ProSoft Technology MVI69E-LDM-MQTT Bedienungsanleitung

MVI69E-LDM-MQTT

MQ Telemetry Transport

CompactLogix®Platform

February 10, 2021

QUICK START GUIDE

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MVI69E-LDM-MQTT Quick Start Guide

February 10, 2021

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Important Installation Instructions

Power, Input, and Output (I/O) wiring must be in accordance with Class I, Division 2 wiring methods, Article

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MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Start Here

CompactLogix® Platform Quick Start Guide

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Contents

Your Feedback Please................................................................................................................2

How to Contact Us.......................................................................................................................2

Content Disclaimer......................................................................................................................2

Important Installation Instructions................................................................................................3

Agency Approvals and Certifications...........................................................................................3

1Start Here 6

1.1 MQTT-LDM Generic and SparkplugB ...............................................................6

1.1.1 Using the MQTT LDM Generic Implementation ................................................6

1.1.2 Using the SparkplugB Implementation ..............................................................6

2Obtaining Sample Applications 8

2.1 MVI69E-LDM-MQTT Zip File.............................................................................8

2.2 Obtain MQTT Explorer.......................................................................................9

2.3 Obtain Ignition....................................................................................................9

3Connecting to the MVI69E-LDM 10

3.1 Physical Connections ......................................................................................10

3.2 Configuring the CompactLogix PLC ................................................................11

3.2.1 Firmware Update .............................................................................................12

3.3 Configuring the MVI69E-LDM’s EtherNet/IP Address .....................................13

4MQTT Generic Type Sample Application 14

4.1 Configuring the Sample Applications...............................................................14

4.1.1 MQTT Generic config.json File........................................................................14

4.1.2 SparkplugB config.json File .............................................................................15

4.2 Unencrypted Data Exchange...........................................................................16

4.3 MQTT Explorer Client Configuration................................................................17

4.4 Encrypted Data Exchange...............................................................................22

5MQTT SparkplugB Example 24

5.1 Config.json Configuration Requirements.........................................................24

5.2 Configuring the CompactLogix PLC ................................................................25

5.3 Ignition .............................................................................................................26

5.3.1 Installing .modl Files ........................................................................................27

5.4 Configuring the Unencrypted Sparkplug Data Exchange................................28

5.4.1 Logging in to Ignition........................................................................................28

5.4.2 Configuring the MQTT Broker Distributor within Ignition.................................29

5.4.3 Configuring the MQTT Subscribing Client and MQTT Engine Within Ignition.31

5.4.4 Configuring the MQTT Publishing Client and MQTT Transmission Within

Ignition 32

5.4.5 Verify Ignition to PLC Communication.............................................................33

5.5 Installing the Ignition Designer Software .........................................................34

5.5.1 Using Ignition Designer to Send Data to the PLC ...........................................34

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Start Here

CompactLogix® Platform Quick Start Guide

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6Prerequisites for Customizing the Sample Application 40

6.1 MVI69E-LDM-MQTT Zip File...........................................................................40

6.2 Turn on Hyper-V ..............................................................................................40

6.3 Docker®............................................................................................................40

7Development Setup 41

7.1 Create User......................................................................................................41

7.2 Sharing the C:/Workspace Folder....................................................................41

8Creating a Build 42

9Configuration File Details 43

9.1 Configuration File Structure.............................................................................43

9.1.1 MQTT Server Settings.....................................................................................43

9.1.2 PLC Path..........................................................................................................44

9.1.3 Sync Time with PLC ........................................................................................44

9.1.4 Status Print Interval .........................................................................................44

9.1.5 Tags.................................................................................................................44

9.2 Configuring Generic MQTT Brokers................................................................45

9.2.1 Generic MQTT Broker .....................................................................................45

9.2.2 Online MQTT Brokers......................................................................................45

9.2.3 Install MQTT Locally........................................................................................45

9.3 Running the Sample Application......................................................................46

10 MQTT-LDM Library 47

10.1 Component Diagram........................................................................................47

10.2 Main API Functions and Data Flow .................................................................48

10.2.1 Functions Implemented by the Library ............................................................48

10.2.2 Callback Function Declarations.......................................................................49

10.3 Logging............................................................................................................50

10.4 Data Flow for Reading Tag Values..................................................................50

10.5 Data Flow for Writing Tag Values....................................................................50

11 Firmware 51

11.1 Firmware Contents ..........................................................................................51

11.2 Run the Application..........................................................................................51

12 Visual Studio 2017 Project 52

12.1 Visual Studio Build...........................................................................................52

13 Support, Service & Warranty 54

13.1 Contacting Technical Support..........................................................................54

13.2 Warranty Information .......................................................................................54

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Start Here

CompactLogix® Platform Quick Start Guide

ProSoft Technology, Inc. Page 6 of 54

1 Start Here

MQTT is a lightweight messaging protocol, ideal for passing IIoT (Industrial Internet of

Things) data from remote locations. For more information, see the MQTT v3.1.1

Specification.

This Quick Start Guide describes how to:

Obtain sample applications.

Run MQTT application programs.

Setup your LDM development environment.

Customize and build your own MQTT application programs.

1.1 MQTT-LDM Generic and SparkplugB

1.1.1 Using the MQTT LDM Generic Implementation

The mqtt-ldm is a software library available for free from the ProSoft Technology

website.

This document provides step-by-step information on how to enable communication

between Rockwell Automation®’s CompactLogix®PLC and a simple MQTT broker, using

MQTT Explorer.

The goal is to read data from the PLC and publish to topics on an MQTT broker. The

module also allows subscription to topics on an MQTT broker to receive new values

published by other MQTT clients and then write them to the PLC. This is accomplished

by running the sample application on the MVI69E-LDM while connected to the MQTT

broker.

The MVI69E-LDM acts as a Message Queuing Telemetry Transport (MQTT) client. This

document references two public MQTT brokers that are available on the Internet for

testing.

Sample data exchanges can be accomplished in unencrypted mode and in encrypted

mode.

The sample application can be used as-is, or you can follow the step-by-step instructions

on how to build it from source code. The sample application features may be extended

to suit your needs.

1.1.2 Using the SparkplugB Implementation

This document provides step-by-step information on how to enable communication

between a CompactLogix PLC and Inductive Automation®’s Ignition, using MQTT

SparkplugB.

The goal is to read data from the CompactLogix PLC, then publish it by a topic to the

MQTT broker. Another MQTT client will subscribe to that topic in that MQTT broker, so

that the client can present the PLC information to the user. Additionally, the MQTT client

can publish data of that topic to the MQTT broker. The LDM-MQTT client can subscribe

to it and write the data to the PLC.

In the MQTT protocol, one MQTT client does not require to be programmatically linked

to another MQTT client.

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Start Here

CompactLogix® Platform Quick Start Guide

ProSoft Technology, Inc. Page 7 of 54

The MVI69E-LDM acts as a Message Queuing Telemetry Transport (MQTT) client. This

document references the Ignition Gateway (by Inductive Automation), a Windows

Service. It will require an up-to-date installation of three files from Cirrus link Solutions. It

provides Sparkplug B-based MQTT software modules that perform the service of MQTT

Distributor (Broker), the MQTT Engine (Subscribing Client), and the MQTT Transmission

(Publishing Client).

Videos are available to help you to become familiar with the Ignition implementation of

the MQTT and its use by the LDM-MQTT module:

Video 1: What is MQTT?

https://inductiveautomation.com/resources/video/what-is-mqtt

Video 2: How MQTT Works

https://inductiveautomation.com/resources/video/how-mqtt-works

Video 3: MQTT Sparkplug Specification

https://inductiveautomation.com/resources/video/mqtt-sparkplug-specification

Video 4: MQTT & Ignition

https://inductiveautomation.com/resources/video/mqtt-ignition

Video 5: MQTT Distributor Module

https://inductiveautomation.com/resources/video/mqtt-distributor-module

Video 6: MQTT Transmission Module

https://inductiveautomation.com/resources/video/mqtt-transmission-module

Video 7: Using the MQTT Transmission Module to Publish Data

https://inductiveautomation.com/resources/video/using-the-mqtt-transmission-module-to-

publish-data

Video 8: MQTT Engine Module

https://inductiveautomation.com/resources/video/mqtt-engine-module

Video 9: Allow Outbound Tag Writes

https://inductiveautomation.com/resources/video/allow-outbound-tag-writes

Video 10: Primary Host ID Setting

https://inductiveautomation.com/resources/video/primary-host-id-setting

Video 11: How to Set Up Transport Layer Security

https://inductiveautomation.com/resources/video/how-to-set-up-transport-layer-security

Video 12: Set Up Store-and-Forward System

https://inductiveautomation.com/resources/video/set-up-storeandforward-system

Note: Each video contains a transcript available on its webpage.

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Obtaining Sample Applications

CompactLogix® Platform Quick Start Guide

ProSoft Technology, Inc. Page 8 of 54

2 Obtaining Sample Applications

2.1 MVI69E-LDM-MQTT Zip File

The MVI69E-LDM-MQTT zip file is available at www.prosoft-technology.com. This file

contains both the Generic and SparkplugB implementations.

1 Navigate to the MVI69E-LDM product webpage.

2 Create a folder on your PC named C:\Workspace and download the MVI69E-LDM-

MQTT-xxx.zip (where xxx is version number) to this folder.

3 Unzip the file in this folder.

4 Make note of the location of the firmware file.

The interface library contains the following components:

c:\Workspace\

Subfolder

Description

aws-iot-device-sdk-

embedded-C

Open source library AWS IoT Device SDK C v4.0.0

cJSON

cJSON, open source C library to parse JSON formatted

configuration file

mqtt-ldm

MQTT-LDM Library root folder

build

Location where target binaries are created during build

docker

Toolchain to build source code and Docker®

configuration files to start container with build

environment

mqtt-ldm-lib

Source code of the library mqtt-ldm-lib, wrapper on top of

the AWS IoT Device SDK

scripts

Build scripts

mqtt-ldm-sample-

app-mvi69e

Source code of the sample application, with default

configuration file; firmware build scripts and some runtime

scripts; and optional Visual Studio 2017 solution and

project files; Visual Studio 2017 solution and project files

for sample application (optional)

src

Source code of the sample application

test-*

Folders with sample configurations file and certificates to

connect to different MQTT brokers

Firmware\ mvi69e-

ldm.firmware_<version>_

<date>.firmware

MVI69E-LDM MQTT sample application

mvi69e-ldm

Source code of dependency libraries required to

communicate with the PLC

tahu

Eclipse Tahu, an open source library with implementation

of the Sparkplug format of encoding/decoding

LDM_MQTT_.ACD

CompactLogix Ladder Logic file

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Obtaining Sample Applications

CompactLogix® Platform Quick Start Guide

ProSoft Technology, Inc. Page 9 of 54

2.2 Obtain MQTT Explorer

If you are implementing MQTT-LDM Generic, navigate to http://mqtt-explorer.com and

download MQTT Explorer to a Windows 10 PC. You do not need to perform this step if

implementing SparkplugB.

Note: The MQTT Explorer Windows installer version had issues with storing connection settings; therefore,

the portable version is recommended.

2.3 Obtain Ignition

If you are implementing MQTT-LDM SparkplugB, navigate to

https://inductiveautomation.com/downloads/.

You will need to complete a form to gain access to a free trial of Ignition.

MVI69E-LDM-MQTT ♦ MQ Telemetry Transport Connecting to the MVI69E-LDM

CompactLogix® Platform Quick Start Guide

ProSoft Technology, Inc. Page 10 of 54

3 Connecting to the MVI69E-LDM

3.1 Physical Connections

1 With the MVI69E-LDM in the CompactLogix rack, connect the top Ethernet port to

your local network, and connect to the Windows 10 PC.

2 Use the middle Ethernet port to connect to the network where the MQTT broker is

running.

3 Use the bottom port to connect the Windows 10 PC via USB to a 1756-EN2T

module. This is for debugging purposes using TeraTerm (Open Source Telnet

terminal).

Figure 1: MVI69E-LDM-MQTT Generic Type Communication Topology

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