This article connects Omron’s KM-PMBN-EIP power monitor to Codesys Runtime via Ethernet/IP.

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KM-PMBN-EIP

The Omron KM-PMBN-EIP used in this article is a 38mm-wide Ethernet/IP-compatible power monitor designed for global control panels.

Wiring

This is a wiring example for Omron’s KM-PMBN-EIP.

CT

The table below shows the phase/wire type and CT assignment for each measurement circuit. By enabling circuits B through D to increase the number of measurement points, power measurement is possible with the required number of circuits.

Note that it is disabled by default.

Power supply and monitored voltage input wiring

As shown in the diagram below, wire the equipment according to the phase and wire type.

Install branch circuit breakers between each of the R/S/T/N, L/N, and R/N/T wiring pairs to enable immediate power disconnection.

Ethernet/IP Connection Specifications

This is the Ethernet/IP connection specification for Omron’s KM-PMBN-EIP.

Assembly Object

This is the specification for each assembly of Omron’s KM-PMBN-EIP.

The correspondence between phase, wire type, and instance ID is as follows.

Instance ID 100-103

The assignments for instance IDs 100, 101, 102, and 103 are identical.

Status information

This is the meaning of the Status word in DWORD0.

Implementation

Now let’s actually create a project.

OMRON Side

First, configure from the Omron KM-PMBN-EIP side.

Download the tool

To configure the IP address and internal settings for the KM-PMBN-EIP, please download the Condition Monitoring Configuration Tool from the link below.

https://www.fa.omron.co.jp/products/family/3955/download/software.html

Download the EDS

Similarly, please download the KM-PMBN-EIP EDS file from the link below.

https://www.fa.omron.co.jp/products/family/3955/download/software.html

Tool Installation

Launch the setup file you downloaded earlier.

Set the installation language.

Next> to proceed.

Agree to the license and proceed with Next>.

Set the installation location for the tool, then proceed by clicking Next>.

Install the tool and start it.

Please wait a moment…

Done!

Create a project

Launch the Condition Monitoring Configuration Tool from earlier and click Create Project.

Set the project save location and proceed by clicking OK.

Proceed with OK.

Add Device

Next, click the button shown below to add a new power meter.

Set the name of the power meter.

Select KM-PMBN-EIP from the drop-down list for use in this article.

Proceed with OK.

Done!

Main Unit Settings

Click the device you just added.

IP Setting

The factory default IP address is “192.168.250.50”. When configuring it on your PC, ensure it does not conflict with other devices. Also, set the IP address according to your application and write the IP address using the Write function.

Just a second…

Done!

Additionally, you can click the Execute button to perform a communication test.

Initial Settings

Next, proceed to the Initial Settings Tab.

In this example, since it’s a 1P2W configuration, we’ll use CT1-4. Then set the conversion range for each CT → and write the parameters to the main unit using Write.

Codesys Side

Next, configure the Codesys side.

Import the EDS File

Click Tools→Device Repository.

Click Install.

Let’s install the EDS file you downloaded earlier.

Done!

Add the Ethernet Interface

Right-click Device → Add Device.

Click Ethernet Adapter→Ethernet to add an Ethernet interface.

Add the Ethernet/IP Scanner

Next, right-click the Ethernet interface and select Add Device.

Select the Ethernet/IP Scanner → Add Device.

Add the Device

Finally, to add the Omron KM-PMBN-EIP used in this article, go to Ethernet/IP Scanner → right-click → Add Device.

Select Omron’s KM-PMBN-EIP → Add Device.

Done!The Omron KM-PMBN-EIP has been added to this.

IP Address

Configure the IP address of the Omron KM-PMBN-EIP according to your network configuration.

Add the Connection

Next, add an Ethernet/IP connection.

In this example, since it’s a 1P2W configuration, we will use CT1-4, so please add it to Assembly 100-103 as well.

Done!

Address mapping

Finally, it’s the address configuration. Since the Omron KM-PMBN-EIP is divided into sections for each connection, forcing an address at the beginning makes GVL mapping easier.

DUT

This is a structure created to match the Ethernet/IP connection for Omron’s KM-PMBN-EIP.

TYPE udtOMRONKMPMBNEIP :
STRUCT
dwStatusInformation : DWORD;
udiVoltage1 : UDINT; // [V]
udiVoltage2 : UDINT; // [V]
udiVoltage3 : UDINT; // [V]
udiCurrent1 : UDINT; // [A]
udiCurrent2 : UDINT; // [A]
udiCurrent3 : UDINT; // [A]
diPowerFactor : DINT;
udiFrequency : UDINT; // [Hz]
diActivePower : DINT; // [W]
diReactivePower : DINT; // [Var]
udiVoltageV1V2 : UDINT; // [V]
udiVoltageV1V3 : UDINT; // [V]
udiVoltageV2V3 : UDINT; // [V]
udiActiveEnergyImport : UDINT; // [Wh]
udiActiveEnergyExport : UDINT; // [Wh]
udiReactiveEnergyImport : UDINT; // [Varh]
udiReactiveEnergyExport : UDINT; // [Varh]
udiCumulativeReactivePower : UDINT; // [Varh]
udiT1ActiveEnergyWh : UDINT; // [Wh]
udiT2ActiveEnergyWh : UDINT; // [Wh]
udiT3ActiveEnergyWh : UDINT; // [Wh]
udiT4ActiveEnergyWh : UDINT; // [Wh]
udiT1ActiveEnergyKWh : UDINT; // [kWh]
udiActiveEnergyExportKWh : UDINT; // [kWh]
udiReactiveEnergyImportKVarh : UDINT; // [kVarh]
udiReactiveEnergyExportKVarh : UDINT; // [kVarh]
udiCumulativeReactivePowerKWh : UDINT; // [kWh]
udiT1ActiveEnergyKWh2 : UDINT; // [kWh]
udiT2ActiveEnergyKWh : UDINT; // [kWh]
udiT3ActiveEnergyKWh : UDINT; // [kWh]
udiT4ActiveEnergyKWh : UDINT; // [kWh]
udiConversionValue1000 : UDINT;
udiConversionValue0001 : UDINT;
END_STRUCT
END_TYPE