Omron KM-N2-FLK User Manual
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Omron KM-N2-FLK User Manual

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Power Monitor
KM-N2-FLK
model
Users Manual
Thank you for purchasing this power monitor, model KM-N2-FLK
(referred to as model KM-N2 in this manual).
This Users Manual describes the functions, performance, and
application methods needed for optimum use of the unit.
Please observe the following when using this unit.
• This product is designed for use by qualified personnel with a
knowledge of electrical systems.
• Before using the product, thoroughly read and understand this Users
Manual to ensure correct use.
• Keep this Users Manual in a safe location so that it is available for
reference whenever required.
Catalog no. N200-E1-03
1.Overview of the unit
2.Installation and wiring
3.Basic use
4.Settings needed to measure
electricity
5.Other Functions
6.Detailed settings for communications
7.Troubleshooting
8.Appendices

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Table of Contents

Troubleshooting

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Summary of Contents for Omron KM-N2-FLK

  • Page 1 5.Other Functions 6.Detailed settings for communications 7.Troubleshooting Thank you for purchasing this power monitor, model KM-N2-FLK (referred to as model KM-N2 in this manual). This Users Manual describes the functions, performance, and application methods needed for optimum use of the unit.

  • Page 2: Table Of Contents

    Index Agreement regarding use ....................4 Safety precautions ......................7 Important safety points......................9 Precautions for correct use.....................10 Manual revision history ....................11 1. Overview of the unit 1.1 Main features ......................12 1.2 Device configuration ....................13 1.3 Names of the parts and their functions..............14 1.4 Dimensions .........................19 1.5 Multi-circuit metering ....................21 1.6 Multi-address system....................23...
  • Page 3 Index(continued) 4. Settings needed to measure electricity 4.1 Setting items for measuring electricity ..............53 4.2 Circuit settings ......................54 4.3 RS-485 communication settings ................59 4.4 Pulse output settings ....................62 5. Other Functions 5.1 Voltage assignment....................63 5.2 Measuring high voltage .....................64 5.3 Display unit conversion .....................65 5.4 Power saving mode....................67 5.5 Warning for voltage miss-wiring................68 5.6 Tariff feature........................69...

  • Page 4: Agreement Regarding Use

    Confirm beforehand that Omron Products are properly wired and installed for their intended use in your overall system. When using Omron Products, make sure to (i) maintain a margin of safety in relation to the published rated and performance values, such as introducing redundancy, (ii) design to minimize risks to any Customer Application in case of failure of any Omron Products, (iii) adopt system-wide safety measures to notify risks to users, and (iv) conduct regular maintenance on Omron Products and Customer Application.
  • Page 5 They are not intended to be used in the applications described below, therefore if you use Omron products in these applications, Omron provides no warranty for Omron products. However, this excepts cases where the use is a special use intended by Omron or where Omron has specifically agreed, even when used in the following applications.
  • Page 6 Replacement of the malfunctioning Omron Product(s) with the same number of replacement/alternative products at no charge to the customer. Exceptions: This warranty of Omron Products does not apply if the cause of the malfunction falls under any of the following: Usage in a manner other than the original intended use for the Omron Products.

  • Page 7: Safety Precautions

    Safety precautions Regarding the displays used to ensure safe operation and their meanings The following indications and symbols are used in this manual for precautions so that you can use the product safely. The precautions here include important information regarding safety. Please follow these instructions. The indications and symbols are as follows.
  • Page 8 Safety precautions (continued) Caution Property damage may occur due to fire. Tighten the terminal screws to the specified torques. After tightening the screw, check that the screw is not loose. M3.5 screw : 0.8N·m M3 screw : 0.5 to 0.6N·m M3 screw (KM-NCT-E's output terminal) : 0.3N·m Minor or moderate injury or property damage may occur due to explosion.

  • Page 9: Important Safety Points

    • KM-NCT-E is a dedicated CT for KM-N2-FLK and KM-N3-FLK. Do not use it for other power monitors. • The surface temperature of the CT may become high due to the heat generated by the primary power cable. Be sure to check that the surface temperature of the CT went down before touching the CT immediately after turning ON the power supply.

  • Page 10: Precautions For Correct Use

    • You cannot use the CT dedicated for use with the Omron KM series (model series KM20-CTF, model series KM- NCT) . Use a CT whose secondary output is 1A or 5A.

  • Page 11: Manual Revision History

    Manual revision history A manual revision code appears as a suffix to the catalog number on the front cover and back cover of the manual. Catalog no. N200-E1-03 Revision number Revision Date of revision Reason for revision, pages revised number 01 A April 2016 First edition...

  • Page 12: Overview Of The Unit

    CompoWay/F is Omron's unified communication procedure for general serial communications. It has a unified framework format and has commands compliant with FINS which works well with Omron programmable controllers, for instance, simplifying communications between host devices (computers for example) and components.

  • Page 13: Device Configuration

    • Although a generic CT with the secondary side output of 1A or 5A can be connected, CTs dedicated for use with KM-N2-LFK and KM-N3-FLK of 1A output type are available as listed on the table below. By using a CT listed below in combination with a KM-N2-FLK, the CE standard is supported including the use of CT and power monitors.

  • Page 14: Names Of The Parts And Their Functions

    1. Overview of the unit 1.3 Names of the parts and their functions [Main unit] Front Terminal panel cover removed          y w y w y w y w y w  y w y w y w y w y w ...
  • Page 15 1. Overview of the unit 1.3 Names of the parts and their functions (continued) Name Description :CT usage display Displays the CT number (CT1 to CT4) when measuring or setting Short press: switch circuit/move place ;<</MODE key Press and hold: switch mode Change setting or value (up) <...
  • Page 16 1. Overview of the unit 1.3 Names of the parts and their functions (continued) Right side surface    Enlarged terminal layout label Name Description Label with information such as the model, power voltage, connector layout, and FTerminal layout label serial number GTerminal panel cover Terminal panel cover with seal...
  • Page 17 1. Overview of the unit 1.3 Names of the parts and their functions (continued) [Dedicated CT] KM-NCT-E100A, -250A    (Front) (Back)   (Bottom) (Bottom (terminal cover removed)) Name Function Polarity of the primary side wiring, and models are written on this label 1 Label Secondary side current is output to this terminal block 2 Output terminal block...
  • Page 18 1. Overview of the unit 1.3 Names of the parts and their functions (continued) KM-NCT-E500A    (Front) (Back)   (Bottom) (Bottom (terminal cover removed)) Name Function Polarity of the primary side wiring, and models are written on this label 1 Label Secondary side current is output to this terminal block 2 Output terminal block...

  • Page 19: Dimensions

    1. Overview of the unit 1.4 Dimensions [Main unit] Units (mm) 66.4 Part A DIN rail Part B (Left side surface) (Front) Part A Dimensions （41.2） of moving part Ｒ20.3 Part A Dimensions of moving part Ｒ20.3 Part B Dimensions of moving part (Right side surface)
  • Page 20 1. Overview of the unit 1.4 Dimensions (continued) [Dedicated CT] KM-NCT-E100A, -250A Units (mm) (1.5) (2.5) CT INNER DIAMETER 4-R8.5 ɸ24 KM-NCT-E500A Units (mm) (1.5) (2.5) 40.5 CT INNER DIAMETER 4-R13.5 ɸ36...

  • Page 21: Multi-Circuit Metering

    1. Overview of the unit 1.5 Multi-circuit metering Multi-circuit metering is possible with this product. Measuring circuit refers to the measurement point where electricity measuring is conducted. Furthermore, this product measures voltage commonly across all circuits and measures current with each separate circuit by using generic CTs. ●...
  • Page 22 1. Overview of the unit 1.5 Multi-circuit metering (continued) ● Allocating the circuits used and the CTs for each phase and wire type The following table shows the phase and wire types and the CT allocations for each measuring circuits. As circuit A is used irrespective of the phase and wire type, you must make settings for measurement ("Circuit A settings(...

  • Page 23: Multi-Address System

    1. Overview of the unit 1.6 Multi-address system This product is a multi-address system where different communications addresses (numbered in order) are allocated to each circuit.The communications addresses correspond to each measuring point, so data transmission management from the host device is simplified. The following diagram is an overview of the multi-address system.

  • Page 24: Mode Configuration

    1. Overview of the unit 1.7 Mode configuration This model has three modes: measuring mode, setting mode, and communication setting mode. – Measuring mode: The measured values for each circuit are displayed. – Setting mode: By operating keys on the body of the unit you can change settings for each of the circuits, and make common settings for communications, output, the display, etc.

  • Page 25: Installation And Wiring

    Fix the DIN rail to the installation location – DIN rail (recommended product): Model PFP-50N/-100N (from Omron) Pull down the DIN hook on the bottom of the body of the unit DIN hook...
  • Page 26 These stop the units from jumping off the DIN rail due to vibration or impacts. – End plate (recommended part): model PFP-M (from Omron) • Make sure you install so there is space for wiring above and below the body of the unit.

  • Page 27: Wiring The Cts

    2. Installation and wiring 2.2 Wiring the CTs You can connect up to a maximum of 4 generic CTs to this unit ( 21). The number of CTs used depends on the phase and wire type of the power source being monitored. The following table shows the phase and wire types and the CTs to use for each. For example, use CT1 when measuring only one 1-phase 2-wire circuit.
  • Page 28 2. Installation and wiring 2.2 Wiring the CTs (continued) Using KM-NCT-E@@@A The wiring method when using the KM-NCT-E@@@A, a dedicated CT for 1A output, is as follows. • For wiring of the output terminal of CT, use AWG18-14 electric wire (with a cross-section of 0.75-2.0mm ) and Y- shape terminal compatible with the M3 screw.

  • Page 29: Wiring For Power And Monitored Voltage Input

    2. Installation and wiring 2.3 Wiring for power and monitored voltage input Voltage input terminals V on this product act as both operating power terminals and as voltage measuring terminals. The layout of voltage input terminals is as follows. Voltage input terminals Voltage input terminals Phase and wire type 4-phase 3-wire...
  • Page 30 2. Installation and wiring 2.3 Wiring for power and monitored voltage input (continued) Wire the device according to the phase and wire type as shown in the following diagram. Install a branch circuit breaker between the wiring for each of R/S/T/N, L/N and R/N/T so that the power can be turned off immediately.

  • Page 31: Fitting The Cts To The Measuring Wires

    2. Installation and wiring 2.4 Fitting the CTs to the measuring wires When monitoring one circuit with 1-phase 2-wire, you need one CT. When monitoring one circuit with 1-phase 3-wire, you need 2 CTs. When monitoring one circuit with 3-phase 4-wire, you need 3 CTs. The following diagram is an example of fitting CTs when monitoring one circuit with 1-phase 2-wire.

  • Page 32: Pulse Output Wiring

    2. Installation and wiring 2.5 Pulse output wiring Wire the pulse output terminals if using the pulse output feature. The layout of pulse output terminals is as follows. Pulse output terminal Terminal Terminal Description number name OUT1 Pulse output 1 OUT2 Pulse output 2 OUT3...
  • Page 33 2. Installation and wiring 2.5 Pulse output wiring (continued) The following diagram shows wiring for pulse output. This unit is equipped with 4 pulse outputs. The common terminal (number 5) is a common terminal. NPN output connection diagram PNP output connection diagram ＋...
  • Page 34 2. Installation and wiring 2.5 Pulse output wiring (continued) Cautions when connecting the Push-In Plus terminal (RS-485 communication terminal and pulse output terminal) Follow the below steps when connecting the Push-In Plus terminal 1 Connecting Wires to Push-In Plus Terminal Block •...
  • Page 35 2 Removing Wires from Push-In Plus Terminal Block • ecommended Flat-blade Screwdriver Use a flat-blade screwdriver to connect and remove wires. Use the following flat-blade screwdriver. Model Manufacturer Side Front XW4Z-00B Omron 2.5 dia. 0.4 mm 2.5 mm...

  • Page 36: Wiring

    2. Installation and wiring 2.6 RS-485 wiring Wire the RS-485 terminals if using the RS-485 communication feature. The layout of RS-485 terminals is as follows. RS-485 terminal Terminal Terminal Description number name RS-485i iterminal for RS-485 RS-485j jterminal for RS-485 RS-485i RS-485iterminal (for crossover wiring) RS-485j...
  • Page 37 • If the upstream device does not support RS-485 communications, refer to the table below to select a converter for your purpose. Protocol KM-N Setting Tool USB/RS-485 converter operability confirmed Modbus SI-35USB (LINEEYE Co., Ltd.) CompoWay/F K3SC-10 (Omron), SI-35USB (LINEEYE Co.,Ltd.)

  • Page 38: Wiring Diagrams

    2. Installation and wiring 2.7 Wiring diagrams The below table shows the wiring for voltage, current, and CT by each phase and wire type. ■ For 3-phase 4-wire 3-phase 4-wire measures one circuit, as shown in the following diagram. Power side R S T N Branch circuit...
  • Page 39 2. Installation and wiring 2.7 Wiring diagrams (continued) ■ For 1-phase 3-wire As shown below, 1-phase 3-wire can measure a maximum of 2 circuits. Use CT1,CT2 when measuring only 1 circuit. The CT must be attached to the R-phase and the T-phase. Power side R N T Branch...
  • Page 40 2. Installation and wiring 2.7 Wiring diagrams (continued) The following wiring is also possible as a further method of measuring. ■ For 1-phase 2-wire voltage selected The 1-phase 2-wire branching off from the 1-phase 3-wire is measured. With this connection, a setting is required according to which of R-N phase, T-N phase, or R-T phase is connected to the 1-phase 2-wire circuit.

  • Page 41: Basic Use

    • The software version is shown on the main display, the model number "KM-N2" is shown on the sub-display, and all of the LEDs light. • After this, the measuring mode is moved to automatically and the active energy (import) (kWh) for circuit A is displayed. KM-N2 OMRON SMART POWER MONITOR /MODE POWER ERROR...

  • Page 42: Switching Between Modes

    3. Basic use 3.2 Switching between modes Switching between the measuring mode and the setting mode Switch between the measuring mode and setting mode by pressing and holding the [<</MODE] key. • "Press and hold" means pressing the key for 1 or more seconds. ■...
  • Page 43 3. Basic use 3.2 Switching between modes (continued) Switching between the setting mode and the communication setting mode You can switch between the setting mode and the communication setting mode by sending particular commands. Refer to "6.Detailed settings for communications ( 74)" for details about the commands. It is not possible to move from the communication setting mode to the setting mode.

  • Page 44: How To Read The Measurements

    3. Basic use 3.3 How to read the measurements The measurements are shown for circuits A to D in the measuring mode. Depending on the phase and wire type selected, the display changes as follows. The parts in broken lines (circuits B to D) are displayed if you have enabled the circuit settings ( 56). 3-phase 4-wire Circuit A (3P4W)
  • Page 45 3. Basic use 3.3 How to read the measurements (continued) ● Switching circuits Press the [<</MODE] key to switch the circuit displayed.The measuring items are displayed after the screen for showing the destination circuit. • The measuring items for circuits B to D are displayed when the circuit settings are enabled (ON). •...
  • Page 46 3. Basic use 3.3 How to read the measurements (continued) ■ Measurement display list Order of Item Main display/numerals Sub display/units Remarks display 0.000 to 999999.999 Active energy Units automatically switch* (import) 1000.000 to 999999.999 Active power -99999.999 to 999999.999 A_R : 3-phase 4-wire A : 1-phase 2-wire A_R : 1-phase 3-wire...
  • Page 47 3. Basic use 3.3 How to read the measurements (continued) Order of Item Main display/numerals Sub display/units Remarks display V_R-s : 3-phase 4-wire None : 1-phase 2-wire None : 1-phase 3-wire Inter-wire voltage 1 0.0 to 99999999.9 V_R-s : 3-phase 3-wire : 1-phase 2-wire voltage None selected...
  • Page 48 3. Basic use 3.3 How to read the measurements (continued) Order of Item Main display/numerals Sub display/units Remarks display kwh (flashes) Active energy 0.000 to 999999.999 (import) Units automatically switch* mwh (flashes) 1000.000 to 999999.999 (resettable) -kwh (flashes) Active energy 0.000 to 999999.999 (export) Units automatically switch*...

  • Page 49: How To Read The Setting Values

    3. Basic use 3.4 How to read the setting values The setting mode is organized into the categories "Individual setting items for circuits A to D", "Common settings", and "Other settings". Category Description Circuits (A, B, C, D) Individual setting items for the circuits Common (CMMN) Setting items common to all of the circuits (communication, pulse output, etc.) Others (ETC)
  • Page 50 3. Basic use 3.4 How to read the setting values (continued) ● How to switch setting items When the [<</MODE] key is pressed, the setting items are displayed after the screen for showing the destination circuit. • The setting items for circuits B to D are displayed when the circuit settings are enabled (ON). •...
  • Page 51 3. Basic use 3.4 How to read the setting values (continued) ■ Setting item list Cate- MENU Main display Sub display Default Setting Item Remarks gory Display of options and input values Unit Value 3P4W: 3-phase 4-wire, 1P2W: 1-phase 2-wire 3P4W / 1P2W / 1P3W / 1P3W: 1-phase 3-wire, 3P3W: 3-phase 3-wire Phase and wire type...
  • Page 52 3. Basic use 3.4 How to read the setting values (continued) MENU Main display Sub display Default Circuit Setting Item Remarks Display of options and input values Unit Value Protocol MODBS / COMPF PRTCL MODBS 1.2K / 2.4K /4.8K Communication speed 9.6K 9.6K / 19.2K / 38.4K(bps) Modbus: 8 (fixed)

  • Page 53: Settings Needed To Measure Electricity

    4. Settings needed to measure electricity 4.1 Setting items for measuring electricity 4. Settings needed to measure electricity The following are the setting items for measuring electricity. Setting category: Circuits (A, B, C, D) Circuit A setting items ( 54) Circuit B to D setting items ( ...

  • Page 54: Circuit Settings

    4. Settings needed to measure electricity 4.2 Circuit settings Correct measurement requires the correct settings for phase and wire type, CT secondary side, and CT primary side. If points of measurement are added, enable the use of circuits B to D and set them. ●...
  • Page 55 4. Settings needed to measure electricity 4.2 Circuit settings (continued) Set the CT secondary side current (Ex.: set to 1A) 1 From the circuit A setting item, press the [ ] keys to move to "CT secondary current (MENU A3)". 2 Press the [ENTER] key to enter the setting mode.
  • Page 56 4. Settings needed to measure electricity 4.2 Circuit settings (continued) ● Settings for circuits B to D (when measuring 2 circuits or more) This product can measure up to 4 circuits. If you increase the number of circuits, you must enable the circuits and set the items for them.
  • Page 57 4. Settings needed to measure electricity 4.2 Circuit settings (continued) Enable just those circuits from B to D that will be used (Ex.: enable circuit C) If a measured value is displayed, press and hold the [<</MODE] key and enter your password to switch to the setting mode.
  • Page 58 4. Settings needed to measure electricity 4.2 Circuit settings (continued) Set the CT primary current for the circuits enabled from B to D (Ex.: set the CT primary current for circuit C to 50A) 1 From the circuit C setting item, press the [ ] keys to move to "CT primary current (MENU C4)".

  • Page 59: Communication Settings

    4. Settings needed to measure electricity 4.3 RS-485 communication settings For communications settings other than the communications address, set in the common settings in the settings mode. All circuits will have the same setting. • You can cancel a change by pressing the [ESC] key before confirming the change. ■...
  • Page 60 4. Settings needed to measure electricity 4.3 RS-485 communication settings (continued) ■ Set the data bit length (Ex.: set to 7 bits) Can only be set when the protocol is CompoWay/F. 1 Press the [<</MODE] key to move to the common settings "CMMN" category display screen. 2 From the common setting items, press the [ ] keys to move to "Data length (MENU 02)".
  • Page 61 4. Settings needed to measure electricity 4.3 RS-485 communication settings (continued) ■ Set the vertical parity (Ex.: set to ODD) Select "NONE" for no parity, "EVEN" for even parity, and "ODD" for odd parity. 1 Press the [<</MODE] key to move to the common settings "CMMN" category display screen. 2 From the common setting items, press the [ ] keys to move to "Parity (MENU 04)".

  • Page 62: Pulse Output Settings

    4. Settings needed to measure electricity 4.4 Pulse output settings This product has 4pulse output ports (OUT1, OUT2, OUT3, OUT4). You can set output ON or OFF for each output port in the pulse output settings. When the active energy exceeds the output units, a pulse wave is output from the ports for which pulse output is set to ON.

  • Page 63: Other Functions

    5. Other Functions 5.1 Voltage assignment 5. Other Functions If the phase and wire type has been set to 1-phase 2-wire voltage selected (1P2W2) or 1-phase 3-wire composite (1P3W2), then you need to set the voltage for the 1-phase 2-wire circuit doing the measuring. Set either R-N phase or T-N phase if the input voltage is AC100V, and set R-T phase of the input voltage is AC200V.

  • Page 64: Measuring High Voltage

    5. Other Functions 5.2 Measuring high voltage When measuring 6600V within a cubicle, for example, and the measured voltage exceeds 480V, you need to use a transformer to convert the voltage to fit within the input voltage range of this unit. Set the multiplication factor from the primary voltage value and the secondary voltage value.

  • Page 65: Display Unit Conversion

    5. Other Functions 5.3 Display unit conversion You can multiply the active energy for each circuit by a specified factor and display the result along with a unit. You can convert the active energy to a monetary figure or volume of CO .
  • Page 66 5. Other Functions 5.3 Display unit conversion (continued) ■ Set the conversion display units (Ex.: set to If a measured value is displayed, press and hold the [<</MODE] key and enter your password to switch to the setting mode. 1 Press the [<</MODE] key to move to the common settings "CMMN" category display screen. 2 From the common setting items, press the [ ] keys to move to "Conversion display units (MENU 08)".

  • Page 67: Power Saving Mode

    5. Other Functions 5.4 Power saving mode This feature turns the LCD display off after the set time elapses. When the LCD is off, it can be turned on again by operating any key. ■ Set the automatic LCD off time (Ex.: set to 10 minutes) If a measured value is displayed, press and hold the [<</MODE] key and enter your password to switch to the setting mode.

  • Page 68: Warning For Voltage Miss-Wiring

    5. Other Functions 5.5 Warning for voltage miss-wiring This feature shows alarms when voltage phase for the phase and wire type is open, when the wrong phase sequence (for 1-phase 3-wire, 3-phase 3-wire, and 3-phase 4-wire) is detected, when the active power is a negative value, or when the frequency goes out of the rated range (...

  • Page 69: Tariff Feature

    5. Other Functions 5.6 Tariff feature This feature allows you to select a location to save cumulative active energy data from T1 to T4. Using the tariff feature allows you to, for example, change the location to save active energy so that you can later on check the sum of active energy during a particular time period (for example, night and day when the electricity charges are different).

  • Page 70: Change Password

    5. Other Functions 5.7 Change password • This enables you to change the password that you need to enter when moving from the measuring mode to the setting mode. • You can set a password of 4 numerals between 0000 and 9999. •...

  • Page 71: Checking Software Version

    5. Other Functions 5.8 Checking software version You can check the version of software this product is using. ■ Checking software version If a measured value is displayed, press and hold the [<</MODE] key and enter your password to switch to the setting mode.

  • Page 72: Initialize

    5. Other Functions 5.9 Initialize There are three different types of initialization. (1) Resetting the active energy for each circuit (2) Resetting the active energy for all circuits (3) Resetting the active energy and setting values for all circuits • Setting values remain unchanged if you do either (1) or (2). •...
  • Page 73 5. Other Functions 5.9 Initialize (continued) ■ Resetting the active energy for all circuits If a measured value is displayed, press and hold the [<</MODE] key and enter your password to switch to the setting mode. 1 Press the [<</MODE] key to move to the other settings "ETC" category display screen. 2 From the other setting items, press the [ ] keys to move to "All active energy reset (MENU 91)".

  • Page 74: Detailed Settings For Communications

    6. Detailed settings for communications 6.1 Overview of communications 6. Detailed settings for communications Using the communications features enables you to create programs on host devices (such as computers) to collect the data measured by this product and to change its settings. Each circuit on this product is allocated different communications addresses (numbered in order).

  • Page 75: Modbus

    6. Detailed settings for communications 6.2 Modbus ● Data format In the following explanations, values preceded by H' (as in H'02) indicate hexadecimal values. The numbers under the frame sections are the number of bytes. Also, the transfer code is binary for Modbus. ■...
  • Page 76 6. Detailed settings for communications 6.2 Modbus (continued) ■ Response frame when there is an error Commun Function Error ication CRC-16 code code address Communication address The number specified by the command from is inserted as is. This is the communication address that returned the response. Function code In the response frame when an error occurs, the addition of "H'80"...
  • Page 77 6. Detailed settings for communications 6.2 Modbus (continued) ● List of function codes (FC) Function code Name Description 03(H’03) Variable area reading Variable area is read successively. 16(H’10) Variable area writing Variable area is written successively. 06(H’06) Command Operations are performed according to commands. 08(H’08) Echo back test Echo back test is performed.
  • Page 78 6. Detailed settings for communications 6.2 Modbus (continued) ● Service details ■ Variable area read (03: H’03) This service allows you to read all variable areas. Reading of the variable areas is conducted by setting the required data in the following command frame.To read setting values "Parameter area list (...
  • Page 79 6. Detailed settings for communications 6.2 Modbus (continued) Response frame Commu Function Byte nication Data 1 Data 1 Data 2 Data 2 code Counter address H’03 Upper Lower Upper Lower 4 bytes worth of the number of elements Data n Data n CRC-16 Upper...
  • Page 80 6. Detailed settings for communications 6.2 Modbus (continued) ■ Variable area writing (16: H’10) Writing to the variable areas is conducted by setting the required data in the following command frame. The parameter area can be written to. Before writing, you need to first move to the setting mode with a command. The content written is reflected by moving to the measuring mode in response to an instruction after writing of the parameters.
  • Page 81 6. Detailed settings for communications 6.2 Modbus (continued) Response frame Commu Function Start writing Number of nication CRC-16 code address elements address H’10 • Start writing address The start writing address that was received. • Number of elements The number of elements that were received. •...
  • Page 82 6. Detailed settings for communications 6.2 Modbus (continued) ■ Command (06: H’06) Command frame Commu Function Start writing Written data CRC-16 nication code address address H’06 H’FF H’FF Fixed Fixed Response frame Commu Function Start writing Written data CRC-16 nication code address address...
  • Page 83 6. Detailed settings for communications 6.2 Modbus (continued) Command/Response example The following is an example of an instruction for clearing the active energy. (Communication address: When H’01) Command code: "03" Related information: "00" Command Commu Function Start writing nication Written data CRC-16 code address...

  • Page 84: Compoway/F

    6. Detailed settings for communications 6.3 CompoWay/F ● Data format In the following explanations, values preceded by H' (as in H'02) indicate hexadecimal values. Only items expressed as normal numerals or characters indicate ASCII characters. The numbers under the frame sections are the number of bytes. ■...
  • Page 85 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Response frame Communication Sub-address Exit code Command text address Fixed Fixed Exit Name Description Error detection code Priority Normal end This indicates that the command ended normally and None that there was no error. FINS command error The specified FINS command could not be executed.
  • Page 86 6. Detailed settings for communications 6.3 CompoWay/F (continued) For example: The sub-address is less than 2 characters and there is no SID or FINS-mini Command Communication address The sub-address lacks a character Response Communication Sub-address Exit code address The sub-address is "00" and the exit code is "16" (a sub-address error). ●...
  • Page 87 6. Detailed settings for communications 6.3 CompoWay/F (continued) ● Type code The type codes used with this product are as follows. ■ Variable area Variable type code Description The measured values ■ Parameter area Variable type code Description C000 The parameter values for various settings ●...
  • Page 88 6. Detailed settings for communications 6.3 CompoWay/F (continued) ● List of response codes When normal end code Name Description Priority 0000 Normal end No error. None When an error occurs code Name Description Priority 0401 Unsupported command This is an unsupported service function. 1001 Over command length The command length is too long.
  • Page 89 6. Detailed settings for communications 6.3 CompoWay/F (continued) ● Service details Addresses, numbers of elements, and data re shown in hexadecimal notation. ■ Variable area read (0101) Variable area is read. Service request PDU Variable Start reading Number of Type address Position elements...
  • Page 90 6. Detailed settings for communications 6.3 CompoWay/F (continued) Example of read variable area communications This example shows how to read the two measurement values with one command when the measurement is of voltage 1 at 103.7V and voltage 2 at 103.6V Command “(H’02) 0000...
  • Page 91 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Read parameter area (0201) Parameter area is read. Service request PDU Parameter type Start reading Number of address elements Service response PDU (normal) Response Parameter Start Number of Read data code Type reading elements...
  • Page 92 6. Detailed settings for communications 6.3 CompoWay/F (continued) Example of read parameter area communications This example shows how to read two settings with one command where the phase and wire type is set to 1-phase 2-wire and the communications address is 10 Command "(H’02) C000...
  • Page 93 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Write parameter area (0202) Writing to the parameter area starts. This service is made valid by using a command to move to the settings mode. The content written is reflected by moving to the measuring mode in response to an instruction after writing of the parameters.
  • Page 94 • Model The model is displayed in 10 bytes of ASCII code. Space codes are used if the model doesn't take up 10 bytes. For example: This will be as follows for model KM-N2-FLK • Buffer size The buffer size 230 is read as "00E6" (fixed value).
  • Page 95 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Controller status read (0601) Reads operational state and error status. Service request PDU Service response PDU (normal) Response code Operational Related state information • Operational state Operational state Description The unit is measuring without error. An error has occurred and measuring has stopped.
  • Page 96 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Echo back test (0801) Echo back test is performed. Service request PDU Test data 0 to 200 Service response PDU (normal) Response code Test data 0 to 200 • Test data Set any test data within the range 0 to 200.
  • Page 97 6. Detailed settings for communications 6.3 CompoWay/F (continued) ■ Command (3005) Used when remotely controlling the unit. Service request PDU Instruction Related code information Service response PDU (normal) Response code • List of command codes and related information Related information is fixed at 00. Instruction code Related Instruction details...

  • Page 98: Address Map

    6. Detailed settings for communications 6.4 Address map ● List of variable areas (measurement values) Used when remotely controlling the unit. address Item Parameter name Monitor value Modbus CompoWay/F 0000 0000 Voltage 1 (V) H'00000000 to H'0098967F 0002 0001 Voltage 2 (V) (0 to 9999999) 10 times the voltage 0004...
  • Page 99 6. Detailed settings for communications 6.4 Address map (continued) address Item Parameter name Monitor value Modbus CompoWay/F 0228 0114 Cumulative total reactive power (not resettable) (kVarh) 022A 0115 T1 Active energy (import) (not resettable) (kWh) 022C 0116 T2 Active energy (import) (not resettable) (kWh) 022E 0117 T3 Active energy (import) (not resettable) (kWh)
  • Page 100 6. Detailed settings for communications 6.4 Address map (continued) ● Parameter area list Address Type Parameter name Setting (monitor) value Modbus CompoWay/F H'00000000:1P2W H'00000001:1P3W H'00000002:3P3W 2000 1000 Phase and wire type H'00000003:1P2W2 H'00000004:1P3W2 H'00000005:3P4W H'00000001 to H'00000063 (1 to 99): Modbus 2002 1001 Communication address...
  • Page 101 6. Detailed settings for communications 6.4 Address map (continued) address Type Parameter name Setting (monitor) value Modbus CompoWay/F H'00000064 to H'0001869F 220E 1107 VT ratio (100 to 99999) 100 times the VT ratio H'00000000 to H'0001869F 2210 1108 Conversion factor (0 to 99999) 1000 times the factor Characters in hexadecimal display of 3 characters...

  • Page 102: Troubleshooting

    7. Troubleshooting 7.1 Warnings Troubleshooting Warnings come as errors and alarms. The types of errors and alarms are described below. Display Warning type Description Action to take display display Setting value Internal memory corrupted E-M1 error Repair is necessary. Contact the Error Measured value Error...

  • Page 103: Troubleshooting

    7. Troubleshooting 7.2 Troubleshooting Check if an issue is covered by the following items if the product doesn't seem to be working correctly. Phenomena Description Action to take Page The main unit doesn't start Is the power LED off? The unit isn't being supplied with power. Check that the voltage terminals have ...
  • Page 104 7. Troubleshooting 7.2 Troubleshooting (continued) Phenomena Description Action to take Page There is a large Does the selected phase Wire correctly.  38 discrepancy in measured and wire type match the values wiring? Does the CT match the Check the secondary current and secondary current and primary current of the CT you are using ...
  • Page 105 7. Troubleshooting 7.2 Troubleshooting (continued) Phenomena Description Action to take Page RS-485 communications Is the wiring correct? Wire correctly.  36 not possible Are the communications Check that the communications settings settings correct? between this product and the host  59 system match.

  • Page 106: Appendices

    8. Appendices 8.1 Specifications Appendices ■ Main unit specifications Item Description Rated input voltage 3-phase 4-wire: AC100 to 277V (L-N), AC173 to 480VAC (L-L) (Common voltage and 1-phase 2-wire: AC100 to 277V current) 1-phase 3-wire: AC100 to 240V (L-N), AC200 to 480VAC (L-L) 3-phase 3-wire: AC173 to 480VAC (L-L) Rated frequency 50/60Hz...
  • Page 107 Maximum current for CT secondary side * You cannot use the CT dedicated for use with the Omron KM series (model series KM-NCT, model series KM20- CTF, etc.). Use a generic CT whose secondary output is 1A or 5A. ■ Output specifications...
  • Page 108 8. Appendices 8.1 Specifications (continued) ■ Dedicated CT specifications Model KM-NCT-E100A KM-NCT-E250A KM-NCT-E500A Rated primary current: In 100 A 250 A 500 A Rated secondary current: Is 1 A Rated frequency 50/60 Hz Overcurrent withstand 1.2 In capability (continuous) Overcurrent withstand 4 In capability (1 sec) Output characteristics...

  • Page 109: Ascii Code Table

    8. Appendices 8.2 ASCII code table Binary Decimal Hexadecimal Character Binary Decimal Hexadecimal Character 0000000 0100000 0000001 0100001 0000010 0100010 " 0000011 0100011 0000100 0100100 0000101 0100101 0000110 0100110 & 0000111 0100111 ’ 0001000 0101000 0001001 0101001 0001010 0101010 0001011 0101011 0001100 0101100...
  • Page 110 8. Appendices 8.2 ASCII code table (continued) Binary Decimal Hexadecimal Character Binary Decimal Hexadecimal Character 1000000 1100000 1000001 1100001 1000010 1100010 1000011 1100011 1000100 1100100 1000101 1100101 1000110 1100110 1000111 1100111 1001000 1101000 1001001 1101001 1001010 1101010 1001011 1101011 1001100 1101100 1001101 1101101...

  • Page 111: Segment Displays And 7 Segment Displays

    8. Appendices 8.3 14 segment displays and 7 segment displays The following are some examples of 14 segment displays and 7 segment displays as shown on the LCD of this product. (example of 14 segment display) (example of 7 segment display)
  • Page 112 The Netherlands Hoffman Estates, IL 60169 U.S.A. Tel: (31)2356-81-300/Fax: (31)2356-81-388 Tel: (1) 847-843-7900/Fax: (1) 847-843-7787 © OMRON Corporation 2016-2018 All Rights Reserved. OMRON (CHINA) CO., LTD. OMRON ASIA PACIFIC PTE. LTD. In the interest of product improvement, Room 2211, Bank of China Tower, No.

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