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Mitsubishi Electric MELSEC iQ-R Series User Manual

Energy measuring module.
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MELSEC iQ-R Series Energy Measuring Module
User' s Manual(Details)
RE81WH

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Table of Contents

Troubleshooting

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   Summary of Contents for Mitsubishi Electric MELSEC iQ-R Series

  • Page 1 MELSEC iQ-R Series Energy Measuring Module User’ s Manual(Details) RE81WH...
  • Page 2: Introduction

    INTRODUCTION (Read these precautions before using this product.) This manual contains important instructions for MELSEC iQ-R series RE81WH. Before using this module, please read this manual and the relevant manuals carefully and pay full attention to safety to handle the product correctly.
  • Page 3 RE81WH ■Checking package contents This following items for this device and included in package. Check that no items are missing. Energy Measuring Module (RE81WH) x1 User’s Manual (Hardware) x1 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.
  • Page 4: Features

    RE81WH FEATURES 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. Extensive monitoring functions.
  • Page 5 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...
  • Page 6: Table Of Contents

    RE81WH CONTENTS INTRODUCTION ............................1 FEATURES .............................. 3 CONTENTS .............................. 5 Section 1 SAFETY PRECAUTIONS ...................... 7 Precautions for Operating Environment and Conditions ..............7 Matters concerning the preparation before use ................. 7 Installation and Wiring Precautions ....................8 Precautions for Start-up and Maintenance ..................10 Storage Precautions .........................
  • Page 7 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 ............................
  • Page 8: Safety Precautions

    Section 1 SAFETY PRECAUTIONS RE81WH Section 1 SAFETY PRECAUTIONS Precautions for Operating Environment and Conditions This module is premised on being used in pollution degree 2 environment. When used in higher pollution (Note1) 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 (Note 1) Do not use this product in the places listed below.
  • Page 9: Installation And Wiring Precautions

    Section 1 SAFETY PRECAUTIONS RE81WH 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.
  • Page 10 Section 1 SAFETY PRECAUTIONS 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.
  • Page 11: Precautions For Start-up And Maintenance

    Section 1 SAFETY PRECAUTIONS RE81WH 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. ●...
  • Page 12: System Configuration

    Section 2 SYSTEM CONFIGURATION RE81WH Section 2 SYSTEM CONFIGURATION 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.
  • Page 13 Section 2 SYSTEM CONFIGURATION RE81WH Base unit The Base unit that can install RE81WH is shown below. RE81WH can be installed to any I/O slot *1 *2 In case of Process CPU that operates in redundant mode, it can only be mounted with the extension base unit.
  • Page 14 Profile registration unneeded Version:A Version:B * 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/)
  • Page 15: Name And Function Of Each Part

    Section 3 NAME AND FUNCTION OF EACH PART RE81WH Section 3 NAME AND FUNCTION OF EACH PART Name of each part (1) LED Operating state of this module is displayed. (4) Push button (2) Current input terminals Push this button to Connect with the secondary insert a cable to the output...
  • Page 16: Indication And Function Of Leds

    Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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 Displays the operation status Normal operation Green of this module.
  • Page 17: List Of Functions

    Section 3 NAME AND FUNCTION OF EACH PART RE81WH List of functions Functions of RE81WH are provided in “Table 3.3-1 List of Functions”. Table 3.3-1 List of Functions Reference Function Descriptions section It measures current, current demand, voltage, electric power, electric power demand, Reactive power, apparent power, power factor,...
  • Page 18: Functions In Detail

    Section 3 NAME AND FUNCTION OF EACH PART RE81WH Functions in detail 3.4.1 Measuring function 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.
  • Page 19 Section 3 NAME AND FUNCTION OF EACH PART RE81WH Table 3.4.1-1 List of Measured items (2/2) Measured items Details Voltage 1-2 voltage (voltage V12) 2-3 voltage (voltage V23) 3-1 voltage (voltage V31) Average voltage Max. value Min. value Date/time of max. value occurrence Date/time of min.
  • Page 20 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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 single-phase 2-wire...
  • Page 21 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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 Multiplying Resolution factor...
  • Page 22 Section 3 NAME AND FUNCTION OF EACH PART RE81WH (d) Power factor Multiplying Power factor Resolution factor 1 digit after the All setting ranges 0.1 % decimal point Digits lower than the resolution are fixed to 0. (e) Frequency Multiplying Frequency Resolution factor...
  • Page 23 Section 3 NAME AND FUNCTION OF EACH PART RE81WH Table 3.4.1-3 How to calculate full load power Single-phase 2 wire system Primary voltage [V] 1100 2200 3300 6600 Ⅰ W < 12 kW Ⅱ 12 kW ≤ W < 120 kW Ⅲ...
  • Page 24 Section 3 NAME AND FUNCTION OF EACH PART RE81WH Single-phase 3-wire system Primary voltage [V] Ⅰ W < 12 kW Ⅱ 12 kW ≤ W < 120 kW Ⅲ 1000 120 kW ≤ W < 1200 kW 1200 1500 1600 2000 2500 3000...
  • Page 25 Section 3 NAME AND FUNCTION OF EACH PART RE81WH Three-phase 3-wire system Primary voltage [V] 1100 2200 3300 6600 Ⅰ W < 12 kW Ⅱ 12 kW ≤ W < 120 kW Ⅲ 120 kW ≤ W < 1200 kW Ⅳ...
  • Page 26 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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.
  • Page 27 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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.
  • Page 28 Section 3 NAME AND FUNCTION OF EACH PART RE81WH Basic procedure (a) Measuring periodic electric energy Check that Periodic electric energy measurement flag (Yn1/Yn2) is OFF. (ii) Check periodic electric energy (Un\G114, 115/Un\G116, 117). (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.
  • Page 29 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 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).
  • Page 30 Section 3 NAME AND FUNCTION OF EACH PART 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. 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.
  • Page 31 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 3.4.4 Upper/lower limit alarm monitoring function You can set an upper and lower limit alarm for maximum two points and implement a monitoring function for them. During the alarm monitoring, you can check the alarm occurrence by the input signal. Setting items of the upper/lower limit alarm monitoring Setting items and setting range for the alarm monitoring are described below.
  • Page 32 Section 3 NAME AND FUNCTION OF EACH PART RE81WH How to set the upper/lower limit alarm monitoring Setting procedures are as following. (a) Check that Operating condition setting request (Yn9) is OFF. (b) Set the alarm item in the buffer memory (Un\G11 / Un\G21), alarm value (Un\G12, 13 / Un\G22, 23), alarm reset method (Un\G14 / Un\G24), and alarm delay time (Un\G15 / Un\G25).
  • Page 33 Section 3 NAME AND FUNCTION OF EACH PART RE81WH (b) When the alarm reset method is in the “1: Self-reset” setting (example of an upper limit monitoring at alarm 1) If the measured value that was set with the alarm 1 monitoring factor exceeds the upper limit and the situation continues and remains for the alarm 1 delay time, Alarm 1 flag (XnA) will be turned ON.
  • Page 34 Section 3 NAME AND FUNCTION OF EACH PART RE81WH How to reset Alarm flag When Alarm flag is ON during the alarm occurrence or the self-retention (in the case of the alarm reset method = “Self-retention“), Alarm flag can be reset (turned OFF) using Alarm reset request. (a) How to reset Alarm flag during alarm occurrence (example of the upper limit alarm monitoring with the alarm 1) If the measured value that was set with the alarm 1 monitoring factor exceeds the upper limit, Alarm...
  • Page 35 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 3.4.5 Test function This function is to output pseudo-fixed value to a buffer memory for debugging sequence program. The value can be output to the buffer memory without input of voltage and current. Caution ●...
  • Page 36 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 3.4.6 Integrated value set function This is a function that can set the integrated value (electric energy (consumption, regeneration), reactive energy (consumption lag)) to an arbitrary value. It is used to clear integrated value. Setting procedure Setting procedures are as follows.
  • Page 37 Section 3 NAME AND FUNCTION OF EACH PART RE81WH 3.4.7 Waveform data output function Waveform data is sampling data of current / voltage waveform of the measured circuit. Using this data, it is possible to display the waveform, obtain changes of waveform. (Each data is converted value as unit V, A) Waveform data is stored into the buffer memory in two methods as below.
  • Page 38 Section 3 NAME AND FUNCTION OF EACH PART RE81WH The waveform data is stored into the buffer memory per sampling period. The waveform data is stored into the buffer memory per sampling period (μs) of the waveform data. This method is used for acquiring the waveform data synchronized with sampling period. Refer to “4.2.1(6)”...
  • Page 39: I/o Signals To Cpu Module

    Section 4 I/O SIGNALS TO CPU MODULE RE81WH Section 4 I/O SIGNALS TO CPU MODULE List of I/O signals I/O signals of RE81WH are listed in Table 4.1-1. Table 4.1-1 List of I/O signals Input signal Output signal (signal direction from RE81WH to CPU module) (signal direction from CPU module to RE81WH) Device Device...
  • Page 40: Details Of I/o Signals

    Section 4 I/O SIGNALS TO CPU MODULE RE81WH Details of I/O signals Detailed explanation about I/O signals of RE81WH is shown as follows 4.2.1 Input signals Module ready (Xn0) After the power of CPU module is turned on or the CPU module reset is performed, it will turn ON upon the measurement is ready.
  • Page 41 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Waveform data acquisition clock (Xn6) The clock is to acquire the waveform data by synchronizing with this module. This signal (Xn6) detects switching of OFF to ON so that it is able to acquire waveform data by synchronizing. *When acquiring waveform data per period of measured data acquisition clock, refer to “5.2.12”.
  • Page 42 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Measured harmonics data acquisition clock (Xn7) The clock is to acquire measured harmonics data by synchronizing with this module. If the signal (Xn7) detects switching from OFF to ON, it is possible to obtain measured harmonics data in synchronization with this module.
  • Page 43 Section 4 I/O SIGNALS TO CPU MODULE RE81WH (c) Synchronizing method Please note as below in order to acquire measured harmonics data by synchronizing with this module. The program is configured to set the scan time of ladder program will be less than 500ms. The scan time should be shorter than ON time and OFF time in order to detect “OFF →...
  • Page 44 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Measured data acquisition clock (Xn8) The clock is to acquire measured data by synchronizing with this module. If it is able to detect switching from ON to OFF (or OFF to ON) of the signal (Xn8), it is possible to obtain measured data in synchronization with this module.
  • Page 45 Section 4 I/O SIGNALS TO CPU MODULE RE81WH (b) Measured items which update data The measured items to update the data in the period of this signal (Xn8) are shown below. Measured items Buffer memory Electric energy Electric energy (consumption) Un\G102, 103 Electric energy (regeneration) Un\G104, 105...
  • Page 46 Section 4 I/O SIGNALS TO CPU MODULE RE81WH (c) Synchronizing method Please note as below in order to acquire measured data by synchronizing with this module. The program is configured to set the scan time of ladder program will be within below range. The scan time should be shorter than ON time and OFF time in order to detect “OFF →...
  • Page 47 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Operating condition setting completion flag (Xn9) When turning Operating condition setting request (Yn9) to ON and changing the following settings, this signal (Xn9) turns ON. ・Phase wire system (Un\G0) ・Primary voltage (Un\G1) ・Primary current (Un\G2) ・Current demand time (Un\G3) ・Electric power demand time (Un\G4)
  • Page 48 Section 4 I/O SIGNALS TO CPU MODULE RE81WH (12) Integrated value set completion flag (XnC) When Integrated value set request (YnC) is turned ON, and preset of each integrated value such as electric energy (consumption), electric energy (regeneration), reactive energy (consumption delay) is completed, this signal (XnC) turns ON.
  • Page 49 Section 4 I/O SIGNALS TO CPU MODULE RE81WH 4.2.2 Output signals Periodic electric energy 1 measurement flag (Yn1) While switching this signal (Yn1) from the ON status to the OFF status, the periodic electric energy 1 is measured, and will be stored into the buffer memory. When this signal (Yn1) is turned OFF, Periodic electric energy 1 data completion flag (Xn1) is turns ON at the time when the periodic electric energy 1 is settled for that period, and then the periodic electric energy 1 is retained.
  • Page 50 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Operating condition setting request (Yn9) When switching this request (Yn9) from the OFF status to the ON status, the following operating conditions will be set. ・Phase wire system (Un\G0) ・Primary voltage (Un\G1) ・Primary current (Un\G2) ・Current demand time (Un\G3) ・Electric power demand time (Un\G4)
  • Page 51 Section 4 I/O SIGNALS TO CPU MODULE RE81WH Max./min. values clear request (YnD) When the max./min. value data (max./min. value and their date/time of occurrence) is reset, this request (YnD) turns ON. When switching this request (YnD) from the OFF status to the ON status after max./min. values clear target (Un\G56) is setting, the max./min.
  • Page 52: Buffer Memory

    Section 5 BUFFER MEMORY RE81WH Section 5 BUFFER MEMORY Buffer memory assignment The following describes buffer memory assignment. Caution ● In the buffer memory, do not write data to the "system area" or area where data writing is not impossible from sequence programs.
  • Page 53 Section 5 BUFFER MEMORY RE81WH Measurement sections (Un\G100 to Un\G2999) Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (1/6) Output value Address Default Back Item Description during the test (Decimal) value mode Electric Multiplying factor of electric energy and reactive energy ×...
  • Page 54 Section 5 BUFFER MEMORY RE81WH Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (2/6) Output value Address Default Back Item Description during the test (Decimal) value mode Voltage Multiplying factor of voltage × System area 1-2 voltage 20100 × 2-3 voltage 20200 ×...
  • Page 55 Section 5 BUFFER MEMORY RE81WH Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (3/6) Output value Address Default Back Item Description during the (Decimal) value test mode Reactive Multiplying factor of reactive power × power System area Reactive power 40100 × 504 - 599 System area Apparent...
  • Page 56 Section 5 BUFFER MEMORY RE81WH Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (4/6) Output value Address Default Back Item Description during the (Decimal) value test mode Harmonic 1000 Multiplying factor of harmonic voltage × voltage 1001 System area 1002 1-2 harmonic voltage (1st) ×...
  • Page 57 Section 5 BUFFER MEMORY RE81WH Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (5/6) Output value Address Default Back Item Description during the (Decimal) value test mode Harmonic 1200 Multiplying factor of harmonic current × current 1201 System area 1202 Phase 1 harmonic current (1st) 2101 ×...
  • Page 58 Section 5 BUFFER MEMORY RE81WH Table 5.1-2 Measurement sections (Un\G100 to Un\G2999) (6/6) Output value Address Default Back Item Description during the (Decimal) value test mode Voltage 1400 Multiplying factor of voltage harmonic distortion × harmonic 1401 System area distortion 1402 1-2 voltage harmonic distortion (3rd) 4103...
  • Page 59 Section 5 BUFFER MEMORY RE81WH Common sections (Un\G3000 to Un\G4999) Table 5.1-3 Common sections (Un\G3000 to Un\G4999) Output value Address Default Back Item Description during the test (Decimal) value mode Error 3000 Latest error code 3001h 3001 Year of time of error 2019h 3002 Month and day of time of error...
  • Page 60 Section 5 BUFFER MEMORY RE81WH Table 5.1-4 Waveform data sections (Un\G10000 to Un\G22013) (2/2) Output value Address Default Back Item Description during the test (Decimal) value mode Current 16000 Multiplying factor of current waveform data waveform 16001 Number of the waveform data of current data 16002 Communication error flag...
  • Page 61: Configurable Sections (un\g0 - Un\g99)

    Section 5 BUFFER MEMORY RE81WH Configurable sections (Un\G0 - Un\G99) 5.2.1 Phase wire system (Un\G0) Phase wire system for target electric circuits is configured below. Setting procedure (a) Set the phase wire in the buffer memory. Setting range is as follows. Setting value Description single-phase 2-wire...
  • Page 62 Section 5 BUFFER MEMORY RE81WH (b) Turn Operating condition setting request (Yn9) from OFF to ON to enable the setting. (Refer to “4.2.2(5)”.) Default value Primary voltage (Un\G1) is set to [2: 220 V (Direct connection)]. Primary voltage of VT (Un\G5) is set to [0]. Secondary voltage of VT (Un\G6) is set to [0].
  • Page 63 Section 5 BUFFER MEMORY RE81WH Table 5.2.3-1 Setting value of Primary current and primary current of CT (2/2) Primary current Primary Primary current Primary (Un\G2) current of (Un\G2) current of Current sensor Current sensor Setting Setting Description Description value (Un\G7) value (Un\G7) 1000...
  • Page 64 Section 5 BUFFER MEMORY RE81WH 5.2.4 Current demand time (Un\G3) Set a time duration for which the moving average of current demand value is calculated from the measured current value. If current demand time is set short, the response to change of current will be quick; however, the fluctuation range may be too large.
  • Page 65 Section 5 BUFFER MEMORY RE81WH 5.2.6 Alarm 1 monitoring factor (Un\G11), alarm 2 monitoring factor (Un\G21) Set which measuring item will be monitored for the upper/lower limit alarm. Alarm 1 and 2 operate independently. Setting procedure (a) Set the item for alarm 1 and 2 in the buffer memory. Setting range is as follows. Setting value Description No monitoring...
  • Page 66 Section 5 BUFFER MEMORY RE81WH (c) Operating condition setting request (Yn9) from OFF to ON to enable the setting. (Refer to “4.2.2(5)”.) Default value It is set to [0: not monitoring]. 5.2.7 Alarm 1 monitoring value (Un\G12, 13), alarm 2 monitoring value (Un\G22, 23) Set the upper/lower limit monitoring value for the target that was set in alarm 1 monitoring factor and alarm 2 monitoring factor.
  • Page 67 Section 5 BUFFER MEMORY RE81WH 5.2.8 Alarm 1 reset method (Un\G14), Alarm 2 reset method (Un\G24) Set the reset method of the alarm1 and alarm 2. For differences in behavior of alarm monitoring for different reset methods, refer to “3.4.4(3)”. Setting procedure (a) Set the reset method for alarm 1 and 2 in the buffer memory.
  • Page 68 Section 5 BUFFER MEMORY RE81WH 5.2.10 Integrated value setting target (Un\G51), Integrated value setting value (Un\G52, 53) Set any value to the integrated value. Setting procedure (a) Set the integrated value setting target (Un\G51) in the buffer memory. Setting range is as follows. Setting value Description No set...
  • Page 69 Section 5 BUFFER MEMORY RE81WH 5.2.11 Max./min. values clear target (Un\G56) Set to clear the data by max./min. clear request. Setting procedure (a) Set the max./min. values clear target(Un\G56) in the buffer memory. Setting range is as follows. Setting value Description Current demand Voltage...
  • Page 70 Section 5 BUFFER MEMORY RE81WH 5.2.12 Period of measured data acquisition clock (Un\G60, 61) Set a data update period. Period of measured data acquisition clock (Xn8) is the data update period. If period of measured data acquisition clock is 10ms, measured data acquisition clock (Xn8) operates at a cycle of 10ms.
  • Page 71: Measurement Sections (un\g100 - Un\g2999)

    Section 5 BUFFER MEMORY RE81WH Measurement sections (Un\G100 - Un\G2999) This product divides the measuring data into the “Data” and “Multiplying factor”, and output them to Buffer memory. Actual measuring data is obtained by the following formula. Measuring data = Data × 10 (Multiplying factor is n).
  • Page 72 Section 5 BUFFER MEMORY RE81WH 5.3.2 Electric energy (consumption) (Un\G102, 103), electric energy (regeneration) (Un\G104, 105) Stores the electric energy of the consumption side and the regeneration side will be stored. Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory. ・Data range: 0 to 999999999 * When the stored data exceeds 999999999, stored data turns to 0 and continues measuring.
  • Page 73 Section 5 BUFFER MEMORY RE81WH 5.3.4 Periodic electric energy 1 (Un\G114, 115), periodic electric energy 2 (Un\G116, 117) Stores the periodic electric energy 1 and periodic electric energy 2. The periodic electric energy of the consumption side is measured. For specific usage procedures for the periodic electric energy, refer to “3.4.2”. Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory.
  • Page 74 Section 5 BUFFER MEMORY RE81WH 5.3.6 Phase 1 current (Un\G202, 203), Phase 2 current (Un\G204, 205), Phase 3 current (Un\G206, 207) The electric current (present value) of each phase is stored. Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory. ・Data range: 0 to 99999990 (0 to 99999.990 A) * Restrictions for measured data including resolution and measuring range, refer to “3.4.1”.
  • Page 75 Section 5 BUFFER MEMORY RE81WH 5.3.9 Maximum current demand (Un\G220, 221), minimum current demand (Un\G228, 229) Stores the max./min. values of the electric current demand among phases. For procedure for storing the max./min. the electric current demand using phase wire system, refer to “3.4.1(2)”.
  • Page 76 Section 5 BUFFER MEMORY RE81WH Details of stored data (a) Storage format As indicated below, Data is stored as BCD code in the buffer memory. Buffer memory address Storage format b12 b11 ~ b8 b7 ~ b4 b3 ~ ~ e.g.) Year 2010 Un\G222 2010h...
  • Page 77 Section 5 BUFFER MEMORY RE81WH 5.3.11 Multiplying factor of voltage (Un\G300) The multiplying factor of the electric voltage is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: -3 (fixed) (b) Update timing Because it is fixed at -3, there is no update.
  • Page 78 Section 5 BUFFER MEMORY RE81WH 5.3.14 Maximum voltage (Un\G320, 321), minimum voltage (Un\G328, 329) Stores the max./min. values of the voltage among in-between wires. For procedure for storing the max./min. voltage using phase wire system, refer to “3.4.1(2)”. Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory.
  • Page 79 Section 5 BUFFER MEMORY RE81WH Details of stored data (a) Storage format As indicated below, Data is stored as BCD code in the buffer memory. Buffer memory address Storage format b12 b11 ~ b8 b7 ~ b4 b3 ~ ~ e.g.) Year 2010 Un\G322 2010h...
  • Page 80 Section 5 BUFFER MEMORY RE81WH 5.3.16 Multiplying factor of electric power (Un\G400) The multiplying factor of electric power is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: -3 (fixed) (b) Update timing Because it is fixed at -3, there is no update.
  • Page 81 Section 5 BUFFER MEMORY RE81WH 5.3.18 Electric power demand (Un\G404, 405) Stores the electric power that is measured based on the moving average for the duration of time configured in the electric power demand time (Un\G4). Details of stored data (a) Storage format Data is stored as double-word 32-bit signed binary in the buffer memory.
  • Page 82 Section 5 BUFFER MEMORY RE81WH Details of stored data (a) Storage format As indicated below, Data is stored as BCD code in the buffer memory. Buffer memory address Storage format b12 b11 ~ b8 b7 ~ b4 b3 ~ ~ e.g.) Year 2010 Un\G422 2010h...
  • Page 83 Section 5 BUFFER MEMORY RE81WH 5.3.21 Multiplying factor of reactive power (Un\G500) The multiplying factor of reactive power is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: -3 (fixed) (b) Update timing Because it is fixed at -3, there is no update.
  • Page 84 Section 5 BUFFER MEMORY RE81WH 5.3.24 Apparent power (Un\G602, 603) The apparent power is stored. Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory. ・Data range: 0 to 999999999 (0.000 to 999999.999 kVA) * Restrictions for measured data including resolution and measuring range, refer to “3.4.1”.
  • Page 85 Section 5 BUFFER MEMORY RE81WH 5.3.27 Maximum power factor (Un\G720, 721), minimum power factor (Un\G728, 729) The max./min. power factors are stored. Details of stored data (a) Storage format Data is stored as double-word 32-bit signed binary in the buffer memory. ・Data range: -100000 to 100000 (-100.000 to 100.000%) * For the resolution, refer to “3.4.1”.
  • Page 86 Section 5 BUFFER MEMORY RE81WH Details of stored data (a) Storage format As indicated below, Data is stored as BCD code in the buffer memory. Buffer memory address Storage format b12 b11 ~ b8 b7 ~ b4 b3 ~ ~ e.g.) Year 2010 Un\G722 2010h...
  • Page 87 Section 5 BUFFER MEMORY RE81WH 5.3.29 Multiplying factor of frequency (Un\G800) The multiplying factor of the frequency is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: -3 (fixed) (b) Update timing Because it is fixed at -3, there is no update.
  • Page 88 Section 5 BUFFER MEMORY RE81WH 5.3.32 1-2 harmonic voltage (Un\G1002 - Un\G1021), 2-3 harmonic voltage (Un\G1030 - Un\G1049) Stores the harmonic voltage RMS between each line. (1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th are stored.) Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory.
  • Page 89 Section 5 BUFFER MEMORY RE81WH 5.3.35 Phase 1 harmonic current (Un\G1202 - Un\G1221), Phase 3 harmonic current (Un\G1260 - Un\G1279) Stores the harmonic current RMS between each phase. (1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th are stored.) Details of stored data (a) Storage format Data is stored as double-word 32-bit unsigned binary in the buffer memory.
  • Page 90 Section 5 BUFFER MEMORY RE81WH 5.3.38 1-2 voltage harmonic distortion (Un\G1402 - Un\G1410), 2-3 voltage harmonic distortion (Un\G1420 - Un\G1428) Stores the harmonic voltage distortion ratio between each line. (3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th are stored.) Details of stored data (a) Storage format Data is stored as 16-bit unsigned binary in the buffer memory.
  • Page 91 Section 5 BUFFER MEMORY RE81WH 5.3.41 Phase 1 current harmonic distortion (Un\G1602 - Un\G1610), phase 3 current harmonic distortion (Un\G1640 - Un\G1648) Stores the harmonic current distortion ratio between each phase. (3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th are stored.) Details of stored data (a) Storage format...
  • Page 92: Common Sections (un\g3000 - Un\g4999)

    Section 5 BUFFER MEMORY RE81WH Common sections (Un\G3000 - Un\G4999) 5.4.1 Latest error code (Un\G3000) The latest error code that is detected with this module will be stored. For the list of error codes, refer to “8.1 List of error codes”. Details of stored data (a) Storage format Data is stored as 16-bit unsigned binary in the buffer memory.
  • Page 93 Section 5 BUFFER MEMORY RE81WH 5.4.2 Year of time of the error (Un\G3001), month and day of time of error (Un\G3002), hour and minute of time of error (Un\G3003), second and day of the week of time of error (Un\G3004), millisecond of time of error (Un\G3005) The year, month, day, hour, minute, second, day of the week and millisecond of time of the error will be stored.
  • Page 94 Section 5 BUFFER MEMORY RE81WH 5.4.3 Status of LEDs (Un\G3100, 3101) The status of LEDs will be stored. Details of stored data (a) Storage format As indicated below, Data is stored in the buffer memory. Buffer memory address Storage format b12 b11 b8 b7 b4 b3...
  • Page 95: Waveform Data Sections (un\g10000 - Un\g22013)

    Section 5 BUFFER MEMORY RE81WH Waveform data sections (Un\G10000 - Un\G22013) 5.5.1 Multiplying factor of voltage waveform data (Un\G10000) The multiplying factor of waveform data of voltage is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: -3 (fixed) (b) Update timing Because it is fixed at -3, there is no update.
  • Page 96 Section 5 BUFFER MEMORY RE81WH 5.5.4 1-2 voltage waveform data 1 to 300 (Un\G10004 - Un\G10603), 2-3 voltage waveform data 1 to 300 (Un\G12004 - Un\G12603) Waveform data of each inter-wire voltage is stored. Stores data of the number of the waveform data of voltage (Un\G10001) from waveform data 1. Details of stored data (a) Storage format Data is stored as double-word 32-bit signed binary in the buffer memory.
  • Page 97 Section 5 BUFFER MEMORY RE81WH 5.5.7 Communication error flag (Un\G16002) Result of internal communication of RE81WH is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: 0, 1 (0: no error, 1: error) (b) Update timing It will be updated every measuring cycle.
  • Page 98 Section 5 BUFFER MEMORY RE81WH 5.5.10 Communication error flag (Un\G22001) Result of internal communication of RE81WH is stored. Details of stored data (a) Storage format Data is stored as 16-bit signed binary in the buffer memory. ・Data range: 0, 1 (0: no error, 1: error) (b) Update timing It will be updated every measuring cycle.
  • Page 99: Setting And Procedure For Operation

    Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Section 6 SETTING AND PROCEDURE FOR OPERATION Procedure for operation Start Mounting the module Mount RE81WH to the specified base unit. (Refer to “6.2”.) Wiring Wire RE81WH for external device. (Refer to “6.3”.) Parameter setting Perform settings using GX Works3.
  • Page 100: Mounting And Removing The Module

    Caution ● Mount to the base of MELSEC iQ-R series. ● When mounting the module, make sure to insert the protruding portions for fixing the module into the holes on the base unit. In those case, insert it securely so that the protruding portion of the module does not come off of the holes.
  • Page 101 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.2.2 How to detach it from the base unit 1. Support the module with both hands and securely press the module fixing hook (1) with your finger. 2. Pull the module straight supporting it at its bottom while pressing the module fixing hook (1).
  • Page 102: Wiring

    Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Wiring 6.3.1 Precautions for wiring Caution ● For protection against noise, 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...
  • Page 103 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.3.2 How to connect wires Follow the “6.3.3 How to wire” for external connection to RE81WH. Use applicable wire as described below. At the connection between the secondary terminal of the dedicated current sensor (excludes EMU2-CT5) and current input terminals, use twisted pair cable.
  • Page 104 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.3.3 How to wire Follow the wiring diagram (Figure 6.3.3-1 ~ 6.3.3-5) for external connection of RE81WH. In the case using 5A current sensor. (a) Case of using EMU2-CT5 Power supply side 5A current sensor cable EMU2-CB-Q5A Current...
  • Page 105 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH In the case using split-type current sensor (a) Case of Three-phase 3-wire system Power supply side EMU-CT*** model current sensor (50/100/250) EMU-CT***-A model current sensor (50/100/250/400/600) Load side Figure 6.3.3-3 In the case of Three-phase 3-wire system (b) Case of Single-phase 2-wire system Power supply side EMU-CT*** model...
  • Page 106 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (c) Case of Single-phase 3-wire system Power supply side (1) (0) (2) EMU-CT*** model current sensor (50/100/250) EMU-CT***-A model current sensor (50/100/250/400/600) Load side Figure 6.3.3-5 In the case of Single-phase 3-wire...
  • Page 107 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.3.4 Current circuit connection A dedicated current sensor is required to connect the current circuit. ■ How to attach EMU-CT5/CT50/CT100/CT250-A Press the locking claw of the moving core, please open the moving core by removing the engagement (Figure 1).
  • Page 108 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH ■ How to attach EMU-CT400/CT600-A Press the locking claw of the moving core, please open the moving core by removing the engagement (Figure 1). At this time, the hinge cover opens automatically. Before inserting the cable, check the symbols K and L to fit the current sensor in the correct direction.
  • Page 109 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH ■ How to attach EMU-CT50/CT100/CT250 Follow the procedure below to attach to the cable of the target circuit. Protective cover Open the movable core, as shown in the figure on the right. Lift slowly the hooks located on both sides of the movable core, and detach them from the stopper.
  • Page 110 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH ■ How to attach EMU2-CT5 Transfix EMU2-CT5 current sensor cable to the secondary-side wire of current transformer (/5A rated). Make sure to use it in a correct combination with 5A current sensor conversion cable: EMU2-CB-Q5A EMU2-CT5 has polarities.
  • Page 111 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH ■ When wiring single-phase 2-wire circuit 5A current sensor is not used L3. As shown below, L3 remove connector, and connector with insulating tape. Insulating tape EMU2-CT5 ■ Extending the cable of 5 A current sensor If the cable from current sensor is too short, you can extend it by using an extension cable as shown below.
  • Page 112 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Connecting 5 A current sensor and extension cable (separate) (a) Remove the connectors. EMU2-CT5(0.5m) (b) Connecting the extension cable. EMU2-CB-T**MS (1 to 10m) EMU2-CB-Q5A (0.5m) Supplement Cable extension for EMU2-CT5 is 10 m max. (Total cable length is 11m max.) Use extension cable (separate) when 1-phase and 3-phase are set apart.
  • Page 113: Parameter Setting

    Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Parameter setting This section explains setting from GX Works3 necessary to use RE81WH. Before performing this setting, install GX Works3 and connect the Management CPU with the PC using a USB cable. For details, refer to the “manual of CPU module”.
  • Page 114 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.4.1 Addition the module Add the model name of the energy measuring module to use the project. * When adding the module, it is necessary to add the module to system parameter in addition to the operation of this procedure.
  • Page 115 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.4.2 Parameter setting Set the parameters. Setting parameters on the screen omits the parameter setting in a program. Setting procedure Below diagrams are examples of setting the RE81WH as “Mounting slot No.: 0”, “Start I/O No.: 0000”. The start I/O No.
  • Page 116 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (c) Select [Write to PLC] in [Online] menu, and “Online Data Operation” window will be displayed. Please write to PLC according to your environment. (Example) When write to CPU built in memory: Click the check box of “(Project Name)”...
  • Page 117 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (d) Reset the CPU module (OFF → ON) or power on the programmable controller again. (e) Operate the CPU module “STOP → RUN”. (f) Open the “Device/Buffer Memory Batch Monitor”. Select [Online] → [Monitor] → [Device/Buffer Memory Batch Monitor]. (g) Input “Yn9”...
  • Page 118 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Setting items The data can be setup is showed below. Bold text is default setting value. (a) Mode setting Set the operation mode. Item Setting value Reference Mode setting Measuring mode 3.4.5 Test mode (b) Basic settings Make necessary settings for energy measurement.
  • Page 119 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Item Setting value Reference Primary current Any current (EMU-CT5-A) Any current (EMU2-CT5) 50A (EMU-CT50-A) 50A (EMU-CT50) 100A (EMU-CT100-A) 100A (EMU-CT100) 250A (EMU-CT250-A) 250A (EMU-CT250) 400A (EMU-CT400-A) 5/5A (EMU2-CT5) 600A (EMU-CT600-A) 6/5A (EMU2-CT5) 5/5A (EMU-CT5-A) 7.5/5A (EMU2-CT5) 6/5A (EMU-CT5-A)
  • Page 120 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (c) Alarm setting Setting the upper/lower limit alarm. Item Setting value Reference Alarm 1 monitoring factor No monitoring Current demand upper limit Current demand lower limit Voltage upper limit Voltage lower limit 5.2.6 Electric power demand upper limit Electric power demand lower limit...
  • Page 121 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.4.3 Auto Refresh This function transfers data in the buffer memory to specified devices. Programming of reading/writing data is unnecessary. Setting procedure Below diagrams are examples of setting the RE81WH as “Mounting slot No.: 0”, “Start I/O No.: 0000”. The start I/O No.
  • Page 122 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (d) Select [Write to PLC] in [Online] menu, and “Online Data Operation” window will be displayed. Please write to PLC according to your environment. (Example) When write to CPU built in memory: Click the check box of “(Project Name)”...
  • Page 123 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH Setting items The data can be setup is showed below. Bold text is default setting value. (a) Transfer to CPU Specify the refresh destination for measurement section and waveform data section of buffer memory. (b) Refresh timing Set the refresh timing of the specified refresh destination.
  • Page 124 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.4.4 Integrated value set function This function is to set integrated value (electric energy (consumption, regeneration) and reactive energy (consumption lag)) to any value. If you want to clear integrated value, set it to 0. Setting procedure Below diagrams are examples of setting the RE81WH as “Mounting slot No.: 0”, “Start I/O No.: 0000”.
  • Page 125 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH (e) Setting the [Integrated value setting target] (Un\G51) and [Integrated value setting value] (Un\G52, 53). Setting range is as follows. Integrated value setting target (Un\G51) Setting value Description No set Electric energy (consumption) Electric energy (regeneration) Reactive energy (consumption lag) (ii) Integrated value setting value (Un\G52, 53)
  • Page 126 Section 6 SETTING AND PROCEDURE FOR OPERATION RE81WH 6.4.5 Debugging program RE81WH provides a test function so that you can debug a program with no input of voltage or current. Pseudo- value can be stored into the buffer memory. For detailed explanation for the test function, refer to “3.4.5”. Caution ●...
  • Page 127: Programming

    Section 7 PROGRAMMING RE81WH Section 7 PROGRAMMING This chapter explains about programming for RE81WH. When you apply sample programs introduced in this chapter into the actual system, make sure to verify in advance that there is no problem with the target system control. Follow the procedure in Figure 7.1-1 to create a sample program using RE81WH.
  • Page 128: System Configuration And Usage Conditions For Sample Program

    Section 7 PROGRAMMING RE81WH System configuration and usage conditions for sample program A sample program under the following system and the usage condition is shown below. 7.2.1 System configuration Output module (Y30 - Y3F) CPU module Input module (X20 - X2F) RE81WH (X/Y0 - X/Y1F) Figure 7.2.1-1 Sample system configuration using a sample program 7.2.2...
  • Page 129 Section 7 PROGRAMMING RE81WH Before creating a program, mount RE81WH to the base unit, and connect it to external devices. <Example> Electric current sensor: EMU-CT250-A Power supply side Load side Figure 7.2.3-1 Example of wiring using a sample program...
  • Page 130: Sample Programming

    Section 7 PROGRAMMING RE81WH Sample programming 7.3.1 Sample program when performing the initial setting using GX Works3. List of devices Table 7.3.1-1 List of devices Device Module Function CPU module Device that stores latest error code Module ready Alarm 1 flag Alarm 2 flag RE81WH (X/Y0 - X/Y1F)
  • Page 131 Section 7 PROGRAMMING RE81WH Sample program Instruct to measure the periodic electric energy 1 (Measurement is taken while X10 is ON.) Instruct to measure the periodic electric energy 2 (Measurement is taken while X10 is OFF.) Output ON to Y20 when the alarm 1 occurs Output ON to Y21 when the alarm 2 occurs Acquire the latest error code Output ON to Y22 when an error occurs...
  • Page 132 Section 7 PROGRAMMING RE81WH 7.3.2 Sample program when make the initial setting using sequence program. List of devices Table 7.3.2-1 List of device Device Module Function Device that stores multiplying factor of electric energy and reactive energy D2,D3 Device that stores electric energy (consumption) D4,D5 Device that stores Average current D6,D7...
  • Page 133 Section 7 PROGRAMMING RE81WH List of buffer memories to be used Table 7.3.2-2 List of buffer memories to be used Setting Buffer memory Description Remarks value Phase wire system Three-phase 3-wire U0\G0 Primary voltage 220 V U0\G1 Primary current 250 A (EMU-CT250-A) U0\G2 Current demand time 30 sec...
  • Page 134 Section 7 PROGRAMMING RE81WH Sample program Basic operating condition setting Alarm 1 operating condition setting Alarm 2 operating condition setting Period of measured data acquisition clock setting Set the request of operating condition setting (Y9) to ON. Set the request of operating condition setting (Y9) to OFF.
  • Page 135 Section 7 PROGRAMMING RE81WH Acquire each type of the measured values Instruct to measure the periodic electric energy 1 (Measurement is taken when X20 is ON.) Instruct to measure the periodic electric energy 2 (Measurement is taken when X20 is OFF.) Output ON to Y30 when the alarm 1 occurs Output ON to Y31 when the...
  • Page 136: Troubleshooting

    Section 8 TROUBLESHOOTING RE81WH Section 8 TROUBLESHOOTING Caution ● If an abnormal sound, bad-smelling smoke, fever break out from this module, switch it off immediately and don’t use it. List of error codes When the Data is written to the CPU module from this module or when a reading error occurs, error codes will be stored into the following buffer memory.
  • Page 137 Section 8 TROUBLESHOOTING RE81WH Table 8.1-2 List of error codes (2/2) Error code Error Descriptions Action Reference (HEX) level Alarm 1 delay time (Un\G15) is Set alarm 1 delay time within the 180Ah 5.2.9 range* of 0 to 300 (seconds). set out of range.
  • Page 138: Troubleshooting

    Section 8 TROUBLESHOOTING RE81WH Troubleshooting 8.2.1 When “RUN” LED is turned off Table 8.2.1-1 When “RUN” LED is turned off Check item Action Reference Check that supply voltage of the power source is within Is power source is supplied? - the rating.
  • Page 139 Section 8 TROUBLESHOOTING RE81WH 8.2.3 If electric energy cannot be measured The following check has to be performed while current is flowing from the power source side to the load side. Table 8.2.3-1 If electric energy cannot be measured Check item Action Reference “MEA.”...
  • Page 140 Section 8 TROUBLESHOOTING RE81WH 8.2.4 If the electric current and voltage that are measured using this module do not match with the ones measured with other gauge Table 8.2.4-1 If current and voltage that are measured using this module do not match with the ones measured with other gauge Check item Action...
  • Page 141 Section 8 TROUBLESHOOTING RE81WH Q&A 8.3.1 General To what degree is the module durable against overvoltage and over current? Is external protective circuit required? Momentary* : Up to 2 times as high as rated voltage and 20 times as high as rated current. Continuous : Up to 1.1 times as high as rated voltage and rated current.
  • Page 142 Section 8 TROUBLESHOOTING RE81WH 8.3.2 Q&A about Specifications What accuracy does “measuring accuracy” mean? In terms of the amount of electricity, it means a range of tolerances in reading values. For example, when the reading value is “10 kWh,” a tolerance is ±0.2 kWh. In terms of measuring items other than the amount of electricity, it means tolerance for the rated input.
  • Page 143 Section 8 TROUBLESHOOTING RE81WH 8.3.3 Q&A about Installing What is wire diameter that allows installing a current sensor? The nominal cross-sectional areas of the conductor of 600-V vinyl coated wires that can penetrate (values for reference), refer to “6.3.4” The above shows the standard nominal cross-sectional areas. Due to the outer difference of finished vinyl insulation and deformation (bending) depending on manufacturers, a wire may not penetrate.
  • Page 144: Requirement For The Compliance With Emc And Low Voltage Directives

    Section 9 REQUIREMENT FOR THE COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES RE81WH Section 9 REQUIREMENT FOR THE COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES For programmable controller system To configure a system meeting the requirements of the EMC and Low Voltage Directives when incorporating the Mitsubishi programmable controller (EMC and Low Voltage Directives compliant) into other machinery or equipment, refer to “MELSEC iQ-R Module Configuration Manual”.
  • Page 145: Specification

    Section 10 SPECIFICATION RE81WH Section 10 SPECIFICATION 10.1 General specifications Item Specifications Phase wire system single-phase 2-wire / single-phase 3-wire / three-phase 3-wire Rating Voltage single-phase 110 V , 220 V AC circuit 2-wire, three-phase 3-wire single-phase 110V AC (1 - 2 line, 2 - 3 line) 220 V (1 - 3 line) 3-wire Current circuit 5A, 50 A, 100 A, 250 A, 400 A, 600 A AC...
  • Page 146 Section 10 SPECIFICATION RE81WH 5 A primary current can be set when using the current sensor is as follows. 5A, 6A, 7.5A, 8A, 10A, 12A, 15A, 20A, 25A, 30A, 40A, 50A, 60A, 75A, 80A, 100A, 120A, 150A, 200A, 250A, 300A, 400A, 500A, 600A, 750A , 800A, 1000A, 1200A, 1500A, 1600A, 2000A, 2500A, 3000A, 4000A, 5000A, 6000A (Primary current of CT can be set up to 6000A in any .
  • Page 147: 10.2 Electrical And Mechanical Specifications

    Section 10 SPECIFICATION RE81WH 10.2 Electrical and mechanical specifications Item Specifications Consumed Voltage Each phase 0.1 VA (at 110 V AC), Each phase 0.2 VA (at 220 V AC) circuit Current Each phase 0.1 VA (secondary side of current sensor) circuit Internal current...
  • Page 148: 10.3 External Dimensions

    Section 10 SPECIFICATION RE81WH 10.3 External dimensions Unit [mm]...
  • Page 149: 10.4 Optional Devices

    Section 10 SPECIFICATION RE81WH 10.4 Optional devices 10.4.1 Specifications ■ Split type current sensor Item Specifications Model EMU-CT50 EMU-CT100 EMU-CT250 Rated primary current 50A AC 100A AC 250A AC Rated secondary current 16.66 mA 33.33 mA 66.66 mA Rated burden 0.1 VA Maximum voltage 460V AC...
  • Page 150 Section 10 SPECIFICATION RE81WH ■ 5A current sensor Item Specifications Model EMU2-CT5 EMU-CT5-A Rated primary current 5A AC Rated secondary current 1.66mA Rated burden 0.1VA Maximum voltage 260V AC 460V AC (voltage to ground / line voltage) ±1% (5% to 100% of rating, ±1% (5% to 100% of rating, Ratio error ≤...
  • Page 151 Section 10 SPECIFICATION RE81WH 10.4.2 External dimensions ■ Current sensor ◆ EMU-CT50,EMU-CT100,EMU-CT250 Protective cover Hole for fixing (3×2) Binding band Stopper Movable core Hook for fixing the movable core Unit [mm] Model EMU-CT50 31.5 39.6 55.2 25.7 15.2 18.8 EMU-CT100 EMU-CT250 36.5 44.8...
  • Page 152 Section 10 SPECIFICATION RE81WH ◆ EMU-CT250-A,EMU-CT400-A,EMU-CT600-A Unit [mm] Model EMU-CT250-A 42.6 49.4 74.5 25.2 EMU-CT400-A 44.9 67.2 EMU-CT600-A ◆ EMU2-CT5 Unit [mm] Sensor in detail Unit [mm]...
  • Page 153 Section 10 SPECIFICATION RE81WH ■ Dedicated cable ◆ 5A current sensor cable EMU2-CB-Q5A Unit [mm] ◆ Extension cable (standard) EMU2-CB-T**M Unit [mm] Model EMU2-CB-T1M EMU2-CB-T5M EMU2-CB-T10M Length 1000 5000 10000 ◆ Extension cable (separate) EMU2-CB-T**MS Unit [mm] Model EMU2-CB-T1MS EMU2-CB-T5MS EMU2-CB-T10MS Length 1000...
  • Page 154: Appendix

    APPENDIX RE81WH APPENDIX Calculation methods of measured items is shown below. Items formula � ���� ����−1 � ���� ���� ���� ���� ����=0 ���� Current for phase p � (���� − ���� ����−1 � ���� ���� ���� ���� ���� ���� ���� ����...
  • Page 155: Index

    INDEX RE81WH INDEX Alarm delay time ..........30 List of functions ..........16 Alarm flag (XnA/XnB) ......31, 32, 46 List of I/O signals ..........38 Alarm monitoring factor ........30 Alarm reset method ..........30 Alarm reset request (YnA/YnB) ....31, 49 Max./min.
  • Page 156 INDEX RE81WH Test function ..........34, 125 Troubleshooting ..........135 Upper/lower limit alarm monitoring function ..30 Waveform data ........36, 40, 44 Waveform data acquisition clock (Xn6) ....40 Wiring ..............101...
  • Page 157: Warranty

    WARRANTY RE81WH WARRANTY For using this product, please thoroughly read the following product warranty descriptions. 1. Gratis Warranty Period and Gratis Warranty Coverage If any failure or defect (hereinafter collectively called “failures”) for which our company is held responsible occurs on the product during the gratis warranty period, our company shall replace the product for free through the distributor at which you purchased the product or our service company.
  • Page 158 Vte. Agua Santa 4211 Casilla 30-D (P.O. Box) Vina del Mar, Chile +56-32-2-320-600 Mitsubishi Electric Automation (China) Ltd. Mitsubishi Electric Automation Building, No.1386 Hongqiao Road, Shanghai,200336 +86-21-2322-3030 Mitsubishi Electric Automation (China) Ltd. 9/F, Office Tower1 Henderson Centre 18 Jianguomennei Dajie DongCheng district BeiJing 100005...

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