, effective energy
1 Measurement
(consumption lag
distortion, harmonic voltage, voltage harmonic distortion,
RE81WH
Reference
section
3.4.1
2 Periodic electric energy
3 Hold max./min. values
4
monitoring
5 Test
6 Integrated value set
7 Output of waveform data
memory.
Periodic energy 1 and 2 can be measured independently.
For current demand, voltage, electric power demand, and
Among current demand, voltage, electric power demand,
and power factor, you can select two measuring items for
which their upper/lower limit can be monitored.
If it exceeds the upper limit or goes below the lower limit,
Parameter setting enables pseudospecified value into the buffer memory, even with non-
existence of input from voltage and current (sensor).
Using this module, you can create a sequence, etc.
arbitrary value.
It is used to clear integrated value.
Stores waveform data of current / voltage of the measured
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
16
Section 3 NAME AND FUNCTION OF EACH PART
Measured items
Details
period of current demand time is
Date of max. value occurrence
Date of min. value occurrence
Phase 1 harmonic current (n th)
Phase 1 harmonic current (Total)
Phase 3 harmonic current (n th) *1
Phase 3 harmonic current (Total) *1
Phase 1 current harmonic distortion (n th)
Phase 1 current harmonic distortion (Total)
Phase 3 current harmonic distortion (n th) *1
Phase 3 current harmonic distortion (Total) *1
RE81WH
3.4 Functions in detail
3.4.1 Measuring function
(1) Measured items
Measured items and measured ranges are described as follows.
Each measured item is stored in the buffer memory at every measuring cycle.
Refer to “5.2.12” for measuring cycle, and refer to “4.2.1(7)” for measuring cycle of harmonic current and
harmonic voltage.
Table 3.4.1-1 List of Measured items (1/2)
Current Phase 1 current
Phase 2 current*1
Phase 3 current*1
Average current
Current demand
* The average of fluctuation for the set
indicated.
Phase 1 current demand
Phase 2 current demand *1
Phase 3 current demand *1
Max. value
Min. value
Harmonic current *2
*1: If phase wire system is set to single-phase 2-wire, measurement will not be taken.
*2: The order of harmonic as follows.
RMS: 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
Distortion: 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
17
Section 3 NAME AND FUNCTION OF EACH PART
Max. value
Min. value
Date/time of max. value occurrence
Date/time of min. value occurrence
1-2 harmonic voltage (n th)
1-2 harmonic voltage (Total)
2-3 harmonic voltage (n th) *1
2-3 harmonic voltage (Total) *1
1-2 voltage harmonic distortion (n th)
1-2 voltage harmonic distortion (Total)
2-3 voltage harmonic distortion (n th) *1
Apparent power
Apparent power
Max. value
Min. value
Date/time of max. value occurrence
Date/time of min. value occurrence
Frequency
Present value
Electric energy (consumption)
Electric energy (regeneration)
Reactive energy
Reactive energy (consumption lag)
Periodic electric energy
Periodic electric energy 1
Periodic electric energy 2
Table 3.4.1-1 List of Measured items (2/2)
Measured items
Details
Voltage 1-2 voltage (voltage V12)
2-3 voltage*1 (voltage V23)
3-1 voltage*1 (voltage V31)
Average voltage
Harmonic voltage *2
RE81WH
2-3 voltage harmonic distortion (Total) *1
Electric power Present value
Electric power demand
* The average of fluctuation for the set
period of electric power demand time
is indicated.
Reactive power Reactive power
Power factor Present value
Electric energy
Present value
Max. value
Min. value
Date/time of max. value occurrence
Date/time of min. value occurrence
*1: If phase wire system is set to single-phase 2-wire, measurement will not be taken.
*2: The order of harmonic as follows.
RMS: 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
Distortion: 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, 19th
18
Section 3 NAME AND FUNCTION OF EACH PART
(The highest value after the max./min. value was reset.)
(The highest value after the max./min. value was reset.)
Highest value among 1-phase current demand, 2-phase current
(The highest value after the max./min. value was reset.)
Minimum
Minimum value of 1-phase current demand
(The lowest value after the max./min. value was reset.)
(The lowest value after the max./min. value was reset.)
phase current
(The lowest value after the max./min. value was reset.)
Maximum
Highest value of the 1 - 2 line voltage
(The highest value after the max./min. value was reset.)
(The highest value after the max./min. value was reset.)
(The lowest value after the max./min. value was reset.)
Lowest value of either the 1 - 2 line voltage or the 2 - 3 line voltage
(The lowest value after the max./min. value was reset.)
(2) Total, maximum, and minimum values
The following describes how to calculate the maximum, minimum, and total values.
Table 3.4.1-2 How to calculate the maximum, minimum and average values
Item Phase wire system Formula
Average
current
Average
voltage
Maximum
current
demand
single-phase 2-wire Average current = 1-phase current
single-phase 3-wire
three-phase 3-wire
single-phase 2-wire Average voltage = voltage V12
single-phase 3-wire
three-phase 3-wire
single-phase 2-wire
single-phase 3-wire
Average current = (1-phase current + 3-phase current) / 2
Average voltage = (voltage V12 + voltage V23) / 2
Maximum value of 1-phase current demand
Highest value of either 1-phase current demand or 3-phase current
demand
RE81WH
current
demand
voltage
Minimum
voltage
three-phase 3-wire
single-phase 2-wire
single-phase 3-wire
three-phase 3-wire
single-phase 2-wire
single-phase 3-wire
three-phase 3-wire
single-phase 2-wire
single-phase 3-wire
three-phase 3-wire
demand, or 3-phase current demand
Lowest value of either 1-phase current demand or 3-phase current
demand
Lowest value among 1-phase current demand, 2demand, or 3-phase current demand
Highest value of either the 1 - 2 line voltage or the 2 - 3 line voltage
Highest value among the 1 - 2 line voltage, the 2 - 3 line voltage, or
3 - 1 line voltage
(The highest value after the max./min. value was reset.)
Lowest value of the 1 - 2 line voltage
(The lowest value after the max./min. value was reset.)
Lowest value among the 1 - 2 line voltage, the 2 - 3 line voltage, or
3 - 1 line voltage
19
Section 3 NAME AND FUNCTION OF EACH PART
decimal point
1 digit after the
decimal point
400 A ≤ PA < 4000 A
-3
Integer
1 A
4000 A ≤ PA
-3
x10
10 A
PV*1
factor
1 digit after the
3300 V ≤ PV
-3
x10
10 V
factor
decimal point
1 digit after the
decimal point
IV
1200 kW ≤ W < 12000 kW
-3
Integer
1 kW
V
12000 kW ≤ W < 120000 kW
-3
x10
10 kW
RE81WH
(3) Resolution of measured data
Resolution of measured data according to the rating (phase wire system, primary voltage setting, and
primary current setting) is described as follows.
(a) Current, current demand
Primary current setting
PA*1
PA < 40 A -3
Multiplying
factor
Resolution*2
2 digits after the
0.01 A
40 A ≤ PA < 400 A -3
0.1 A
*1: Case of setting value of the primary current (Un\G2) is “0”, the primary current (PA) is value of
primary current of CT (Un\G7).
In other cases, the primary current (PA) is the value of primary current (Un\G2).
*2: Digits lower than the resolution are fixed to 0.
(b) Voltage
Primary voltage setting
PV < 330 V -3
Multiplying
Resolution*2
decimal point
0.1 V
330 V ≤ PV < 3300 V -3 Integer 1 V
*1: Case of setting value of the primary voltage (Un\G1) is “0”, the primary voltage (PV) is value of
primary voltage of VT (Un\G5).
In other cases, the primary voltage (PV) is the value of primary voltage (Un\G1).
*2: Digits lower than the resolution are fixed to 0.
(c) Electric power, electric power demand, Reactive power, Apparent power
Full load power W*1
Multiplying
Resolution
*2 *3
I W < 12 kW -3
II 12 kW ≤ W < 120 kW -3
III 120 kW ≤ W < 1200 kW -3
*1: Full load power (W) can be calculated by the following formula.
For calculating full load power W, refer to “Table 3.4.1-3 How to calculate full load power”.
Full load power W(kW) = α × Primary voltage (V) × Primary current (A) / 1000
Case of single-phase 2-wire: α = 1
Case of single-phase 3-wire: α = 2
Case of three-phase 3-wire: α = 3
*2: Digits lower than the resolution are fixed to 0.
*3: The module is kvar for reactive power and kVA for apparent power.
3 digits after the
decimal point
2 digits after the
0.001 kW
0.01 kW
0.1 kW
20
Section 3 NAME AND FUNCTION OF EACH PART
decimal point
factor
decimal point
factor
5 digits after the
decimal point
3 digits after the
decimal point
decimal point
(d) Power factor
Power factor
All setting ranges -3
Multiplying
factor
Resolution*1
1 digit after the
*1: Digits lower than the resolution are fixed to 0.
(e) Frequency
Frequency
Multiplying
Resolution*1
RE81WH
0.1 %
All setting ranges -3
1 digit after the
0.1 Hz
*1: Digits lower than the resolution are fixed to 0.
(f) Electric energy, reactive energy, periodic electric energy
Full load power W*1
Multiplying
I W < 12 kW -5
II 12 kW ≤ W < 120 kW -4
III 120 kW ≤ W < 1200 kW -3
IV 1200 kW ≤ W < 12000 kW -2
V 12000 kW ≤ W < 120000 kW -1
Resolution
decimal point
4 digits after the
2 digits after the
decimal point
1 digit after the
*2 *3
0.00001 kWh
0.0001 kWh
0.001 kWh
0.01 kWh
0.1 kWh
*1: Refer to “(c) *1” about how to calculate Full load power (W).
For calculating full load power W, refer to “Table 3.4.1-3 How to calculate full load power”.
*2: Because the higher resolution than a typical watt-hour meter, the minimum digit values will change
more than 2 at once update in accordance with setting value of input voltage, primary current,
primary voltage of VT, secondary voltage of VT, primary current of CT and the condition of load.
*3: In the case of reactive energy, the unit will be kvarh.
21
Section 3 NAME AND FUNCTION OF EACH PART
110 220 440 690 1100 2200 3300 6600
5
6
7.5
8
10
12
15
20
25
30
40
50
60
75
80
100
120
150
200
250
300
400
500
600
750
800
1000
1200
1500
1600
2000
2500
3000
4000
5000
6000
Primary current [A]
Primary voltage [V]
Ⅰ
Ⅱ
Ⅴ
W < 12 kW
12 kW ≤ W < 120 kW
120 kW ≤ W < 1200 kW
1200 kW ≤ W < 12000 kW
12000 kW ≤ W
< 120000 kW
Table 3.4.1-3 How to calculate full load power
Single-phase 2 wire system
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22
Primary voltage [V]
110
5
6
7.5
8
10
12
15
20
25
30
40
50
60
75
80
100
120
150
200
250
300
400
500
600
750
800
1000
1200
1500
1600
2000
2500
3000
4000
5000
6000
Primary current [A]
Ⅰ
W < 12 kW
Ⅱ
12 kW ≤ W < 120 kW
120 kW ≤ W < 1200 kW
1200 kW ≤ W < 12000 kW
Section 3 NAME AND FUNCTION OF EACH PART
Single-phase 3-wire system
RE81WH
23
Section 3 NAME AND FUNCTION OF EACH PART
110 220 440 690 1100 2200 3300 6600
5
6
7.5
8
10
12
15
20
25
30
40
50
60
75
80
100
120
150
200
250
300
400
500
600
750
800
1000
1200
1500
1600
2000
2500
3000
4000
5000
6000
Primary current [A]
Primary voltage [V]
Ⅰ
W < 12 kW
Ⅱ
12 kW ≤ W < 120 kW
120 kW ≤ W < 1200 kW
1200 kW ≤ W < 12000 kW
Ⅴ
12000 kW ≤ W
< 120000 kW
Three-phase 3-wire system
RE81WH
24
Section 3 NAME AND FUNCTION OF EACH PART
Measuring item
Behavior of the module
Current
When the input current is less than 0.4% of the rating current, it becomes 0A.
is 0A, current demand may not be 0A.
Indicate “0 A” if 1-2 line voltage is 0V.
Frequency condition:
Indicate “0 %” at each phase if harmonic current (Harmonic current (1st)) is 0A.
Indicate “0 %” if 1-2 line voltage is 0V.
When it is less than 44.5Hz, it becomes 0V.
When it is less than 44.5Hz, it becomes 0V.
Apparent power
* The unit is kvar for reactive power and kVA for apparent power.
Electric power
Electric power demand is obtained by electric power moving average. Therefore,
are 0V), it becomes 100%
When it is less than 44.5Hz, it is fixed to 44.5Hz.
RE81WH
(4) Restrictions for measuring data
・Measurement cannot be performed immediately after the power loading to the sequencer system
(Module ready signal is under the OFF condition).
After checking that Module ready (Xn0) is ON, obtain measuring data.
・Measurement cannot be performed immediately after operating conditions are set up to the module. After
checking that Operating condition setting completion flag (Xn9) becomes ON, obtain measuring data.
・Behaviors during operation are as follows.
Current demand Current demand is obtained by current moving average. Therefore, even if the current
Harmonic current Current condition:
Indicate “0 A” at each phase if current is 0A.
Voltage condition:
Indicate “0 A” at all phase if frequency is under 44.5Hz.
Current harmonic
distortion
Harmonic current condition:
Voltage condition:
Frequency condition:
Indicate “0 %” at all phase if frequency is under 44.5Hz.
Voltage Indicate “0 V” if RMS value is under 11V. (*1)
Harmonic voltage Voltage condition:
Indicate “0 V” at each inter-wire if voltage is 0V.
Indicate “0 V” if 1-2 line voltage is 0V.
Frequency condition:
Voltage harmonic
distortion
Electric power,
Reactive power,
demand
Electric energy The electric energy is measured with a load that is about 0.4% or more of all load
Power factor When current is 0A (at all phases are 0A) or when voltage is 0V (all in-between wires
Voltage condition:
Indicate “0 %” at each inter-wire if voltage is 0V.
Indicate “0 %” if 1-2 line voltage is 0V.
Frequency condition:
When current is 0A (at all phases are 0A) or when voltage is 0V (all in-between wires
are 0V), it becomes 0kW.
even if electric power is 0kW, electric power demand may not be 0kW.
power. Even if the indicated value is “0”, measurement value will increase.
Frequency Voltage condition
Indicate “0 Hz” if 1-2 line voltage is 0 V.
Frequency condition
*1: In 1-phase three-wire system, indicate “0 V” if RMS value is under 22V.
25
Section 3 NAME AND FUNCTION OF EACH PART
Periodic
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3.4.2 Measuring function for periodic electric energy
This function is to measure electric energy (consumption) for a certain period, and stores it into the buffer
memory. It can be used to measure electric energy for a certain tact or energy (standby power) when the facility
or equipment is not in operation.
(1) Overview
(a) It can measure two periodic electric energy at maximum (periodic electric energy 1, periodic electric
energy 2). Each of these can be measured independently.
(b) While the time when Periodic electric energy 1 measurement flag (Yn1)/ Periodic electric energy 2
measurement flag (Yn2) is ON, periodic electric energy can be measured.
(c) Since Periodic electric energy is stored in the nonvolatile memory, it can be retained even when a power
source reset.
(d) I/O signals and buffer memory corresponding to each of periodic electric energy 1 and 2 are shown
below.
Periodic
electric energy
1
Periodic
electric energy
2
Supplement
Quantity survey of periodic electric energy is performed every measuring cycle. Therefore, if the
time for turning ON Periodic electric energy 1 measurement flag (Yn1) and Periodic electric energy
2 measurement flag (Yn2) is set to measuring cycle or less, measurement may not be performed.
For the measuring cycle, refer to “5.2.12”.
Buffer memory
(Double words)
Un\G114,115
Un\G116,117
electric
energy
measurement
flag
Yn1 Xn1 Yn3 Xn3
Yn2 Xn2 Yn4 Xn4
Periodic electric
energy data
completion flag
Periodic
electric
energy reset
request
Periodic electric
completion flag
energy reset
26
Section 3 NAME AND FUNCTION OF EACH PART
Period ic ele ctric en ergy 1
OFF
Period ic ele ctric en ergy 1 reset reques t (Yn3)
Period ic ele ctric en ergy 1 reset com pletion flag (Xn3)
(i) (ii)
ON
ON
OFF
OFF
(iii)
Period ic ele ctric en ergy 1 me asuremen t flag (Yn1)
Period ic ele ctric en ergy 1 data co mple tio n flag (Xn1)
ON
OFF
ON
OFF
Period ic ele ctric en ergy １
ON
OFF
(i) (ii)
(iii) (iv) (v)
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(2) Basic procedure
(a) Measuring periodic electric energy
(i) Check that Periodic electric energy measurement flag (Yn1/Yn2) i s O F F.
(ii) Check periodic electric energy (Un\G114, 115/Un\G116, 11 7).
(iii) When starting measurement, set Periodic electric energy measurement flag (Yn1/Yn2) to ON.
This module starts measuring specified periodic electric energy, and Periodic electric energy data
completion flag (Xn1/Xn2) will be turned OFF.
(iv) When stopping measurement, set Periodic electric energy measurement flag (Yn1/Yn2) to OFF.
This module stops measuring the specified periodic electric energy, and Periodic electric energy data
completion flag (Xn1/Xn2) will be turned ON.
(v) Check that Periodic electric energy data completion flag (Xn1/Xn2) becomes ON, and obtain the
value of periodic electric energy.
Figure 3.4.2-1 Basic procedure of measuring the periodic electric energy 1
(b) Resetting periodic electric power
(i) Check that Periodic electric energy measurement flag (Yn1/Yn2) is OFF and Periodic electric energy
reset request (Yn3/Yn4) is OFF.
(ii) Set Periodic electric energy reset request (Yn3/Yn4) to ON. The specified periodic electric energy is
reset to 0 kWh, and Periodic electric energy reset completion flag (Xn3/Xn4) will be turned to ON.
(iii) Check the Periodic electric energy reset completion flag (Xn3/Xn4) has become ON, then set Periodic
electric energy reset request (Yn3/Yn4) to OFF.
Periodic electric energy reset completion flag (Xn3/Xn4) will be turned OFF.
Figure 3.4.2-2 How to reset the periodic electric energy 1
27
Section 3 NAME AND FUNCTION OF EACH PART
Periodic ele ctric energy 1 me asure ment f lag (Yn1)
Periodic ele ctric energy 1 dat a com ple tion flag (Xn1)
ON
OFF
OFF
OFF
Periodic ele ctric energy 1
ON
Period ic ele ctric energy 1 me asure ment f lag (Yn1)
Period ic ele ctric energy 1 data comple tio n flag (Xn1)
ON
OFF
ON
OFF
Period ic ele ctric energy 1
ON
OFF
Period ic ele ctric energy 1 res et request (Yn3)
Period ic ele ctric energy 1 res et com pletion fla g (Xn3)
(i) (ii)
ON
OFF
OFF
(iii) (iv) (v) (vi)
RE81WH
(3) Example of use
(a) Procedure for continuously measuring periodic electric energy
If you turn Periodic electric energy measurement flag (Yn1/Yn2) to ON only while measurement is
needed, this module accumulates the power starting at the previously measured amount. Usage
procedure is the same as (a) in (2).
An example is shown below.
Figure 3.4.2-3 Example of continuous measurement of periodic electric energy 1
(b) Procedure for measuring periodic electric energy at every reset
By the following usage procedure, this module accumulates electric energy every time after resetting
periodic electric energy.
(i) Check that Periodic electric energy measurement flag (Yn1/Yn2) is OFF and Periodic electric energy
reset request (Yn3/Yn4) is OFF.
(ii) Set Periodic electric energy reset request (Yn3/Yn4) to ON.
The specified periodic electric energy is reset to 0 kWh, and Periodic electric energy reset completion
flag (Xn3/Xn4) will be turned ON.
(iii) Check that Periodic electric energy reset completion flag (Xn3/Xn4) has become ON, and then set
Periodic electric energy reset request (Yn3/Yn4) to OFF.
Periodic electric energy reset completion flag (Xn3/Xn4) will be turned OFF.
(iv) When starting measurement, set Periodic electric energy measurement flag (Yn1/Yn2) to ON.
This module starts measuring the specified periodic electric energy, and Periodic electric energy data
completion flag (Xn1/Xn2) will be turned OFF.
(v) When stopping measurement, set Periodic electric energy measurement flag (Yn1/Yn2) to OFF.
This module stops measuring the specified periodic electric energy, and Periodic electric energy data
completion flag (Xn1/Xn2) will be turned ON.
(vi) Check that Periodic electric energy data completion flag (Xn1/Xn2) becomes ON, and obtain the
value of periodic electric energy.
Figure 3.4.2-4 Example of measurement of periodic electric energy 1 every time after resetting
28
Section 3 NAME AND FUNCTION OF EACH PART
Setting value
Description
11
Current demand
12
Voltage
Max./min. value s clea r re qu es t (YnD)
Max./min. value s clea r completion flag (XnD)
ON
ON
OFF
OFF
RE81WH
3.4.3 Max./min. value hold function
It memorizes the max./min. value for each measuring item, and retains them until the max./min. value clear
are performed.
(1) Max./min. value memory
It memorizes the max. and min. values, and the time of occurrence (year/month/day/hour/minute/second/day
of the week/millisecond) values for the following measuring item.
* The max. and min. values and the date of occurrence are stored in the nonvolatile memory, so that these
values can be retained even when a power source reset.
・Current demand
・Voltage
・Electric power demand
・Power factor
(2) How to clear the max. and min. values
You can use the I/O signal to clear the max. and min. values that specified by max./min. values clear target
(Un\G56).
The max. and min. values immediately after the clear becomes the present values and the date of
occurrence will be the present date and time.
The following describes how to clear the max. and min. values.
(a) Check that Max./min. values clear request (YnD) is O F F.
(b) Set the max./min. values clear target(Un\G56).
The setting range is shown below.
13 Electric power demand
14 Power factor
19 All of the above
Others Do not clear
(c) Set Max./min. values clear request (YnD) to ON.
This module clears the max./min. values set by (b), and the date of occurrence, and set Max./min.
values clear completion flag (XnD) to ON.
(d) Check that Max./min. values clear completion flag (XnD) is ON, and then set Max./min. values clear
request (YnD) t o O F F.
Max./min. values clear completion flag (XnD) will be turned OFF.
Figure 3.4.3-1 Procedure for clearing max./min. value
29
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